Table 5.
Estimates† of variance components for grain yield, genotypes, and their interactions with location and years under optimal nutrient management.
| Components of variance | Wheat | Barley | Canola | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Yield (t ha-1) | CV (%) | F- Values | Yield (t ha-1) | CV (%) | F- Values | Yield (t ha-1) | CV (%) | F- Values | |
| Genotype (σ2g) | 4.86 | 10.7 | 3.62∗ | 5.38 | 11.6 | 3.55∗ | 3.42 | 7.5 | 2.82∗ |
| Location (σ2l) | 3.45 | 21.3 | 3.12∗ | 3.98 | 20.7 | 3.34∗ | 1.92 | 17.4 | 1.58∗ |
| Year (σ2y) | 3.65 | 16.4 | ns | 4.10 | 18.5 | ns | 2.05 | 9.5 | ns |
| Genotype × Year (σ2gy) | 3.94 | 14.7 | 3.45∗ | 3.89 | 15.8 | 3.18∗ | 2.38 | 12.6 | 1.62 |
| Genotype × Location (σ2gl) | 3.51 | 19.4 | 3.62∗ | 4.05 | 20.6 | 3.22∗ | 2.69 | 14.2 | 1.88∗ |
| Location × Year (σ2ly) | 3.59 | 18.4 | 3.18∗ | 4.00 | 19.6 | 3.82∗ | 2.06 | 15.7 | 2.12∗ |
| G x Y × L (σ2gly) | 3.96 | 13.1 | 3.79∗ | 4.32 | 14.3 | 3.47∗ | 2.68 | 8.8 | 2.82∗ |
| Error | 24.7 | 27.3 | 23.4 | ||||||
†calculated using data from Alberta Agriculture and Rural Development [AARD], 2014; ∗p < 0.05; n.s., not significant.