Descriptors for sorghum Sorghum bicolor (L.) Moench OCR
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.
of main stalk at 50% flowering. Mean of 10 randomly selected plants. See figure 1
At harvest. The royal horiculture society (RHS) colour codes are given in parentheses beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | Pigmented | Grey-brown group colour: 199A: brown group 200D: 200C: 200B: 200A |
| 2 | Tan | Greyed-yellow group 161B |
| Code | Term | Description |
|---|---|---|
| 0 | Not juicy | Dry |
| + | Juicy |
| Code | Term | Description |
|---|---|---|
| 1 | Sweet | |
| 2 | Insipid |
RHS colour codes are given in parentheses beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | White | Colourless) (white group 155B |
| 2 | Dull green | Greyed-green group 191C |
| 3 | Yellow | Yellow group 7A, 7B |
| 4 | Brown | Greyed-orange group 165C |
| 5 | Purple | Greyed-purple group 183D, 183B, 183A |
| 6 | Other | In the descriptor notes 4.4 |
Legend:
Slightly present
Medium
Mostly bloomy
Completely bloomy
From emergence till when 50% of the plants have started flowering
See figure 2
| Code | Term | Description |
|---|---|---|
| 1 | Very lax panicle | Typical of wild sorghum |
| 2 | Very loose erect primary branches | |
| 3 | Very loose drooping primary branches | |
| 4 | Loose erect primary branches | |
| 5 | Loose drooping primary branches | |
| 6 | Semi-loose erect primary branches | |
| 7 | Semi-loose drooping primary branches | |
| 8 | Semi-compact elliptic | |
| 9 | Compact elliptic | |
| 10 | Compact Oval | |
| 11 | Half broom corn | |
| 12 | Broom Corn | |
| 13 | Other | Specified in the descriptor notes 4.4 |
At maturity, RHS colour codes are given in parentheses beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | White | White group 155D,155C,155B,155A |
| 2 | Sienna | Yellow group, 6D,6C,6B,6A |
| 3 | Mahogany | Greyed-orange group 164A,164B, 165A, 164B |
| 4 | Red | Orange-red group 33C,33B,33A,34A |
| 5 | Purple | Greyed-purple, 183D, 183C,183B,183A |
| 6 | Black | Black group 202A: rown group 200A |
| 7 | Grey | Greyed-green group 197D, 197C |
| 8 | Other | Specified in the descriptor notes 4.4 |
Amount of grain covered by glumes. At maturity see figure 3
Legend:
25% grain covered
50% grain covered
75% grain covered
Grain fully covered
Glumes longer than grains
At maturity
| Code | Term | Description |
|---|---|---|
| 0 | Awnless | |
| + | Awned |
Legend:
Very low
Low
Intermediate
High
Very high
RHS colour codes are given in parentheses beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | White | White group 155D, 155C, 155B, 155A |
| 2 | Yellow | Yellow group 6D,6C,6B,6A |
| 3 | Red | Orange-red group 33C,33B,33A,165B,165A |
| 4 | Brown | Greyed-orange group 164B,164A,165B,165A |
| 5 | Buff | Greyed-orange group 166B |
| 6 | Other | In the descriptor notes 4.4 |
| Code | Term | Description |
|---|---|---|
| 0 | Absent | No lustrous |
| + | Present | Lustrous |
at 12% moisture content
Average of 5 panicles in the plot
| Code | Term | Description |
|---|---|---|
| 0 | Absent | |
| + | Present |
See Figure 4
Legend:
Dimple
Plump
See Figure 5
| Code | Term | Description |
|---|---|---|
| 1 | Single | |
| 2 | Twin |
See Figure 6
Legend:
Completely Corneous
Mostly corneous
Intermediate
Mostly starchy
Completely starchy
RHS colour codes are given in the parenthese beside the descriptor states
| Code | Term | Description |
|---|---|---|
| 1 | White | White group 155B |
| 2 | Yellow | Greyed-yellow group 162A |
| Code | Term | Description |
|---|---|---|
| 1 | Normal | |
| 2 | Waxy | |
| 3 | Sugary |
Observed 15 days after emergence
Legend:
Low
Intermediate
High
Legend:
Low
Intermediate
High
Death of leaves and stalk at grain maturity
Legend:
Very slightly senescent
Slightly senescent
Intermediate About half of leaves dead
Mostly senescent
Completely senescent Leaves and stalk dead
Overall agronomic desirability of the accession as observed visually
Legend:
Poor
Medium
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)
Legend:
Low
Intermediate
High
From 10 randomly selected plants. Mian stem is considered as one
| Code | Term | Description |
|---|---|---|
| 0 | No | No synchrony |
| + | Yes | Main stem and tillers at the same time |
See Fig.7
| Code | Term | Description |
|---|---|---|
| 1 | Slightly exserted | <2 cm but ligule of flag leaf definitively below inflorescence base |
| 2 | Exserted | 2-10 cm between the ligule and inflorescence base |
| 3 | Well-exserted | >10 cm beyween ligule and the inflorescence base |
| 4 | Peduncle recurved | Inflorescence below ligule and clearly exposed splitting the leaf sheath |
From base of inflorescence (head) to tip. Mean of five randomly chosen plants
In natural position at the widest part. mean of five randomly selected plants
The reaction of F1 plant when dusted with the pollen of the accession
| Code | Term | Description |
|---|---|---|
| 1 | Non-restorer | |
| 2 | Partial restorer | |
| 3 | Restorer |
| Code | Term | Description |
|---|---|---|
| 1 | Milo | |
| 2 | Texas | |
| 3 | Maldandi |
Weight required to crack the grain
Legend:
Very difficult <50%
Difficult 60-69%
Intermediate 80-84%
Good 90-94%
Excellent 99-100%
Legend:
Low Good resistance
Medium
High Poor resistance
Absolute amount
Legend:
Low <7.0-10.0
High >15.0-21.7
Absolute amount
Legend:
Low 1.5-1.57
High 3.0-3.65
| Code | Term | Description |
|---|---|---|
| 1 | Testa brown | Greyed-orange group 165B, 165A |
| 2 | Testa and pericarp brown | Greyed-orange group 165B,165A |