DyFemer
A.Amele
50% sprout emergence time computation in days
IITA
IITA
Inflorescence type estimation
A.Amele
A.Amele
Weight medium tubers per plot measurement in kg
IITA
Mtbrwt
IITA
Btbrwidth
A.Amele
Big tuber width computation in cm
Not sticky
0
1
No visible symptoms of anthracnose disease or infection spot on the leaf surface
Symptom on >51% of the plant. Coalesced spots with dry tissue and covering a signifcant proprotion of the leaf surface. Areas with less than 1 cm width are coalescing to bigger spots also. Yellowing of green tissue is intense around the spots areas.
4
100
Present
1
slightly oxidizing
IITA
Secondary sprouting estimation nominal 0&1
A.Amele
SECSP
A.Amele
IITA
Number of branches per plant count
A.Amele
stemdim
IITA
Stem diameter computation in mm
DtFFlr
Flowering time estimation in yy/mm/dd
A.Amele
IITA
A.Amele
IITA
Cohesiveness estimation 1-3
not attractive
1
A.Amele
First inflorescence initiation time computation
IITA
A. Lopez-Montes
IITA
Stems per plant computation per plant
stnp
Bulbils per plant computation
Aetbrpl
A.Amele
IITA
Weight of big tubers per plot measurement in kg
Btbrwt
A.Amele
IITA
few thorns or spines on tuber surface
3
Tuber flesh color gradient computation
D.Cornet
Cirad
A.Amele
Fruit index computation 0 to 1
IITA
IITA
Fruit harvest time estimation in yy/mm/dd
A.Amele
flcol_uni
Uniformity of tuber flesh color estimation binary 0&1
A.Amele
IITA
2
Oval
S_Bri
IITA
Tuber dry rot incidence computation in %
A. Lopez-Montes
A. Lopez-Montes
End of flowering time estimation in yy/mm/dd
DtendFlr
IITA
A.Amele
IITA
Total tuber weight per plant computation in kg
3
highly oxidizing
4
Monoecious female(f>m)
A.Amele
Seeds sown/family counting
IITA
50% sprout emergence time estimation in yy/mm/dd
A.Amele
IITA
DtFemer
Appearance of tuber surface estimation 1-4
A. Lopez-Montes
IITA
Bowen University, Nigeria
Pounded yam colour scale 1-9
Bolanle Otegbayo
YamCol_Meas_1to9
Color_PY
pounded yam color estimation 1-5 scale
A.mele
IITA
1
White
A.Amele
Petiole length measurement in cm
IITA
Crop cover compactness computation
D.Cornet
Cirad
IITA
R_Kni
Root knot nematode incidence computation %
A. Lopez-Montes
NRDT
Rotten tubers per plot counting number
A.Amele
IITA
A.Amele
IITA
Average tuber weight computation in kg
like extremely
5
A.Amele
IITA
Corm estimation binary 0&1
Twining habit estimation 0-1
TWNH
A.Amele
IITA
TUBSHA
IITA
Tuber shape estimation 1-4
A. Lopez-Montes
IITA
Cormsize
Corm size estimation 1-3
A.Amele
Sett-N
A.Amele
Tubers planted counting/plot
IITA
A.Amele
Seeds germination start time estimation in yy/mm/dd
DAFGR
IITA
SPRTL
A.Amele
IITA
Sprout length measurement in cm
IITA
TBR_Hairy
A. Lopez-Montes
Hairiness of tuber estimation 1-3
no thorns or spines on tuber surface
0
Off-white
2
2
dislike
A.Amele
IITA
Number of internodes to first branching computation/plot
A. Lopez-Montes
VRSI
Virus incidence computation %
IITA
D.Cornet
Cirad
Tuber flour starch content computation
Dayendflr
A. Lopez-Montes
End of flowering time computation in days
IITA
A. Lopez-Montes
PLNV
IITA
Plant vigor estimation 1-3
IITA
Leaf beetle damage incidence computation %
Btl_I
A. Lopez-Montes
A.Amele
Weight of small tuber per plant computation kgplant
IITA
IITA
MTWPL
Weight of big tubers per plant measurement in kg
A.Amele
Total tuber weight per plot computation in kg
IITA
A.Amele
YamMoul_Meas_0to10
Pounded yam mouldability scale 0-10
Bolanle Otegbayo
Bowen University, Nigeria
Emerday
A.Amele
IITA
First sprout emergence time computation in days
D.Cornet
Cirad
Senescence earliness computation in days from median emergence to 5% senescence
TUBSIZE
IITA
Tuber size estimation 1-3
A. Lopez-Montes
Pounded yam smoothness scale 0-10
Bolanle Otegbayo
YamSmot_Meas_0to10
Bowen University, Nigeria
A. Lopez-Montes
fruit set number percentage
IITA
strong or hard or lumpy
1
A. Lopez-Montes
IITA
Seeds set/fruit computation
3
soft or smooth
Presence of tuber dry rot estimation in 0&1
A.Amele
IITA
Medium tuber width computation in cm
A.Amele
IITA
Mtbrwidth
IITA
Bulbil yield per plant measurement in kg
AetbrwtPl
A.Amele
5
like extremely
5
Medium mouldability
Sprout hairiness estimation nominal 0&2
A.Amele
IITA
Botseed
A.Amele
IITA
True seeds harvested/cross counting
sder
A. Lopez-Montes
Seedling establishment rate percentage
IITA
IITA
Tuber flesh texture estimation 1-3
A.Amele
IITA
Big tubers per plant computation
A.Amele
6
creamy
Color_BY
Boiled yam color estimation 1-5 scale
A.mele
IITA
26-50% tuber skin showing symptoms
2
1
1-25% tuber skin showing symptoms
Boiled yam crumbness scale 0-100
Laurent Adinsi
FSA-UAC, BÃˆnin
TBRL
Average tuber length measurement in cm
A.Amele
IITA
Low (flowering is scare with the presence of few flowers mostly less than 10 inflorescences per plant)
3
A.Amele
IITA
Lower surface leaf hairiness estimation 0-2
0
Big lumps
Spines on stem estimation 0-2
IITA
A.Amele
A.Amele
IITA
Fruit maturity time estimation in yy/mm/dd
Average tuber width computation in cm
tbrwidth
IITA
A.Amele
Number of dry rot tubers count
A.Amele
IITA
A.Amele
Pollmech
IITA
Pollination type estimation 1-4
1
dislikeextremely
A.Amele
Crossing date esimation in yy/mm/dd
IITA
Polldate
D.Cornet
Cirad
Starch grain size computation
IITA
M_Bi
A. Lopez-Montes
Mealybug incidence computation %
0
Not streachable
Laurent Adinsi
Boiled yam stickness scale 0-100
FSA-UAC, BÃˆnin
yam anthracnose disease severity estimation in 1-5
A. Lopez-Montes
IITA
AnthracSev
A.Amele
DFM
IITA
Times to fruit maturity computation in days
5
Medium (50% of the plants are still green or on the onset of senescence. Only 50% plants in a plot with 25% of the leaves showing senescence or slight yellowing
IITA
A. Lopez-Montes
SPCOLO
Sprout color estimation 1-5
A. Lopez-Montes
VRSS
IITA
virus severity estimation in 1-5
Laurent Adinsi
Boiled yam bitterness 0-100
FSA-UAC, BÃˆnin
100
Purple
A.Amele
Tuber thorniness intensity estimation 0-7
IITA
Tuber beetle incidence computation %
A. Lopez-Montes
IITA
Tbeti
3
Anthracnose symptoms covering ~26 t0 ~50% of the plant. One or two spots of more than 1 cm diameter width, and dry tissue on the leaf surface. Small dark and no dried spots with more than 1 cm width, are present
Txt_PY
A.mele
Pounded yam texture estimation 1-3 scale
IITA
A.Amele
IITA
Smoothness estimation 1-3
Bitter
100
A.Amele
IITA
Emerged plants counting/plot
0
Abesnt
A. Lopez-Montes
IITA
Con_Stick_PY
Stickiness estimation 1-3
5
like extremely
Growth cycle length computation in days between 5% emergence and 95% senescence
D.Cornet
Cirad
dislikeextremely
1
IITA
A.Amele
Crazy roots presence estimation 0&1
A.Amele
IITA
Big tuber average weight computation in kg
1
Few
Canopy
A. Lopez-Montes
IITA
Canopy architecture estimation 1-4
Small tubers per plant compuatation
A.Amele
IITA
0
Easy to cut
A.Amele
Mature leaf color estimation 1-5
IITA
Root position estimation 1-4
A.Amele
IITA
Tuber flour sugar content computation
D.Cornet
Cirad
female flower
2
Rough
2
0
No
DF
Flowering time computation in days
A.Amele
IITA
fflrab
Female flowering intensity per spike estimation 1-4
A.Amele
IITA
7
brownish white
A.Amele
Weight of medium tubers per plant computation kgplt
IITA
IITA
Aetubwtp
A.Amele
Bulbil weight per plot measurement in kg
IITA
Leaf width measurement in cm
A.Amele
Creamy white
2
1
Male flower
A.Amele
IITA
Stem height measurement in m
Intensity of tuber flesh oxidation estimation 0-3
A.Amele
IITA
D.Cornet
Cirad
Number of nodes carrying cataphylles before first true leaf counting/plant
Small tubers per plot counting number
A.Amele
IITA
5
Severe necrosis and death of the plant. Coalesced spots with dry tissue more than 1.5 cm of diameter and covering a great proprotion of the leaf surface. Yellowing of the gree tissue is generalised in the leaf blade.
Upper surface vein color estimation 1-4
A.Amele
IITA
IITA
Taste_BY
Boiled yam taste estimation 1-5 scale
A.mele
A. Lopez-Montes
IITA
R_kns
Root knot nematode severity estimation in 1-5
Lower surface vein color estimation 1-4
IITA
A.Amele
like extremely
5
A.Amele
Big tubers per plot counting number
IITA
A. Lopez-Montes
IITA
Flcolr_tail
Tuber flesh color lower portion estimation 1-9
100
Easy
Weight of rotten/diseased tubers per plot measurement in kg
Rot_Wt
A. Lopez-Montes
IITA
Young leaf color estimation 1-5
A.Amele
IITA
Tuber flour protein content computation
D.Cornet
Cirad
Fruit development status estimation 1-2
A.Amele
IITA
A.Amele
First inflorescence initiation time estimation in yy/mm/dd
IITA
4
like
A.Amele
frtform
Fruit setting estimation 0&1
IITA
Light brown
8
3
Neither like nor dislike
0
Difficult
IITA
AnthracInc
A. Lopez-Montes
yam anthracnose disease incidence computation %
IITA
Big tuber yield adjusted computation in t/ha
A.Amele
A.Amele
IITA
cormsep
Separability of corm estimation binary 0&1
2
Slightly bitter
Seedling survival rate percentage
A.Amele
IITA
Medium stretchability
5
A.Amele
Tuber flesh color measurement
IITA
Tbrflcolr
Fully smooth
4
A.Amele
IITA
Leaf density estimation 1-7
A.Amele
IITA
Internode length computation in cm
INODL
Many thorns or spines on tuber surface
7
A. Lopez-Montes
Tuber beetle severity estimation in 1-5
IITA
Tbets
orange
9
10
Mouldable
NPOLS
A. Lopez-Montes
IITA
Pollinated spikes counting
A.Amele
Leaf position estiamtion 1-3
IITA
A.Amele
IITA
Oxid
Tuber oxidation estimation 1-3
Grey
3
Leaf beetle damage severity estimation in 1-5
Btl_S
A. Lopez-Montes
IITA
A.Amele
IITA
Small size tuber length computation in cm
Bowen University, Nigeria
Pounded yam stretchability scale 0-10
YamStr_Meas_0to10
Bolanle Otegbayo
Flowering intensity estimation 0-9
FLRI
A. Lopez-Montes
IITA
A.Amele
IITA
Time to first leaf emergence computation
D.Cornet
Cirad
Emergence vigor computation in number of days between 5% and 95% sprouts emergence
A.Amele
IITA
Total tubers per plot computation
FSA-UAC, BÃˆnin
Boiled yam brownness scale 0-100
Laurent Adinsi
2
slightly sticky
IITA
End of seeds germination time estiamtion in yy/mm/dd
A.Amele
DAEGR
A. Lopez-Montes
Tuber thorniness estimation 0&1
IITA
Thorn
Very Late (all the plants in a plot still show green foliage (green leaf and vine)
1
Laurent Adinsi
FSA-UAC, BÃˆnin
Boiled yam fibrousness scale 0-100
1
Smooth
Medium stickiness
5
IITA
No_stdh
A. Lopez-Montes
Plant stand harvested count
IITA
A.mele
Boiled yam texture estimation 1-5 scale
Txt_BY
A. Lopez-Montes
Dry matter content percentage
IITA
TDMC
IITA
Fiber estimation 1-2
A.Amele
FSA-UAC, BÃˆnin
Boiled yam black spots presence scale 0-100
Laurent Adinsi
IITA
A. Lopez-Montes
Big tuber yield computation in t/ha
0
Absent
Seed index computation 0 to 1
A.Amele
IITA
IITA
Vine cuttings planted count
A.Amele
Medium tubers per plot counting number
A.Amele
IITA
D.Cornet
Cirad
Latency period duration computation in number of days from planting to 5% sprouts emergence
No fibers
0
0
No symptoms
Fruits harvested per cross counting
A. Lopez-Montes
IITA
Matfrt
Tuber flesh whiteness computation
D.Cornet
Cirad
0
No purple
Cormtype
A.Amele
IITA
Corm type estimation 1-3
IITA
Tuber surface crack estimation 0-3
A.Amele
A.Amele
IITA
Medium tubers per plant computation
A.Amele
Upper surface leaf hairiness estimation 0-2
IITA
oxidizes between 1 and 2 minure after cutting
2
Purplish green
4
1
oxidizes less than a minure
Laurent Adinsi
Boiled yam chewingness scale 0-100
FSA-UAC, BÃˆnin
absence
0
Tuber flesh yellowness computation
D.Cornet
Cirad
Pounded yam hardness scale 0-10
YamHar_Meas_0to10
Bolanle Otegbayo
Bowen University, Nigeria
Heterophylly presence estimation nominal 0&1
D.Cornet
Cirad
Stem hairiness estimation 0-2
A.Amele
IITA
A.Amele
Leaf apex shape estimation 1-3
IITA
A.Amele
Time to 50% foliage senescence computation in days
IITA
DM
Time to 50% foliage senescence estimation in yy/mm/dd
A.Amele
IITA
DATS
like
4
A.Amele
IITA
Number of leaves per plant count
A. Lopez-Montes
IITA
Tuber surface texture estimation 1-2
1
sticky
Brown
9
Estbp-ratio
A.Amele
IITA
Field establishment rate compuation in %
YamStic_Meas_0to10
Bolanle Otegbayo
Bowen University, Nigeria
Pounded yam stickness scale 0-10
A.Amele
Plant type estimation 1-3
IITA
GH
dislike
2
51-75% tuber skin showing symptoms
3
0
Very soft
Spine base color estimation nominal 0&1
IITA
A.Amele
0
Not crumby
Mealybug severity estimation in 1-5
A. Lopez-Montes
IITA
M_Bs
FSA-UAC, BÃˆnin
Boiled yam sweetness 0-100
Laurent Adinsi
A.mele
Boiled yam appearance estimation 1-5 scale
IITA
Appearance_BY
Intensity of tuber flesh oxidation computation
Cirad
D.Cornet
Tuber yield adjusted computation in t/ha
IITA
A.Amele
100
High
Very hard
10
A.mele
IITA
Pounded yam appearance estimation 1-3 scale
Appearance_PY
AeTuber
A. Lopez-Montes
Bulbil presence estimation 0&1
IITA
regular
1
2
dislike
Estbp-N
A.Amele
Established plants counting/plot
IITA
Pollinated florets counting
IITA
A. Lopez-Montes
IITA
Spines on sprout presence estimation nominal 0&1
A.Amele
Yam ontology
intermediate
2
Light yellow
6
Spherical
1
Fruit set number estimation 1-3
A. Lopez-Montes
IITA
FRTINT
FSA-UAC, BÃˆnin
Boiled yam odour scale 0-100
Laurent Adinsi
5
very sweet
4
like
100
Granular
3
Neither like nor dislike
Absent
0
acronym
A. Lopez-Montes
IITA
Flcolr_middle
Tuber flesh color middle portion estimation 1-9
Aetbrshap
A.Amele
IITA
Shape of bulbil estimation 1-4
IITA
First leaf emergence time estimation in yy/mm/dd
A.Amele
7
Profuse (plant producing many more flowers mostly 30 to 50 inflorescences per plant)
A.Amele
IITA
Senescence class estimation 1-9
MatC
IITA
Dayaetbrin
Times to bulbil initiation computation
A.Amele
A.Amele
IITA
Big tuber length computation in cm
FSA-UAC, BÃˆnin
Boiled yam bitter after taste 0-100
Laurent Adinsi
IITA
Medium size tuber length computation in cm
A.Amele
Boiled yam purpleness scale 0-100
Laurent Adinsi
FSA-UAC, BÃˆnin
D.Cornet
Cirad
Tuber flesh brownness computation
A.Amele
IITA
Flesh oxidation color estimation 1-4
4
76-100% tuber skin showing symptoms
IITA
Twining direction estimation 1-2
A. Amele
Strepdym
Springness estimation 1-2
A.Amele
IITA
5
Purple
Yellowish
1
Few anthracnose spots or sysmptoms on 1 t0 ~25% of the plant. One or two spots of less than 1 cm diameter width, and dry tissue on the leaf surface
2
1
Yes
Flower initiation time estimation in yy/mm/dd
A. Lopez-Montes
IITA
DtFlrin
Boiled yam whiteness scale 0-100
Laurent Adinsi
FSA-UAC, BÃˆnin
Neutral
3
Crop vigor computation in days from median emergence to 80% of maximum ground cover
D.Cornet
Cirad
Absent
0
Emerdt
IITA
A.Amele
First sprout emergence time estimation in yy/mm/dd
Laurent Adinsi
FSA-UAC, BÃˆnin
Boiled yam granuleness 0-100
IITA
Seeds germinated counting
A.Amele
9
very early (The plants are completely senescent, yellowing is complete and uniform (both leaves and vines 100% senescence)
Small tuber width computation in cm
A.Amele
IITA
Stbrwidth
A. Lopez-Montes
IITA
Fower initiation time computation in days
Dayflrin
IITA
Plant sex estimation 0-4
A.Amele
flrsex
plntsex
D.Cornet
Cirad
Tuber flesh color computation
Sweet
100
Maximum ground cover computation in %
D.Cornet
Cirad
1
aborted flower. Presence of small or rudimentary inflorescences/flowers that can show an abortion or abscission point at joint of the pedicel
Fruits developed per cross counting
A. Lopez-Montes
FrtN
IITA
GR
IITA
Seed germination rate percentage
A. Lopez-Montes
Internode length measurement in cm
A.Amele
IITA
Duration of heterophyllic period computation in days after planting
D.Cornet
Cirad
A.Amele
IITA
Total tubers per plant computation
A. Lopez-Montes
Dorm
Tuber dormancy period estimation
IITA
Irregular
4
Absent
0
IITA
A.mele
Boiled yam aroma estimation 1-5 scale
Aroma_BY
dislikeextremely
1
Leaf length measurement in cm
A.Amele
IITA
IITA
Aetbrp
Bulbils per plot count
A. Lopez-Montes
Light grey
4
Present
100
Cream
5
very attractive
3
Present
1
Aroma_PY
pounded yam aroma estimation 1-5 scale
A.mele
IITA
IITA
SETW
A. Lopez-Montes
Weight of planted tubers computation/ gm
0
Not granular
Boiled yam hardness scale 0-100
FSA-UAC, BÃˆnin
Laurent Adinsi
A.Amele
Leaf shape estimation 1-7
IITA
4
sweet
Foliage senescence time estimation in yy/mm/dd
DateHS
A.Amele
IITA
Sticky
100
Stbrwt
A.Amele
IITA
Weight of small tubers per plot measurement in kg
D.Cornet
Cirad
Earliness of emergence computation in number of days from planting to 50% sprouts emergence
A.Amele, A. Lopez-Mentes
Ratiosp
IITA
Proportion of emerged plants (sprouts) computation/%
Flcolr_head
Tuber flesh color upper portion estimation 1-9
A. Lopez-Montes
IITA
like
4
Yellow
7
IITA
Fruit setting time estimation in yy/mm/dd
A.Amele
TubYld
Total tuber yield computation in t/ha
A.Amele
IITA
Thorny (small prominences ending in a small thorn)
3
Pale green
2
5
Intermediate
Purple
4
Stem color estimatiion 1-5
A.Amele
IITA
100
Difficult to cut
9
Extremely pofuse (plant producing with abundant flowring mostly more than 50 inflorescences per plant)
No brown
0
D.Cornet
Cirad
Senescence period duration computation in days between 5 and 95% senescence
Hairy (few scattered or many roots in the surface of the tuber)
2
Low
3
Purplish white
5
yam starch breakdown RVT
A.Amele
IITA
Fibers
100
early (The plants have senescent foliage (75% of the plants in a plot with 50% leaves showing sign of yellowing but the vines still green)
7
Scale insect infestation estimation 0-2
A.Amele
IITA
1
White
3
Late (75% of the plants in a plot with still green foliage but few plants (upto 25% plants in a plot) showing up to 25% of leaves senescence
No flower or bud. No inflorescence and not flowering at all
0
A. Lopez-Montes
IITA
Taste estimation 1-5
Con_Taste_PY
Low
0
Foliage senescence time computation in days
A. Lopez-Montes
IITA
DAYHS
3
Dark green
Tuber color uniformity computation
D.Cornet
Cirad
Many
2
5
highly irregular
10
Absence of lumps
Bulbil initiation time estimation in yy/mm/dd
Aetbrin
A. Lopez-Montes
IITA
1
Rough
3
oxidizes more than 3 minutes
Crumby
100
0
Absent
entity
2
moderately attractive
Brown
100
Neither like nor dislike
3
Maturity time estimation GGD
IITA
A.Amele
3
Yellow
A. Lopez-Montes
Bulbil yield estimation in t/ha
IITA
AetbrYld
A. Lopez-Montes
S_Brs
Tuber dry rot severity estimation 0-4
IITA
slighty irregular
3
100
Pure white
Vine cutting establishment rate percentage
A.Amele
IITA
3
Cylindrical
no oxidization
0
8
deep purple
0
Off white
Very stretchable
10
Not sticky
3
Non flowering
0
attribute
Not mooldable
0
Long (More than 50% of the tubers sprouted at three month after harvesting time)
4
0
Non sticky
very bitter
1
presence
1
3
Monoecious male (m>f)
Very sticky
10
7
High
Moderate (producing some flowers mostly 10-29 inflorescences per plant)
5
1-5 scale
YamHdMoul
Pounded yam
Pounded yam mouldability/cohesiveness
Mouldability/cohesiveness
Ability of the pounded yam to stick together easily without disintegrating or cohesive and being easy to mould.
Tuber flesh brown index computation from standardized image L*a*b* values
Compute the brown index based on the flesh surface color of tuber longitudinal section using image analysis with a color correction based on a custom color chart
Big size tubers weight per plot
Weight of big size tubers ( ?1 kg) in a net plot or unit area
BTW
Big tuber
Weight
Observe the appearance (structure and pigmentation) of boiled yam and make visual score using scale how attractive or appealing on table or plate to eat
Appearance of boiled yam-Estimation
Small size tubers per plant
Number of small size tubers ( <0.5kg) per plant
Small tuber
Number
NSTPL
Number
Number of tubers harvested per plant
TNTPL
Total tubers per plant
Tuber
Property related to the number of chews necessary to swallow the product
Ease of chewing
BoilYamMthChew
Boiled yam easiness to chew
Boiled root
Big size tubers fresh weight per plot- measurement
Record the weight of big size ( ?1 kg) tubers in a net plot
texture
Boiled yam texture
The physical attributes of boiled yam such as soft or hard/strong , smooth or lumpy when sensed by touch in mouth or with hands
Boiled yam
txtboiledyam
Sprout
Latency before emergence
Period duration from planting to first sprouts emergence
Elapsed time between planting date and date of 5th percentile emergence sprouts in a plot
RDTW
Weight of rotten/diseased tubers
Weight
Rotten tuber weight
Rotten Tuber
Pounded yam aroma
arompoundedyam
The sense of smell or odor of pounded yam that reaches the nose before eating or the pounded yam reaches the mouth
Pouned yam
aroma
Tuber flesh yellow index computation from standardized image L*a*b* values
Compute the yellow index based on the flesh surface color of tuber longitudinal section using image analysis with a color correction based on a custom color chart
Length of time toward crop maturity
Mat
Maturity time
Plant
Time to maturity
uniteless
Fruit set number - Computation
Compute the fruit set number as proportion of pollinated flowers developing or setting a fruit and expressed in %
Leaf shape-Estimation
Record leaf shape of mature plants in a plot
Duration between 5 and 95% senescence of subplot - Computation
Averaged senescence period duration expressed in days between 5 and 95% senescence (i.e. 95% and 5% of maximum ground cover after time to maximum ground cover) in two subplots.
Ground cover computed from weekly images analysis.
Time at 95% and 5% of maximum growth after time at maximum growth computed via inverse regression of time to event Beta ground cover dynamic model.
Fruit harvesting time- Estimation
Record the date of fruits harvest in a crossing block or from plant
Record time in minutes lasted for cut tuber flesh to become or not oxidized and score in scale
Tuber oxidation-Estimation
Width of small size tubers-Computation
Measure the width of at most five small size tubers (<500 gm) from net plot at wider portion of the tuber using calliper or measuring tape and record the average
Txf
Texture of tuber flesh
texture
Tuber flesh
Tuber flesh texture
Vine cuttings planted -counting
Count the numeber vine cuttings planted
Whiteness scale 0-100
Fruits/cross
Starch grain size
Mean starch grain size of yam tuber flour
Size
yam flour
Measure the width of at most five medium size tubers (?500 gm and <1kg )from net plot at wider portion of the tuber using calliper or measuring tape and record the average
Width of medium size tubers-Computation
Tuber dry rot incidence - Computation
Compute the proportion dry rot tubers from the total number of harvested tubers per effective plot
Time to fruit setting
Times fruit formation or set on monoeciuse or femal flowers of dioeciouse yam plants
Fruit
Fruiting ability
Frtset
Visual assessment of spines on a stem (vine) above the base of mature plants in a plot
Density of spines on stem base of a plant-Etimation
Score the smoothnessof the pounded yam , i.e., absence of lumps by finger feeling and using intensity scale
Smoothness of pounded yam- Estimation
fruiting ratio
Fruit index is an estimation of pollinated flowers developing physiologically mature fruits
Fruit
Fruit index
Small size tubers weight per plot
Small tuber
STW
Weight of small size tubers ( <0.5kg ) in a net plot or unit area
Weight
Bulbil shape-Estimation
Record shape of bulbils or aerial tubers in scale
cortyp
Corm
Corm type
Corm type
Type
Compute the average tuber width of all size measurement taken in a net plot
Tuber wideth-computation
Tuber
Dryrot
Yam tuber dry rot incidence
Dry rot caused by nematodes (Scutellonema bradys and Practylenchus spp.) in tubers at harvest
Dry rot incidence
number of fruits
Fruit maturity time - Estimation
Record the date 90% of the developed fruits shows sign of physiological maturity (turning brown)
plant per plot
hairiness
Leaf
llfhair
Leaf hairiness
Hairiness of leaf surface
Smoothness scale 0-10
Length of leaf
lflngth
length
Leaf
Leaf length
weight
Total fresh weight of all category or size tubers per plant
TTWPL
Total tuber weight per plant
Tuber
Record date 50% of sprouts in a plot emerged
Time 50% of sprout emergence-Estimation
Score the presence or absence of ?ber strands on pounded yam
Presence of fiber strand-Estimation
0-1 binary scale
Count the number of tubers (seed yams or setts) planted per plot (unit area)
Tubers (seed yams or setts) planted - Counting
Period from planting to 5% emergence
Computation of the necessary time before 5% emergence using after-fitting inverse regression of log-logistic time-to-event modeling of weekly sprout counts expressed in days after planting
TIMFlrin
Flower initiation time
Time of the first flower initiation on a plant/s in a plot or any of the plants in a plot shows the first flower
Plant
Time to flower initiation
Odour method
Take a whiff and evaluate the intensity of yam odour
Score the sticknes or adhesiveness of pounded yam to consumern fingur using sensory test panelist
Stickiness of pounded yam - Estimation
Computing the number of days required from 50% of sprout emergence to when plant does not produce more new flowers.
End of flowering time - Computation
Compute the ∆E2000 bewteen mean tuber flesh color computed from standardized image L*a*b* values at cutting and 15 minutes latter
Color difference bewteen mean tuber flesh color computed from standardized image L*a*b* values at cutting and 15 minutes latter
Count the emerged plants (sprouts) per plot every week starting from first plant/sprout emergence date till the last plant or spourt emerge in a plot
Emerged sprouts -Counting
Compute the proportion or ratio of plants/sprouts emerged as the number of emerged plants/sprouts divided by the total number of tubers (seed yam or setts) planted in a plot multiplied by 100
Emerged sprouts or plants proportion-Computation
TIMinflor
Time of first inflorescence initiation
Inflorescence initiation time
Plant
Inflorescence initiation time
Springiness of pounded yam-Estimation
Score the distance to which the deformed material can be or degree of stretchabiliy pounded yam in intesity scale
Medium size tubers per plant-computation
Compute the number of medium size tubers produced per plant using the formula number of medium size tuber in a plot divided by the total number of harvested plants
days
status
Status of fruit development
Fruit development status on monoecious and female flower of dioeciouse yam plant
FrtDev
Fruit
Compute the ∆E2000 between average tuber flesh color computed from standardized image L*a*b* values and tuber flesh color of individual pixel values
Mean color difference between average tuber flesh color computed from standardized image L*a*b* values and tuber flesh color of individual pixel values
Sensory test of how soft or hard, smooth or lumpy when pouned yam sensed during mastication in mouth or feeling with hand
Texture of pounded yam-Estimation
Bulbil yield
Aerial tuber
Yield of vine bulbils or aerial tubers harvest
Yield
Bulbyld
Whiteness
Boiled yam whiteness
BoilYamWhit
Both inner and outer colour can range from light yellowish (off-white) to white (pure white)
Boiled root surface
%
Dry rot caused by nematodes (Scutellonema bradys and Practylenchus spp.) in tubers at harvest
Yam tuber dry rot severity
Dry rot severity
Tuber
Dryrot
Tendency of climbing or trailling
TWNH
Plant
twining habit
Twining habit
TastePndedYam
Pounded yam
Taste of pounded yam
taste
Taste of pounded yam when eaten without any additional complementary food
1-3 scale
Twining direction
twndir
Twining direction
Vine
twining direction
Assess the small or odour the pounded yam that sensed at the nose before the yam reaches mouth and make sensory score using scale how appetizing or appealing the pounded yam to eat
Aroma of pounded yam-Estimation
Tuber
Root knot incidence caused by Meloidogyne spp.
RKNInc
Root knot nematode damage incidence
Root knot nematode incidence
Proportion
Fruit set
Fruit set number
NFrtSet
Intensity or proportion of fruit set or development under open or controlled pollination.
Small size tuber length
Stbrleng
Small tuber
Length
Average length of small size tubers harvested in a net plot or unit area
Assess the proportion of sprouted tubers at different time interval (once a week) from harvesting up to three months after harvesting and rate the dormancy period in scale
Dormancy period -Estimation
Texture in the hand method
After breaking or cutting, breaking or crumbling, evaluate the intensity of fine fibers between the fingers and visible to the eye
Canopy
Growth vigor
Crop vigor
Duration from median emergence to 80% of maximum ground cover
Small tuber
NSTP
Number
Number of small size tubers that weighing <0.5kg in a net plot or unit area
Small size tubers per plot
Texture of boiled yam-Estimation
Sensory test of how soft or hard, smooth or lumpy when boiled yam sensed during mastication in mouth or feeling with hand
Presence of spines on sprout (vines)
Spines on sprout presence
Spine on sprout
Presense
SPNSP
kg/plant
Viruses infection incidence - Computation
Compute the proportion of virus symptomatic individuals or their parts or commonly the portion of plant units in a plot. Take virus incidence recording thrice: First inspection at 8 to 10 weeks after planting and second inspection after 4 to 6 weeks after first inspection for virus symptoms and the third and final inspection 4 to 6 weeks after the second inspection .
Measure the length and width of tuber using measuring tape and record the length /with ratio
Colour scale 1-9
Shape of tuber - computation
After swallowing, observe the feeling or sensation of the bitter taste on the tongue and assess its intensity
Taste method
Observe relative or absolute area of plant tissue affected by yam anthracnose disease and record the severity as a proportion or percentage of plant surface affected.It is visual score in scale under screenhouse, artificial inoculation or under field natural infestation. For artificial inoculation use a suspension of three most virulent strains of Colletothrichum gloeosporioides and inoculate the plants raised from vine cutting in vertical sack or other means by spraying. For natural infestation, scores can be taken 10 to 12 weeks after planting and second scoring about 4-6 weeks before harvesting . Artificial inoculation should be scored at 3 days after inoculation(DAI) , and repeated at 7DAI, 11DAI and 15DAI
Anthracnose severity - Estimation
Record the number of true seeds sown per cross or family
Number of true seeds sown-counting
Spines on stem density
Intensity of spines on stem (vine) above base of mature plant (5 to 6 month old plant)
Spine
SPNAB
density
gm/sett
Tuber
Tuber beetle severity
Tuber beetle severity
Tubtlsev
Severity of tuber beetle damage.
0-1 scale
Medium tuber
Number
NMTPL
Medium size tubers per plant
Number of medium size tubers (? 0.5kg and <1 kg) per plant
Number of bulbil - Computation
Count number of aerial tubers or vine bulbils on plants in a net plot and compute the average number bulbils per plant
Sample is pressed firmly between the fingers
Texture in the hand smoothness method
Mealybug tuber incidence - Computation
Compute the proportion tubers infested with mealybugs from the total number of harvested tubers per effective plot at time of harvesting.
Presence of bulbil - Estimation
Record the presence and absence of bulbils (aerial tubers) in the vines of yam plant
Bulbil yield (fresh weight) per plant-computation
Compute the weight to harvested bulbils per plant
Count the number of branches above ground on at least five mature plants in a plot and record the average
Number of branchs - computation
Assess the fruit number as fruiting intensity in categorical scale when more than 50% of the plants set fruits
Fruit set number - Estimation
Crazy roots presence on tubers at harvest-Estimation
Record appearance of crazy roots on tuber surface at harvest
Brown colour of product after cooking
Brownness
BoilYamBrow
Boiled root surface
Boiled yam brownness
1-5 scale
Corm
separation
corsep
Corm separability from tuber
Corm separation from tuber
Scalisec
Scale insect infestation on tubers at harvest
scale insect infestation
Scale insect infestation
Tuber
number of fruit
Compute the proportion of plants with leaf beetle damage from the total number of plants in the effective plots on leaf beetle damange record taken twice(at two and five months after planting date)
Leaf beetle incidence - Computation
Appearance
Tuber surface look in relation to presence or absence of roots, thorns and sprouted buds on the tuber surface
Tuber
Tuber appearance
Tbrappr
TIMSE
Plant or sprout
50% emergence time
Time to 50% sprouts (plants) emerge in a plot
50% sprout emergence time
Mealybug tuber severity - Estimation
Mealybug tuber severity estimation on infested tubers at time harvesting
Record the fresh weight of harvested bulbil or aerial tuber per net plot
Bulbil yield (Plot weight) - Measurement
Leaf hairiness - Estimation
Assess hairiness of leaf surface (lower part)
Observe the regularity of tuber shape in visual scale
Shape regularity - estimation
Mouldability scale 0-10
Observe the optical color or pigementation of boiled yam and make visual score using scale how acceptable or appealing on table or plate to eat
Color of boiled yam-Estimation
Anthracnose incidence - Estimation
Compute the proportion of anthracnose damaged individuals or their parts , commonly the portion of plant units in a plot. Count anthracnose disease ?blight? or leaf spot affected plants in plot twice (First inspection at 10 to 12 weeks post planting and second inspection after 2 to 4 weeks before harvesting ) and compute the proportion of damanged
Count the number of tubers in a plot weighing ? 500 gm and <1 kg harvested per effective plot
Medium size tubers harvested number- counting
Record time (date) 50% plants in a plot are having at least one flower/inflorescence
50% flowering time - Estimation
Measure the length of at most five small size tubers (<500 gm) from base to tip in a net plot at harvest and record the average
Length of small size tubers-Computation
Proportion of established plants
Proportion of plants in a plot well established (plantsgrowing with good vigour and without severe constraints)
STRATE
Proportion
Plant
Compute average of the number of stems (vines) per established plants in a plot
Number of stems per plant-computation
Reaction of the total plants per plot to the virus infection, producing yellow mottle, mosaic and leaves deformation
Plant
VirusInc
Virus incidence
Virus incidence
Stem color - Estimation
Record the predominant color of stem on mature plant at five to six month after emergence using a five color scale
0-4 scale
Record date when plant/s having the first inflorescence in a plot
First inflorescence time - Estimation
Observe and record the fresh cut flesh surface color at the middle part of the tuber at harvesting time.
Tuber flesh color middle portion - Estimation
Softness is when it is quite easy to compress the sample, while hardness is when force is used to compress the sample or takes effort to compress the sample
YamHdHar
Pounded yam
Pounded yam hardness
Hardness
Sprout
Spleng
Length of sprouted shoots (vines)
Sprout length
length
Seedling transplant survival rate
Seedling
Survival rate
Tsurvrat
Establishment rate of seedlings four weeks after transplanting operation
Tuber flesh white index computation from standardized image L*a*b* values
Compute the white index based on the flesh surface color of tuber longitudinal section using image analysis with a color correction based on a custom color chart
Take count of the number of seeds set on each fruits and record the average seeds per fruit
Seeds set - Comp
Compute the number of big size tubers produced per plant using the formula number of big size tuber in a plot divided by the total number of harvested plants
Big size tubers per plant-computation
1-3 general scale
Tuber hairiness
hairiness
RTBS
Presence of secondary roots on the tuber bark
Tuber
Tuber flesh oxidation intensity-Estimation
Score the intensity of tuber flesh oxidation (flesh surface color change) at different time interval (0, 30, 60, 180 minutes after cutting) using scale
Record corm size in relation to tuber size using three scale
Corm size-Estimation
Observe the femal flowering intensity or abudance per inflorences and rate
Femal flowers abundance or intensity per inflorescence-Estimation
Growing degree days to maturity-Estimation
Compute number of growing degree days required from planting (or 50% emergence) to 50% foliage senescence or maturity.
Measure the weight of N planted tubers (seed yams or setts) and record the average
Setts or seed yams planted weight - Computation
TIMFrtM
Time to fruit maturity
Times 90% of fruits attain physiological maturity
Maturity time
Fruit
Observe and record the fresh cut tuber flesh surface color at the head portion of the tuber at harvesting time.
Tuber flesh color head portion - Estimation
method_of
Compute the proportion tubers showing root knot nematode symptoms from the total number of harvested tubers in effective plot
Root knot nematode incidence - Computation
A tendency of a plant to grow in a certain shape and to attain a certain mature height and spread
Plntype
Plant type
growth habit
Plant
Anthracnose severity
Yam anthracnose disease severity
YADS
Anthracnose severity caused by the pathogen Colletotricum gloeosporioides. The reaction of plants in a plot to anthracnose infestation (blight or leaf spot) under screenhouse or in the field under natural infestation or artificial inoculation
Plant
Tuber flesh cross section color uniformity-estimation
Record the uniformity of tuber flesh cross-section color using visual scale at fresh cut during harvest
Seedling
sderat
Establishment rate of seedlings
Establishment rate
Seedling Establishment rate
Count the number of tubers in a plot weighing ?1 kg harvested per effective plot
Big size tubers harvested number - counting
Compute the number of days required from date of planting to the date first sprout or plant in a plot or unit area emerged
Times to first sprout emergence-Computation
0-1 scale
Measure the flesh surface color of tuber (head, middle and tail portion) at different time interval (0, 30, 60, 180 minutes after cutting) using colorimeter (a color spectrophotometer) or standard color chart.
Tuber flesh color reading -measurement
Pounded yam stickiness
This is when the pounded yam sticks or adhere to the fingers when it is touched with fingers or during moulding into bolus for swallowing.
Pounded yam
YamHdStic
Stickiness
number of branch
Tuber width
Wideth
Tuber
Average width of all size tubers harvested in a net plot or unit area
Tbrwd
Plant Vigor - Estimation
Visual assessment of the plant vigour in a plot at two month after planting
Medium tuber
Average length of medium size tubers harvested in a net plot or unit area
Medium size tuber length
Mtbrleng
Length
Select at least five random whole tubers from a net plot and cut small slices (1-2 mm) from proximal, middle and distal portion and mixed thoroughly. Record fresh weight and determin dry weight of samples by drying at 70âˆžC for 72 h in a forced air oven. A proportion between the dry weight and the fresh weight is calculated.
Tuber dry matter content - Computation
Ability of pounded yam to stretch when pulled apart with fingers
Pounded yam
YamHdStr
Pounded yam stretchability
Stretchability
Number of internode-computation
Compute average number of internodes to first branching of at least five plants internode counts taken in a plot
shape
Lfshp
Leaf
Leaf shape
Leaf shape of plants
Plant sex
Predominat plant or flower sex
Flower
Sex
sex
Tuber thorniness intensity
Tuber
Intensity of thorns on the tuber surface
ThornInt
Thorn or spine intesity
Fibrousness scale 0-100
Score the degree to which particles of a pounded yam stick together or how moldable it is using intensity scale
Cohesiveness of pounded yam- Estimation
End of flowering time - Estimation
Record time (date) when the plant does not produce more new flowers in a plot
germination starting time
Seeds germination start time
Seed
germstart
Time the first seed germination occurred
bulbil/plant
stmhair
hairiness
Stem
Stem hairiness
Hairiness of stem
Stickness scale 0-10
Computed the yield of bulbil per hectare using the formula.
Bulbil yield (fresh weight) per hectar- Computation
Observe and score scale insect infestation on tuber at harvest
Scale insect infestation - Estimation
Rotten tubers in a plot number-counting
Count the number of rotten and/or diseased tubers in effective plot
Heterophylly duration
Duration from emergence to first true leaf
Mean duration between fisrt emergence and first true leaf apprearance on main stem of 5 plants choosen randomly
Plant
Tuber number/plot
Sample is pressed with the index finger
Tuber shape regularity
Tuber
Regularity of tuber shape
Shape regularity
Texture in the hand hardness method
Surface color resulting of tuber flesh enzymatic oxidation
Oxidation color
Foxdc
Tuber
Tuber flesh oxidation color
Leaf width - computation
Measure the width from the widest part of leaf using a measuring tape on sampled 20 adult leaves ( four leaves per plant on at leat five plants in a plot), and record the average width
Determination of predominant canopy architecture
Canopy architecture - Estimation
Granuliness 0-100
Purple colour tending to pink after cooking
BoilYamPurp
Purpleness
Boiled yam purpleness
Boiled root surface
Measure the length of at most five medium size tubers (?500 gm and <1kg ) from base to tip in a net plot at harvest and record the average
Length of medium size tubers-Computation
Quantity of Female spikes where flowers has been pollinated using male flower from a monoecious or dioecious parent
Inflorescence
number
Pollinated spikes number
NPollSpk
Record appearance of cracks on tuber surface as absent, few and many
Cracks on the tuber surface-Estimation
Sweetness
Boiled yam sweetness
Basic light sugary taste like a little glucose or sucrose in water solution
BoilYamSweet
Boiled root
Count the number of leaves on at least five young plants in a plot at 30 days after emergence and record the average
Number of Leaves - Computation
Secondary sprouting
Emergence of secondary sprouts on a plant
Sprout
SecSP
Secondary sprouting
Whitness of the Flesh colour
The surface whiteness of the yam tuber flesh
Tuber flesh
color
1-3 scale
Observe and record fresh cut tuber flesh surface color at the tail portion of the tuber at harvesting time.
Tuber flesh color lower or tail portion- Estimation
Growth cycle length
Canopy
Growth cycle length
Time between 5% emergence and 95% senescence
1-5 scale
Texture in the hand mouldability method
Cirad
G.Arnau
Sample is put in the hands and moulded
Shape regularity estimation 0-2
Length
Average length of big size tubers harvested in a net plot or unit area
Big size tuber length
Btbrleng
Big tuber
Counting the number of plants where tubers were harvested in a plot
Plant harvested number - Counting
Total tuber yield adjusted-computation
Computed as total tubers weight per plant multiplied by planting density and result divided by 1000
kg/plot
0-9 scale
Compute the sum of all category/size tubers (big, medium, small and rotten/diseased) in a net plot
Total tuber harvested number-computation
Plant
establishment rate
Proportion of vine cuttings established well that producing shoots
Vestrat
Vine cutting establishment rate
Leaf beetle severity
Leaf beetle damage severity
Lfbtsev
Severity of leaf beetle damage.
Leaf
Seed tuber
NTP
Number
Number of seed tubers planted in a plot or unit area
Tubers planted
µm
Observe the appearance of roots, thones and srout buds on surface of harvested tubers and make visual score using scale
Tuber surface appearance - Estimation
Chewingness scale 0-100
Sdsown
Seed sown
Seeds sown
Number
Quantity of botanical or true seeds sown per family or cross
Tuber surface texture - Estimation
Record the smoothness or roughness of tuber skin in visual scale
Compute as the total number of tubers in a net plot divided by the number of harvested plant per net plot
Total tubers per plant-computation
Measure the length from lobes to the tip using a measuring tape on sampled 20 adult leaves ( four leaves per plant and at leat five plants on a plot), and record the average length
Leaf length - computation
Record date the first seed germination observed per cross or family
Time of first seed germination-Estimation
Aerial tuber
Number of bulbil
Number
Number of bulbils or aerial tubers produced
Bulbp
Time to 50% foliage senescence time - Estimation
Record date of 50% plants in a plot are showing foliage senescence
Maximum ground cover
Maximum ground cover
Canopy
Maximum ground cover
Number
Leaf
The number of leaves on a plant
Nlfyp
Number of leaves
Tuber flesh color computation from standardized image L*a*b* values
Compute the average of the flesh surface color of tuber longitudinal section using image analysis with a color correction based on a custom color chart
Record the weight of small size ( < 500 gm) tubers in a net plot
Small size tubers fresh weight per plot- measurement
Observe the status of foliage senescence (leaf or vine yellowing) of plants in plot at 6 month onward and rate the maturity status
Senescence- Estimation
YADI
Anthracnose incidence
Plant
Yam anthracnose disease incidence
Anthracnose incidence caused by the pathogen Colletotricum gloeosporioides. % of anthracnose ?blight? or leaf spotaffected plants in a plot
Count the number of aerial tubers or vine bulbils produced per net plot.
Number of bulbil - Counting
Tuber beetle incidence
Tubtlinc
Tuber
Tuber beetle incidence
Incidence of tuber beetle damage.
Presence or absence of corm on tuber
Presence
Corm on tuber
Corm
corm
Fibrousness in hand
BoilYamHdFibr
Boiled yam fibrousness
Refers to the presence of fine fibers between the fingers and visible to the eye
Boiled root
Tuber beetle severity - Estimation
Tuber beetle severity or intensity estimated usually as number of nymph present in tubers at harvesting time.
Record the degree of thorns or spines on tuber surface in visual scale
Tuber thorniness intensity-Estimation
Average length of all size tubers harvested in a net plot or unit area
Length
Tbrleng
Tuber length
Tuber
Number
Plant
NESP
Number of well established plants ( plants growing with good vigour and without severe constraints) in a plot
Established plants
Averaged crop cover compactness over two subplots images around time of 50% of maximum ground cover.
Ground cover computed from weekly images analysis.
Time at 50% of maximum growth computed via inverse regression of time to event Beta ground cover dynamic model.
Images choosen as near as possible of date of time at 50% of maximum growth .
Compactness computed as the ration between ground cover area (pixels) and its respective convex hull area (pixels).
Ratio between subplot ground cover area and its respective convex hull area - Computation
Total tuber fresh weight per plot -computation
Compute the sum all category or size of tubers (Big, medium, small size, and rotten and diseased) fresh weight per plot
germend
germination ending time
Time last seed germination occurred
Seeds germination end time
Seed
Leaf
Lfden
density
Leaf density
Variation in leaf mass of the plant
NPH
Number of plants harvested
number
Haversted plant
Stand harvested number
number of seed
Cohesiveness of pounded yam
Degree to which particles of a sample stick together or how moldable it is
cohpdym
Cohesiveness
Pounded yam
Dryrot
Yam tuber dry rot incidence
Dry rot caused by nematodes (Scutellonema bradys and Practylenchus spp.) in tubers at harvest
Tuber
Number
Foliage senescence time - Computation
Compute the number of days required from sprout emergence or planting to when all plants had fully senesced
Yam tuber dry rot presence
Dryrot
Dry rot presence
Dry rot caused by nematodes (Scutellonema bradys and Practylenchus spp.) in tubers at harvest
Tuber
Average tuber weight -computation
Calculated as total tuber weight per plot divided by total number of tubers per plot
Seeds germinated
sdgerm
Number
Quanity of sown true (botanical) seeds germinated per cross or family
Seed germinated
cm
Canopy
Senescence earliness
Growth duration
Time from median emergence to 5% senescence
type
Inflorescence type
The arrangement of flowers on stem or twig of a plant
Inft
Inflorescence
Basic bitter taste like small quantity of quinine or caffeine in water
Bitterness
Boiled root
BoilYamBitt
Boiled yam bitterness
germRate
Seed
germination rate
Seed germination rate
A proportion of sown true (botanical) seed which germinate and produce seedling
lfwdt
Width of leaf
Leaf
width
Leaf Width
Medium tuber
Medium size tuber width
Length
Average width of medium size tubers harvested in a net plot or unit area
Mtbrwd
Duration from median emergence to 5% senescence of subplot - Computation
Averaged senescence earliness expressed in days from median emergence to 5% senescence (i.e. 95% of maximum ground cover after time to maximum ground cover) in two subplots.
Ground cover computed from weekly images analysis.
Time at 95% of maximum growth after time at maximum growth computed via inverse regression of time to event Beta ground cover dynamic model.
Tuber flesh color
color
Tbrfclr
The surface color of the yam tuber flesh
Tuber flesh
SprtCol
Color of the sprout (vine and leaves).
Sprout color
Sprout
color
m
NEP
Plant or sprout
Number
Number of an emerged plants (sprouts) in a plot
Number of emerged plants
Calculated as weight of big size tubers per plot divided by total number of big size tubers per plot
Big yam tuber average weight-computation
Plant
Flrint
Abundance or degree of flowering
flowering intensity
Flowering intensity
Put the product between the molars and mash it to assess the number of chews before swallowing
Texture in the mouth method
Taste of boiled yam when eaten without any additional complementary food
taste
Tastebldyam
Boiled yam taste
Boiled yam
Leaf
Arrangement of leaves on stem or vine
arrangement
lfpst
Leaf position
Color or pigmentation of leaf vein
Leaf
Vein color
lveincol
vein color
Colour
The degree of whiteness of the pounded yam sample like a plain white paper or white flip chart/colour of boiled egg albumen, or Colour of the pounded yam comparable to that of Soymilk or “Eba” from white “Gaari”, or colour of Pounded yam comparable to that of greyness covering a boiled egg yolk, or colour of pounded yam, or colour of pounded yam comparable to that of evaporated liquid milk such as Peak milk, or colour of pounded yam comparable to boiled egg yolk that is light in colour, or colour of Pounded yam comparable to deep colour of Yellow maize, or colour of Pounded yam comparable to the colour whole wheat meal or colour of Pounded yam comparable to the colour of carton paper.
Pounded yam
YamCol
Pounded yam colour
0-2 scale
NBTP
Number of big size tubers that weighing ?1 kg in a net plot or unit area
Number
Big size tubers per plot
Big tuber
Earliness of emergence
Sprout
Period duration from planting to 50% sprout emergence
Elapsed time between planting date and date of 50% emergence sprouts in a plot
Virus severity
Plant
VirusSev
Virus severity
Grade of reaction of the plant to the viruses infection, varying from mottle, mosaics until total leaves deformation
Aerial tuber
TIMbulb
Time to bulbil initiation
Bulbil initiation time
duration
Record the abundance or intesity of flowering when more than 50% of the plants are flowered in a plot
Flowering intensity - Estimation
Tuber size
Tuber size
Size
Tuber
TbrSz
Compute by dividing fresh weight measurement of medium size tubers taken to the number of harvested plants in a net plot
Medium size yam fresh weight per plant-computation
NVP
Vine cuttings planted
number
Vine cuttings planted
Plant
Record the weight of medium size ( ? 500 gm and <1 kg) tubers in a net plot
Medium size tubers fresh weight per plot -measurement
Nstem
Stem
Stems per plant
number
Number of stems (vines) with leaves and branches per plant
Date end of seed germination-Estimation
Record date the last seed germination observed per cross or family
Tuber flesh browning
Intensity of tuber flesh enzymatic oxidation (degree of flesh color change or browning of cut yam tuber)
Oxidation intensity
Tuber flesh
TNTP
Number of total (all size) tubers in a net plot or unit area
Total tubers per plot
Tuber
Number
Length
Big size tuber width
Big tuber
Average width of big size tubers harvested in a net plot or unit area
Btbrwd
Fruit development intensity-Estimation
Score the degree of fruit development in scale
Presence of bulbils or aerial tubers in the nodes of the vines
Presence of bulbil
Bulbil
Aerial tuber
Bulbil presence
Compute the proportion or ratio of well-established plants in a plot from the total number of tubers (seed yam or setts) planted
Field establishment-Computation
number of spikes
Observe the arrangement of leaves on stem or vine and rate it
Leaf position - Estimation
Fruits developed number - Counting
Record the number of developed fruits or fruit set in pollinated flowers/inflorescence
weight
Weight of big size tubers per plant
Big size tuber weight per plant
Big tuber
WBTPL
variable_of
1-7 scale
texture
Pounded yam texture
Pounded yam
The physical attributes of pounded yam such as soft or hard/strong , smooth or lumpy when sensed by touch in mouth or with hands
txtpoundedyam
Boiled root
Bitterness after taste
Boiled yam bitter after taste
During chewing, bitter taste after swallowing, eg there is a light bitter aftertaste
BoilYamBitteraft
G.Arnau
The pounded yam is touched and pulled apart with the fingers
Texture in the hand stretchabilitymethod
Cirad
Flesh oxidation quantitative computation
Record time of the first leaf emergence on sprouted shoot (vine)
Time of first leaf emergence on sprouted shoot (vines)-Estimation
Sprout
Hairs on sprout (vines)
hairiness
Sprout hairiness
HAIRSP
Senescence duration
Time between 5 and 95% senescence
Senescence duration
Canopy
Tuber
RKNSev
Root knot nematode severity
Root knot nematode severity
Root knot severity caused by Meloidogyne spp.
kg
Tuber thorniness
Thorniness
Exsistence of thorns on the tuber surface
Thorn
Tuber
Tuber flesh texture-Estimation
Record the texture of tuber flesh using scale
1-5 general scale
Incidence of leaf beetle damage.
Lfbtinc
Leaf beetle incidence
Leaf beetle damage incidence
Leaf
Inflorescence type-Estimation
Observe the type of inflorescence and score it
Crossing date
pollination time
Date crossing or pollination attempted
Plant
datcross
Canopy
Crop folliage compactness
Architecture
Crop cover compactness
TTYNA
Total tuber yield
Total tuber yield nonadjusted tons per hectare
Tuber
yield
First emergence time
TIMFSE
Plant or sprout
First sprout emergence time
Time to the first sprout (plant) emerge in a plot
Nodes carrying cataphylle per plant
Uniformity of tuber flesh surface color in cross-section ( from cortex to center)
color
Utfc
Tuber flesh cross-section color uniformity
Tuber cross section
color
Tuber flesh uniformity
Tuber flesh
Uniformity of tuber flesh surface color in longitudinal section
Internode length - computation
Measure the length of internode at 1m height on five (5) plants and record the average
Medium tuber
Medium size tuber weight per plant
weight
Weight of medium size tuber yam per plant
WMTPL
Yellowness of the Flesh colour
Tuber flesh
The surface yellowness of the yam tuber flesh
color
Purpleness scale 0-100
number
Stem internode
NINFB
Number of internodes to first branching
Number of internodes to first branchs on a plant
ATW
Average tuber weight in kg
Weight
Average tuber weight
Tuber
Compute by dividing fresh weight measurement of all categroy/size tubers taken in a plot to the number of harvested plant in a net plot
Total tuber fresh weight per plant-computation
Taste of boiled yam-Estimation
Feel the taste of boiled yam in mouth and make sensory score using scale how pleasing to the taste
Root knot nematode severity - Estimation
Root knot nematode severity estimation in a range from no symptoms to highly severe galling scored in secondary roots of the plant and tubers adventitious roots.
Big size yam yield adjusted-computation
Calculated as big size yam tuber weight per per plant mutiplied by planting density and result divided by 1000
Score corm status of tubers using a binary scale
Corm on tubers-Estimation
1-3 scale
1-4 scale
TbrSh
Shape
Tuber predominant shape
Tuber
Tuber shape
Foliage senescence time
Datfsen
Senescence time
Plant
Time to all plants in a plot or unit area show full or complete foliage senescence
SdSet
number
Seeds set per fruit
Set seed per Fruit
Number of seeds developed per fruit after hand flowers pollination
Hardness scale 0-10
Dormancy period
Tuber dormancy period
TubDorm
Tuber
Tuber dormancy period
presence
CRZROOT
Crazy roots presence
Appearance of crazy roots on tuber surface
Crazy roots
Refers to the presence of small black points on the surface of product
Boiled root surface
BoilYamBlackspo
Boiled yam surface black points presence
Black points presence
0-3 scale
Computed as total tuber weight per plot divided by size of net or effective harvest plot and result multiplied by 10
Tuber yield no adjusted- Computation
Boiled root
Boiled yam granuleness
BoilYamMthGran
Granuliness in mouth
Refers to the presence of small grains during chewing
Canopy architecture
Canopy
architecture
Canarc
Organisation or structural arrangements of branchs and leaves distribution giving a specific shape to the above ground part of the plant
Stem height - computation
Measure the length or height of stem or vine of at least five mature plants in a plot using measuring tape at five to six months after sprout emergence and record the average
Record of the existance of colored spot at base of spines on a sprout (vine)
Colored spots on spine base-Estimation
Date (yyyymmdd)
Compute the number of days required from date of planting to the date 50% of sprouts or plants in a plot emerged
Times to 50% spout emergence-Computation
Compute the proportion or ratio of vines cuttings survive and producing shoots from the total of planted vine cuttings
Vines established-computation
Assess the color of leaf on a young plant
Leaf color - Estimation
Compute the average sprout length of five representative plants measurement taken in a plot
Sprout length-computation
Smoothness
Smoothnessof the material, i.e., absence of lumps
Smoothness of pounded yam
Pounded yam
smthpdym
Compute the number of days required from fruit set to fruit phyisological maturity
Fruit maturity time - Computation
Percentage
Property of the product to crumble or break between the fingers
Crumbness in hand
Boiled root
Boiled yam crumbness
BoilYamHdCrum
Record the intensity of tuber hairs or secondary roots on the surface of harvested tubers
Hairiness of tuber bark - Estimation
Big size tubers yield adjusted tons per hectare
BTYA
Big tuber
Big size tuber yield adjusted
yield
Polltyp
pollination type
Mode of plant to plant pollen transfer
Pollination type
Flower
yam flour
content
Tuber flour sugar content
Tuber flour sugar content
Weight of small size yam per plant
Small tuber
Small size tuber weight per plant
WSTPL
Weight
end of flowering time
End of flowering time or when a plant does not produce new flower in a plot
Time to end of flowering
Plant
TIMEF
BTYld
Big size tubers yield nonadjusted tons per hectare
Big tuber
yield
Big size yam yield
Fruit per cross
FrtHvstN
Fruits harvested number
Number of harvested fruits per cross after physiological maturity
Number
colpoundedyam
Optical color or pigmentation of pounded yam
Pounded yam color
Pounded yam
color
Observe relative or absolute area of plant tissue affected by virus disease and record the severity as a proportion or percentage of plant surface affected using visual five ordinal scale . Predominant severity per plot must be registered at least thrice : 8 to 10 weeks after planting, 4 to 6 weeks after first scoring and the last scoring at 4 to 6 weeks after the second scoring
Viruses infection severity - Estimation
Measure the width of at most five big size tubers (?1kg) from net plot at wider portion of the tuber using vernier calliper or measuring tape and record the average
Width of big size tubers-Computation
Stmcol
color
The surface color of stem
Stem
Stem color
Number of nodes carrying cataphylles
Number
Plant
Mean number of nodes carrying cataphylles on main stem of 5 plants choosen randomly
tons/ha
Observe the surface of product and evaluate the frequency/number of the black points
Appearance method
Number of plant
Maturity class
Plant
Senescence
Foliage senescence or maturity class
SE
Tsdh
True seeds harvested
Number of true seed harvested or obained per cross or family
Number
True seed
Ability to set or form fruts-Estimation
Observe fruit setting or formation of female flowers of monoeciouse and dieciouse plants and rate the ability set for form fruits
Incidence of mealybug tuber infestation.
Mealybug tuber infestation incidence
Tuber
MbugInc
Mealybug tuber infestation incidence
Dry rot tuber number-counting
Take count of dry rot tubers per plot at harvest
Bitterness 0-100
Crumbness scale 0-100
number of florets
Fruit index
Compute the ratio of pollinated florets developing mature fruits
Total tuber yield adjusted
TTYA
Tuber
yield
Total tuber yield adjusted tons per hectare
Mealybug tuber infestation severity
Tuber
MbugSev
Severity of mealybug tuber infestation.
Mealybug tuber infestation severity
Secondary sprouting - estimation
Record emergence of new secondary sprouts from the planted seed tuber/sett in a plot at three months after planting
Sweetness 0-100
0-2 scale
Seed index is an estimation of pollinated flowers producing seeds
seed set ratio
Seed index
Seed
Date crossing-Estimation
Record the date crossing made in particular flower of a plant.
yam flour
Tuber flour protein content
Tuber flour protein content
content
Fruits harvested number - Counting
Record the number of harvested fruits per cross
Time to 50% foliage senescence
Time when 50% of the plants in a plot are showing signs of foliage senescence
50% Senescence time
TIMsen
Plant
Prtbs
Place of roots on tubers
Roots position
Tuber
Position of appearance of roots at surface of tubers
Record time (date) of first flower initiation in a plot or the date any of the plants in a plot shows the first flower
Flower initaition time - Estimation
1-7 general scale
Boiled yam
The optical appearance of boiled yam related with surface glossy or dullness and light scattering power of boiled yam structure
Boiled yam appearance
appboiledyam
appearance
petlngth
Petiole length
Length of petiole
Petiole
Lengh
Oxidation ratio of flesh
Tuber flesh
Tuber flesh oxidation
Texture in the hand stickness method
Sample is touched with fingers or moulded in the hands
Flesh oxidation
Presence of cataphylles during early stage
Plant
Heterophylly presence
Presence
Flower initaition time - Computation
Computing the number of days required from first sprout emergence to first flower initiation
Stickiness
StickPndedYam
The degree to which the pounded yam is adhesive or stick to the fingure, mouth surface and teeth
Pounded yam
Stickiness of pounded yam
Score the length oxidation (from head) and the length tuber and record the oxidation length / length tuber ratio
Stretchability scale 0-10
Flesh oxidation - computation
Stem internode
Internode length
length
Internode length
Intndlngth
Floret pollinated number - Counting
Count the number of pollinated florets per female parent per cross
shape
Leaf apex shape
Lfapx
Leaf apex
Leaf apex shape
Observe the appearance (structure and pigmentation) of pouned yam and make visual score using scale how attractive or appealing on table or plate to eat
Appearance of pounded yam-Estimation
PPE
Proportion of emerged plants
Proportion
Proportion of plants /sprouts emerged in a plot
Plant or sprout
Period duration from first to last sprouts emergence
Elapsed time between time of 5th and 95th percentiles emergence sprouts in a plot
Emergence vigor
Sprout
0-7 scale
Assess the leaf beetle infestation at two and five months after planting and record its severity
Leaf beetle severity - Estimation
Bulbsp
Aerial tuber
Shape
Predominant shape of the bulbils
Bulbil shape
Color of pounded yam-Estimation
Observe the optical color or pigementation of pounded yam and make visual score using scale how acceptable or appealing on table or plate to eat
Compute the proportion of seedlings per family (cross) establish well and ready for transplanting, usually recorded at five weeks after sowing.
Seedling establishment rate-computation
Compute the ratio of pollinated florets developing seeds
Seed index
Oxidation intensity
Intoxd
Tuber flesh oxidation intensity
Intensity of tuber flesh enzymatic oxidation (degree of flesh color change or browning of cut yam tuber)
Tuber
Assess the small or odour the boiled yam that sensed at the nose before the yam reaches mouth and make sensory score using scale how appetizing or appealing the boiled yam to eat
Aroma of boiled yam-Estimation
Tuber shape - Estimation
Determination of the predominant shape in the entire family/plot as a unit
Proportion of dry matter in the tuber.
Tuber
Tuber dry matter content
Dry matter content
TubDMC
Compute the average of the period from emergence to first true leaf appearance on the main stem of 5 plants choosen randomly
Duration of heterophylly period - Computing
1-2 scale
The vigour of the vine and leaves of the new plant.
PVigor
Plant Vigor
vigor
Plant
number of leaf
Yam starch breakdown
starch
Tuber
starchbrk
The breakdown of yam starch extracted from fresh tubers were determined using a Rapid Visco-Analyser (RVA-TecMaster, Perten Instruments, Australia)
Distance to which the deformed material can be sretchable
Pounded yam
sprgpdym
Springiness
Springiness of pounded yam
Petiole length - Computation
Measure the length of petiole using measuring tape on sampled 20 adult leaves ( four leaves per plant on at leat five plants in a plot), and record the average length
Observe the presence or absence of hairs on stem surface
Hair on stem - Estimation
Corm type-Estimation
Record the corm type as regular, transversally elongated or brached using scale
NIRS model prediction - computation
Prediction of sugar content using NIRS spectra (FOSS 6500) of tuber flour sample
number of tubers
SPBCOL
Presence of spot on spine base
colored spot
Spine
Presence of colored spots at the spine base of sprouted shoots (vine) with spines
Number
Number of bulbils or aerial tubers produced
Aerial tuber
Number of bulbil
Bulbpl
Measure the length of at most five big size tubers (?1kg) from base to tip in a net plot at harvest and record the average
Length of big size tubers-Computation
Averaged crop vigor expressed in days from median emergence to 80% of maximum ground cover in subplots.
Ground cover computed from weekly images analysis.
Time at 80% of maximum growth computed via inverse regression of time to event Beta ground cover dynamic model.
Duration from median emergence to 80% of maximum ground cover of subplot - Computation
Cracks on tuber surface
Tuber
Tuber cracks
Cracks
CTBRS
Dry rot presence on harvested tubers-Estimation
Observe the occurance or presence of dry rot caused by nematods (Scutellonema bradys and Practylenchus spp.) on harvested tubers and record the presence and absence
Branch number
Number
Branch
Number of branches above ground
branch
Average width of small size tubers harvested in a net plot or unit area
Stbrwd
Small size tuber width
Small tuber
Length
Record date when 50% of plants in a plot begin producing bulbils or aerial tubers
Bulbil initiaition time - Estimation
rvt
Leaf color
Leaf
color
mlfcol
The leaf surface color or pigmentation
Tuber flesh
color
The surface browness of the yam tuber flesh
Browness of the Tuber flesh colour
Tuber surface smoothness
Tbrtxtur
texture
Tuber surface texture
Tuber
Hairiness of sprout - Estimation
Record existance of hairs on a sprout (vine)
Calculated as big size yam tuber weight per plot divided by size of effective harvest plot mutiplied by 10
Big size yam yield no adjusted- Computation
yam flour
Tuber flour starch content
content
Tuber flour starch content
Averaged maximum ground cover over two subplots.
Ground cover computed from weekly images analysis.
Maximum ground cover computed from ground cover dynamic modeled using time to event Beta Growth model.
Subplot maximum ground cover from weekly image analysis - Computation
Compute average tuber length of all size tubers measurement taken in a net plot
Tuber length-Computation
Score taste of pounded yam using sensory test panalist
Taste of pounded yam - Estimation
Average weigth of big size tuber
Big tuber
Weight
Average weight of big size tubers in kg
AWBT
Compute the ∆E2000 bewteen mean tuber head and tail flesh color computed from standardized image L*a*b* values
Color difference bewteen mean tuber head and tail flesh color computed from standardized image L*a*b* values
1-5 scale
GDD°C
Record the date fruit set in 50% of plants in a plot
50% fruit set time-Estimation
Determination of predominant size of the tuber in the entire family
Tuber size - Estimation
Record position of appearance of roots at surface to tubers
Position of root appearance on tubers-Estimation
Compute the number of days required from 50% of sprouts in plot emerged to 50% of plants in a plot are having at least one flower/inflorescence
50% flowering time - Computation
The surface color of the yam tuber flesh
color
Tuber flesh
Tuber flesh color
0-4 general scale
1-5 scale
Seedling tranplant survival rate-computation
Compute the proportion of seedlings survived or established well after transplant operation
Microscopy image analysis
Microscopy (10x) image analysis of iodin colored yam tuber flour (0.5mm)
Number
Medium tuber
Medium size tubers per plot
Number of medium size tubers that weighing ? 0.5kg and <1 kg in a net plot or unit area
NMTP
tuber number/plant
Smoothness
Pounded yam smoothness
Absence of lumps
Pounded yam
YamHdSmot
Flower
Intensity or abudance of female flowers on spikes/infloresences
Female flowering intensity
abondance
fflrint
Brownness scale 0-100
Stickness in hand
Boiled yam stickness
Property related to the adhesion of the product between the fingers
Boiled root
BoilYamHdStick
number
Number of big size tubers ( ?1 kg) per plant
NBTPL
Big size tubers per plant
Big tuber
Take count of well established plants in a plot usually at two months after planting
Number of well established plants -Counting
Observe the presence or absence of cataphylle
Presence of cataphylle
Tuber flesh oxidation color-Estimation
Record the flesh enzymatic oxidation color using color scale
Record the tendency of vine to twine or climb
Twining habit-Estimation
color
Boiled yam
colbldyam
Boiled yam color
Optical color or pigmentation of boiled yam
Record the number of germinated seedlings per cross or family
Number of germinated seedling-Counting
Boiled yam Yam flavor
Yam odour
Odour of boiled yam
Boiled root
BoilYamOdor
Hardness of cutting or breaking
Boiled root
Force required to cut/break with fork
BoilYamHdHard
Boiled yam hardness
Total fresh weight of all category or size tubers harvested in a net plot
TTWP
Tuber
weight
Total fresh tuber weight per plot
Pollinated spike number - Estimation
Count the number of pollinated spikes per female parent per cross
emergence time
Leaf
TIMLE
Time to first leaf emergence
Time to the first leaf emergence on a plant or sprouted shoot (vine) in a plot
First inflorescence time - Compuation
Compute the number of days required to first inflorescence emergence in a plot
Weight
Medium tuber
Medium size tubers weight per plot
Weight of medium size tubers (? 0.5kg and <1 kg) in a net plot or unit area
MTW
Quantity of Female Flowers which has been pollinated using male flower from a monoecious or dioecious parent
number
NpollF
Inflorescence
Pollinated florets number
Bulbil weight
Bulbwtp
Aerial tuber
Weight
Weight of vine bulbils or aerial tubers harvest
Size
Corm size
Size of corm in relation to tuber
corsz
Corm
Bitterness after taste 0-100
Stickness scale 0-100
WTP
Weight of seed tubers (whole seed yams or setts ) planted in a plot or per unit area. Planting material from a tuber is called sett. Seed tuber could be either small, healthy whole tuber or large tubers cut into pieces (sett)
Weight
Weight of planted tubers
Seed tuber
Twining direction-Estimation
Record the twining or climbing direction of the vine
Stem
Stem height
Height or the length of stem
height
Stmht
50% flowering time
TIMFL
Time when 50% of the plants flower in a plot
Plant
Time to 50% flowering
Plant type-Estimation
Visual assessment of the tendency of a plant to grow in a certain shape and to attain mature height and spread
Compute number of days required from sprout emergence to 50% of plants in a plot start forming bulbils or aerial tubers
Bulbil initiation time - Computation
Compute by dividing fresh weight measurement of big size tubers taken to the number of harvested plants in a net plot
Big size yam fresh weight per plant- computation
Compute by dividing fresh weight measurement of small size tubers taken to the number of harvested plants in a net plot
Small size yam fresh weight per plant-computation
Compute the number of days required for 50% of the plants in a plot showing foliage senescence
Time to 50% foliage senescence time - Computation
Foliage senescence time - Estimation
Record the date when all plants in a plot shows a sign of 100% foliage senescence
Record leaf apex shape of mature plants in a plot
Leaf apex shape-Estimation
Record absence or presence of spines on a sprout (vine)
Spines on sprout base-estimation
TIMfsen
Time to all plants in a plot or unit area show full or complete foliage senescence
Senescence time
Plant
Foliage senescence time
1-4 score
aroma
Boiled yam aroma
Boiled yam
arombldyam
The sense of smell or odor of boiled yam that reaches the nose before eating or the boiled yam reaches the mouth
scale_of
Yam odour scale 0-100
Pounded yam
Pounded yam appearance
apppoundedyam
appearance
The optical appearance of pouned yam related with surface glossy or dullness and light scattering power of pounded yam structure
Record date of first spout emergence in a plot
Time first sprout emergence-Estimation
Hardness scale 0-100
Observe the leaf abundance or mass on a mature plant and rate the density
Leaf density - Estimation
Record the predominant color of the sprouts (plant) per plot at 20 days after emergence
Sprout color - estimation
Times to the first leaf emergence on sprouted shoot (vines)-Computation
Compute the number of days required from first sprout emergence to the first leaf to emerge on a sprouted shoot (vine) in a plot
Tuber
Tuber flesh enzymatic oxidation rate
Tuber flesh oxidation
Tfoxd
Enzymatic oxidation rate
Duration between 5% emergence and 95% senescence of subplot - Computation
Averaged growth cycle duration expressed in days between 5% emergence and 95% senescence (i.e. 5% of maximum ground cover after time to maximum ground cover) in two subplots.
Ground cover computed from weekly images analysis.
Median senescence computed from inflection point value using log-logistic time-to-event modeling of weekly sprout counts expressed in days after planting.
Time at 5% of maximum growth after time at maximum growth computed via inverse regression of time to event Beta ground cover dynamic model.
A 1.7 g portion of starch was mixed with 25 g of distilled water in the RVA sample can, after correction for the original moisture contents of the starches
Starch breakdown-Estimation
1-9 scale
Fruit developed number
Number
Nfrts
Quantity of developed fruits per crosses
Fruit per cross
diameter
Stem
Stem diameter of a mature plant (5 to 6 month old plant)
STMDM
Stem diameter
Tuber shape quantitative computation
Appearance method
Cirad
G.Arnau
Visually inspect sample surface
Internode length -computation
Measure the internode length of five plants before senescence at 1 meter height and record the average
Record the presence or absence of thorns or spines on the tuber skin in visual scale
Tuber thorniness - Estimation
Computation of the substraction between the necessary time before 95% and 5% emergence using after-fitting inverse regression of log-logistic time-to-event modeling of weekly sprout counts expressed in days after planting
Period from 5% to 95% emergence
Small size tubers per plant-Computation
Compute the number of small size tubers produced per plant using the formula number of small size tuber in a plot divided by the total number of harvested plants
Computation of inflection point value using log-logistic time-to-event modeling of weekly sprout counts expressed in days after planting
Period from planting to median emergence
Vein color - Estimation
Assess the color of leaf vein on the upper surface
Pollination type-Estimation
Record the method used to transfer the pollen grains from the anther of a flower to the stigma of a flower of the same or different plant of the same species
Number
fbrpdym
Fibrousness of pounded yam
Pounded yam
Presence of fiber strands
Presenceof ?ber strands
DateFH
Time of fruit harvesting
Time to fruit harvesting
Harvesting ime
Fruit
Compute the average of the number of nodes carrying cataphylles on the main stem of 5 plants choosen randomly
Nodes carrying cataphylles - Counting
Stem diameter-computation
Measure the stem diameter at 15 cm above the base of five plants before senescence in a plot and record the average
Record the total number of true seed or botanical seed harvested or obtained per cross or family
Quantity of true seed harvested -Counting
Compute the proportion of sown true or botanical seed which germinate and produce seedling ready for transplant , usually observed at three weeks after sowing.
Germination rate - Computation
Corm separation from tuber-Estimation
Record the corm ability to be separated from tuber in a binary scale
number of bulbils
Plant or flower sex-Estimation
Scoring the most frequent flower sex type when more than 50% of the plants are flowered
Count the number of tubers in a plot weighing less than 500 gm harvested per effective plot
Small size tubers harvested per plot number - counting
plants per plot
Score the severity of dry rot in harvested tubers
Tuber dry rot severity - Estimation
Compute the proportion tubers with tubers beetle damage from the total number of harvested tubers in the effective plot at harvesting time.
Tuber beetle incidence - Computation
Black spots presence scale 0-100
Record weight of rotten and/or diseased tubers harvested in a net plot
Rotten tuber fresh weight per plot - Measurement