Table 8.
The six principal components (PC1 to PC6) and the respective eigenvalues for 13 contributing traits among 334 sorghum genotypes assessed in two locations in Uganda.
| Parameters | PC1 | PC2 | PC3 | PC4 | PC5 | PC6 |
|---|---|---|---|---|---|---|
| Eigenvalues | 1.93 | 1.32 | 1.17 | 1.03 | 0.99 | 0.96 |
| Proportion of variance (%) | 29 | 13 | 11 | 8 | 8 | 7 |
| Cumulative variation (%) | 29 | 42 | 53 | 61 | 68 | 75 |
| Eigenvalues (Loadings) | ||||||
| Grain yield (kg/ha) | -0.32 | 0.29 | 0.26 | -0.16 | 0.33 | -0.09 |
| 100 Seed weight (gm) | -0.30 | -0.04 | 0.27 | 0.13 | 0.50 | 0.08 |
| Plant height (cm) | 0.40 | 0.15 | 0.18 | -0.01 | 0.12 | 0.27 |
| Panicle length (cm) | 0.28 | -0.22 | 0.42 | 0.18 | 0.18 | -0.30 |
| Panicle width (cm) | -0.05 | 0.50 | 0.24 | -0.26 | 0.19 | 0.34 |
| Rachis number | 0.18 | -0.07 | -0.38 | 0.12 | 0.50 | -0.33 |
| Days to 50% flowering (days) | 0.44 | 0.28 | 0.02 | 0.11 | 0.07 | -0.05 |
| Grain filling duration (days) | 0.05 | -0.44 | 0.37 | 0.26 | -0.02 | 0.33 |
| Days to 75% maturity (days) | 0.46 | 0.14 | 0.14 | 0.19 | 0.07 | 0.05 |
| Grain Iron (ppm) | 0.22 | -0.24 | 0.18 | -0.60 | -0.22 | 0.13 |
| Grain Zinc (ppm) | 0.17 | -0.27 | -0.01 | -0.61 | 0.33 | -0.25 |
| Panicle exsertion | 0.10 | -0.19 | -0.48 | -0.02 | 0.34 | 0.63 |
| Stay green | -0.19 | -0.36 | 0.18 | 0.04 | 0.16 | 0.08 |
aBoldfaced values denote important traits that contributed to the largest reliable variation in each principal component.