Descriptor list details

Descriptors for Lathyrus spp

2000

Descriptors for Lathyrus spp. was developed by Dr R.L. Pandey, Dr P.N. Mathur, Dr Stefano Padulosi and Dr R.N. Sharma with inputs from Dr K.W. Riley, Dr V. Ramanatha Rao, Dr Larry Robertson and Dr Bhag Mal. The development of this descriptor list has been coordinated by Dr P.N. Mathur. A draft version prepared in the internationally accepted IPGRI format for descriptor lists was subsequently sent to a number of international experts for their comments and amendments.

Crop
Grasspea
Publisher
IPGRI
Bibliographic citation

International Plant Genetic Resources Instit., (IPGRI). (2000). Descriptors for Lathyrus spp. Rome: Bioversity.

Version
2000

Recorded 10 days after emergence

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Light green
2Green
3Green-purple
4Purple
99OtherSpecify in descriptor 7.10 Notes

Recorded 10 days after emergence

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Light green
2Green
3Green-purple
4Purple
99OtherSpecify in descriptor 7.10 Notes

Recorded 20 days after emergence

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor
5
Intermediate
7
Vigorous

Recorded during emergence to flowering initiation

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Low
5
Medium
7
High

Recorded after flowering initiation

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Low
5
Medium
7
High

Recorded at the beginning of flowering period. (See Fig. 3)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Prostorate
2Spreading
3Semi-erect
4Erect
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Indeterminate
2Determinate

Height of plant at physiological maturity measured from ground to the tip of the longest branch

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Recorded on the main branch

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Few
5
Medium
7
Many

Recorded on the main branch

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large

Count the total number of nodes to the first pod-bearing position on the main branch

Classification
Characterization descriptor
Data type
Numeric

Recorded at 50% flowering

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Light green
2Green
3Green-purple
4Purple
99OtherSpecify in descriptor 7.10 Notes

Measured at the middle of the main branch at 50% flowering

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Assessed at the middle of the main branch at 50% flowering

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
Wingless
3
Narrow
5
Medium
7
Wide
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
No coating
3
Small
5
Medium
7
Large
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Round
2Square
3Deeply fasciated
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Evenly distributed throughout the whole plant
2Mainly on lower part of the plant
3Mainly in middle part of the plant

Counted at first pod maturity (only pod-bearing branches)

Classification
Characterization descriptor
Data type
Numeric

Measure the longest branch

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Counted at first pod maturity (only pod-bearing branches)

Classification
Characterization descriptor
Data type
Numeric
Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
No nodules
3
Low
5
Intermediate
7
High
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0AbsentNon-active
1PresentActive nodules

Recorded at 50% flowering

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Present
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Tendril
2Phyllody
3SimpleLamina not bifurcated into leaflets
4Bipinnate
5Multipinnate
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1One pair
2Two pairs
3More than two pairs
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Light green
2Green
3Dark green
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0No
1Yes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0No
1Yes

Recorded at 50% flowering from the middle area of the main branch

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large

Maximum length of leaf lamina recorded from the middle area of the main branch

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Maximum width of leaf lamina recorded from the middle area of the main branch

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

(See Fig. 4)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Linear
2Lanceolate
3Ovate-lanceolate
4Ovate
99OtherSpecify in descriptor 7.10 Notes

Measured from the base to the point where leaf intersects petiole

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Green
2Purple-green
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Short
2Medium
3Long
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Tendril subulate
2Tendril simple
3Tendril compound
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Tendril subulate
2Tendril simple
3Tendril compound
99OtherSpecify in descriptor 7.10 Notes

Recorded when 80% of pods have reached maturity

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Low
5
Medium
7
Moderate

Recorded when 80% of pods have reached maturity

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
No visual senescence
3
Slight visual senescence
5
Moderate senescence
7
Conspicuous concurrent senescence
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Present
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Upper surface of leaf
2Lower surface of leaf
3Both upper and lower surfaces of leaf
4Only on leaf margin
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Subulate
2Linear
3Half shaft-shaped
4Shaft-shaped
5Heart-shaped
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large

Number of days from sowing to when the first flower opens

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
d

Number of days from sowing to stage when 50% of plants have begun to flower in a row

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
d

Number of days from sowing to first mature pod separating from plant

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
d

From sowing to when 80% of plants have mature pods

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
d

Number of days from first flowering to first mature pod

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
d

Measured as the mean length of randomly chosen peduncles at maturity

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

(Just before opening)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Globular
2Intermediate
3Long
99OtherSpecify in descriptor 7.10 Notes

(Just before opening)

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large

Measured on randomly selected, fully expanded flowers

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Measured on randomly selected, fully expanded flowers

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Score on fresh, open flowers for score standard, wing and keel colours separately

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1White
2White blue
3Blue
4Grey
5Light yellow
6Yellow
7Pink
8Orange
9Red
10Violet-blue
11Violet
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Blue
2Grey
3Violet
4Yellow
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Light green
2Green
3Green-purple
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Shorter than tube
2Equal to tube
3Longer than tube
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Narrow
5
Medium
7
Broad
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Sharp
2Blunt
99OtherSpecify in descriptor 7.10 Notes

Recorded up to 50% pod maturity

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
%

Recorded as height to the lowest pod (see descriptor 7.2.4)

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Recorded as length of stem between the lowest pod-bearing position to the topmost pod-bearing position

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1One
2Two
3Three
99OtherSpecify in descriptor 7.10 Notes

Mean number of pods. Recorded from randomly selected plants at physiological maturity

Classification
Characterization descriptor
Data type
Numeric

Mean number of pods having seed(s). Recorded from randomly selected plants at physiological maturity

Classification
Characterization descriptor
Data type
Numeric

(See Fig. 5)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Oblong-elliptical
2Medium oblong-elliptical
3Curved
4Beaded
5Broad-linear
6Broad-elliptical
99OtherSpecify in descriptor 7.10 Notes

Recorded on mature pods. (See Fig. 6)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Straight
2Slightly curved
3Curved

(See Fig. 7)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Pointed
2Blunt
99OtherSpecify in descriptor 7.10 Notes

Recorded on a fully expanded immature pod from end of last loculus up to the pod tip

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
Absent
3
Short
5
Medium
7
Long
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Yellow-cream
2Light green
3Green
4Dark green
5Green-purple
6Light purple
7Purple
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Yellow-green
2Violet mottled
3Grey
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Longitudinal
2Netted
99OtherSpecify in descriptor 7.10 Notes

Maximum mean length of randomly selected mature pods. Recorded at physiological maturity

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Maximum mean width of randomly selected mature pods. Recorded at physiological maturity

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
Absent
3
Narrow
5
Medium
7
Wide
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
Absent
3
Low
5
Medium
7
Large

(See Fig. 8)

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
Absent
3
Slight
5
Medium
7
Pronouncred

Mean number of seeds counted on randomly selected pods. Recorded at physiological maturity

Classification
Characterization descriptor
Data type
Numeric

Scored one week after maturity

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

0
No shattering
3
Low shattering
5
Medium shattering
7
High shattering

(See Fig. 9)

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Oblate or flattened
2Triangular
3Rhomboid
4Square
5Obtriangular
6Spherical
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Small
5
Medium
7
Large
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Greyed-white
2Yellow-white
3Grey
4Brown
5Yellow-green
6Pink
7Red-purple
8Black
9Grey mottled
10Green mottled
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Smooth
2Tubercular
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Marbled
2Dotted
3Streaked
4MixtureAny combination of 1, 2 and 3
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cream
2Green
3Brown
4Red-purple
5Black
99OtherSpecify in descriptor 7.10 Notes

Recorded after removing the seed coat

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Yellow
2Orange
99OtherSpecify in descriptor 7.10 Notes
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Narrow
5
Medium
7
Wide
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Present

Weight of 100 randomly selected mature seeds at 8-10% (air-dry) seed moisture content

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
g

Recorded on the basis of 94% ethanol displaced by 100 seeds

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm3

Recorded as mean weight of seeds on five randomly selected plants

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
g

Recorded at 8-10 leaf stage

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor
5
Medium
7
Good
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor
5
Medium
7
Good
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor
5
Medium
7
Good
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
1Present
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor
5
Medium
7
Good

Recorded at 50% flowering

Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Poor Main stem easily visible
5
Medium
7
Good Very leafy

Recorded in comparison with other forage legumes (specify the name of crop used for comparison)

Classification
Characterization descriptor
Data type
Free text

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