Descriptor list details

Descriptors for sorghum (Sorghum bicolor (L.) Moench)

1993

Descriptors for sorghum Sorghum bicolor (L.) Moench OCR

Crop
Sorghum
Publisher
IBPGR
Bibliographic citation

IBPGR and ICRISAT. (1993). Descriptors for sorghum Sorghum bicolor (L.) Moench. International Board for Plant Genetic Resources, Rome, Italy; International Crops Research Institute for the Semi-Arid Tropics, Pantacheru, India.

Version
1993

of main stalk at 50% flowering. Mean of 10 randomly selected plants. See figure 1

Classification
Characterization descriptor
Data type
Free text

At harvest. The royal horiculture society (RHS) colour codes are given in parentheses beside the descriptor states

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1PigmentedGrey-brown group colour: 199A: brown group 200D: 200C: 200B: 200A
2TanGreyed-yellow group 161B
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Not juicyDry
+Juicy
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Sweet
2Insipid

RHS colour codes are given in parentheses beside the descriptor states

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1WhiteColourless) (white group 155B
2Dull greenGreyed-green group 191C
3YellowYellow group 7A, 7B
4BrownGreyed-orange group 165C
5PurpleGreyed-purple group 183D, 183B, 183A
6OtherIn the descriptor notes 4.4
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Slightly present
5
Medium
7
Mostly bloomy
9
Completely bloomy

From emergence till when 50% of the plants have started flowering

Classification
Characterization descriptor
Data type
Free text

See figure 2

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Very lax panicleTypical of wild sorghum
2Very loose erect primary branches
3Very loose drooping primary branches
4Loose erect primary branches
5Loose drooping primary branches
6Semi-loose erect primary branches
7Semi-loose drooping primary branches
8Semi-compact elliptic
9Compact elliptic
10Compact Oval
11Half broom corn
12Broom Corn
13OtherSpecified in the descriptor notes 4.4

At maturity, RHS colour codes are given in parentheses beside the descriptor states

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1WhiteWhite group 155D,155C,155B,155A
2SiennaYellow group, 6D,6C,6B,6A
3MahoganyGreyed-orange group 164A,164B, 165A, 164B
4RedOrange-red group 33C,33B,33A,34A
5PurpleGreyed-purple, 183D, 183C,183B,183A
6BlackBlack group 202A: rown group 200A
7GreyGreyed-green group 197D, 197C
8OtherSpecified in the descriptor notes 4.4

Amount of grain covered by glumes. At maturity see figure 3

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

Legend:

1
25% grain covered
3
50% grain covered
5
75% grain covered
7
Grain fully covered
9
Glumes longer than grains

At maturity

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Awnless
+Awned
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

1
Very low
3
Low
5
Intermediate
7
High
9
Very high

RHS colour codes are given in parentheses beside the descriptor states

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1WhiteWhite group 155D, 155C, 155B, 155A
2YellowYellow group 6D,6C,6B,6A
3RedOrange-red group 33C,33B,33A,165B,165A
4BrownGreyed-orange group 164B,164A,165B,165A
5BuffGreyed-orange group 166B
6OtherIn the descriptor notes 4.4
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0AbsentNo lustrous
+PresentLustrous

at 12% moisture content

Classification
Characterization descriptor
Data type
Free text

Average of 5 panicles in the plot

Classification
Characterization descriptor
Data type
Numeric
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0Absent
+Present

See Figure 4

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

Legend:

3
Dimple
7
Plump

See Figure 5

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Single
2Twin

See Figure 6

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

Legend:

1
Completely Corneous
3
Mostly corneous
5
Intermediate
7
Mostly starchy
9
Completely starchy

RHS colour codes are given in the parenthese beside the descriptor states

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1WhiteWhite group 155B
2YellowGreyed-yellow group 162A
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Normal
2Waxy
3Sugary

Observed 15 days after emergence

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

Legend:

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

Legend:

3
Low
5
Intermediate
7
High

Death of leaves and stalk at grain maturity

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

Legend:

1
Very slightly senescent
3
Slightly senescent
5
Intermediate About half of leaves dead
7
Mostly senescent
9
Completely senescent Leaves and stalk dead

Overall agronomic desirability of the accession as observed visually

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

Legend:

3
Poor
5
Medium
7
Good

Recorded on the basis of the rainy seasons (long-days): post rainy season (short days): ratios of plant height (4.1.1) and days to flowering (4.2.1)

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

Legend:

3
Low
5
Intermediate
7
High

From 10 randomly selected plants. Mian stem is considered as one

Classification
Characterization descriptor
Data type
Numeric
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0NoNo synchrony
+YesMain stem and tillers at the same time

See Fig.7

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Slightly exserted<2 cm but ligule of flag leaf definitively below inflorescence base
2Exserted2-10 cm between the ligule and inflorescence base
3Well-exserted>10 cm beyween ligule and the inflorescence base
4Peduncle recurvedInflorescence below ligule and clearly exposed splitting the leaf sheath

From base of inflorescence (head) to tip. Mean of five randomly chosen plants

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

In natural position at the widest part. mean of five randomly selected plants

Classification
Characterization descriptor
Data type
Free text

The reaction of F1 plant when dusted with the pollen of the accession

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Non-restorer
2Partial restorer
3Restorer
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Milo
2Texas
3Maldandi

Weight required to crack the grain

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

Legend:

1
Very difficult <50%
3
Difficult 60-69%
5
Intermediate 80-84%
7
Good 90-94%
9
Excellent 99-100%
Classification
Characterization descriptor
Data type
Scale
0
1
2
3
4
5
6
7
8
9

Legend:

3
Low Good resistance
5
Medium
7
High Poor resistance

Absolute amount

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

Legend:

3
Low <7.0-10.0
7
High >15.0-21.7

Absolute amount

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

Legend:

3
Low 1.5-1.57
7
High 3.0-3.65
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Testa brownGreyed-orange group 165B, 165A
2Testa and pericarp brownGreyed-orange group 165B,165A