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