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