Table 3.
Shannon diversity indices, corresponding proportion (%), and significance tests for qualitative traits among 345 sorghum genotypes evaluated in two locations in Uganda.
| Traits | Category | Proportion (%) | Diversity index (H′) | Shannon's equitability (EH) | df | Chi-square |
|---|---|---|---|---|---|---|
| Glume color | 1 | 18.2 | 0.72 | 0.12 | 1032 | 2574.0∗∗∗ |
| 2 | 1.2 | |||||
| 3 | 75.7 | |||||
| 4 | 5.0 | |||||
| Leaf midrib color | 1 | 29.6 | 0.61 | 0.1 | 344 | 858.0∗∗∗ |
| 2 | 70.4 | |||||
| Grain color | 1 | 16.5 | 1.41 | 0.24 | 1376 | 3432.0∗∗∗ |
| 2 | 18.8 | |||||
| 3 | 27.3 | |||||
| 4 | 35.4 | |||||
| 5 | 2.0 | |||||
| Inflorescence compactness | 1 | 20.6 | 1.06 | 0.18 | 1032 | 2574.0∗∗∗ |
| 2 | 30.7 | |||||
| 3 | 48.4 | |||||
| 4 | 0.3 | |||||
| Inflorescence shape | 1 | 1.7 | 1.04 | 0.18 | 1032 | 2574.0∗∗∗ |
| 2 | 44.9 | |||||
| 3 | 42.0 | |||||
| 4 | 11.3 | |||||
| Glume covering | 1 | 60 | 0.93 | 0.16 | 1376 | 3432.0∗∗∗ |
| 2 | 32.2 | |||||
| 3 | 5.5 | |||||
| 4 | 1.4 | |||||
| 5 | 0.9 | |||||
| Awn | 1 | 7.5 | 0.27 | 0.05 | 344 | 858.0∗∗∗ |
| 2 | 92.5 | |||||
| Agronomic score | 1 | 6.3 | 0.83 | 0.14 | 688 | 758.8∗ |
| 2 | 31.4 | |||||
| 3 | 62.4 | |||||
| Panicle exsertion | 1 | 5.5 | 1.08 | 0.18 | 1032 | 2203.4∗∗∗ |
| 2 | 50.5 | |||||
| 3 | 35.9 | |||||
| 4 | 8.2 | |||||
| Stay green | 1 | 0.5 | 1.3 | 0.22 | 1376 | 3421.4∗∗∗ |
| 2 | 19.7 | |||||
| 3 | 38.8 | |||||
| 4 | 31.4 | |||||
| 5 | 9.7 |
aGrain color [1 = White, 2 = Yellow 3 = Red, 4 = Brown, 5 = Buff (a light brown to yellow group), 6 = Others]; Glume color (1 = Sienna [yellow group], 2 = Mahogany (grey to orange group), 3 = Red, 4 = Black, 5 = Purple, 6 = White, 7 = Grey, 8 = Other); Leaf midrib color (1 = Pale green, 2 = White, 3 = Green, 4 = Purple, and 5 = Colorless); Inflorescence compactness (1 = Compact, 2 = Semi-compact, 3 = Loose, and 4 = Semi-loose); Inflorescence shape (1 = Erect, 2 = Drooping, 3 = Elliptic, and 4 = Oval); Glum covering (Amount of grain covered by glum; 1 = 25%, 2 = 50%, 3 = 75%, 4 = 100% or grain fully covered, and 5 = Glumes longer than grain); Awn (1 = present or 2 = absent at maturity); Agronomic score (1 = Poor, 2 = Average, and 3 = Good); Panicle exsertion (1=<2 cm, slightly exserted; 2 = 2–10 cm, exserted; 3=>10 cm, well exserted; 4 = Peduncle recurved); Stay green (Visual rating at physiological maturity; 1 to 5 scales, where 1 = Very slightly senescent; 2 = Slightly senescent; 3 = Intermediate (about half of leaves dead); 4 = Mostly senescent; and 5 = completely senescent (plant leaves and stalk dead); ∗ = P ≤ 0.05; ∗∗∗ = P ≤ 0.001; df = Degree of freedom.