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