Table 2.
Mean response, variance component estimates and heritability for IR, DS, and CI variables
| DS (%) | IR(0–1) | CI | |
|---|---|---|---|
| Range | 10–80 | 0.3–1 | 3–80 |
| Grand mean | 33.90 | 0.8 | 28.27 |
| BLUEs | 32.60 | 0.8 | 26.902 |
| σ2G | 385.3*** | 0.013*** | 374.5*** |
| σ2E | 21.05* | 0.000ns | 15.7 ns |
| σ2GxE | 20.70** | 0.005ns | 24.1** |
| σ2 error | 166.10 | 0.004 | 200.3 |
| H | 78.95 | 72.2 | 75.7 |
|
CV r |
37.93 0.76 | 8.52 0.85 | 50.06 0.78 |
Disease severity (DS); infection response (IR); coefficient of infection (CI); BLUEs, best linear unbiased estimate; σ2G estimate of genotypic variance; σ2E estimate of environmental variance; σ2GxE is the genotype by environment interaction variance, σ2 error is the residual error variance; heritability (H); r Pearson’s correlation coefficients among stem rust DS, IT, and CI between two seasons. *, **, *** and ns represents significance at P < 0.05, P < 0.01, P < 0.001, and not significant, respectively