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