Table 5.
Estimates of genetic effects and standard errors of best fitted models under contrasting conditions for various traits in a cross of Zea mays L.
| Traits | m ± SE | [d] ± SE | [h] ± SE | [i] ± SE | [j] ± SE | [l] ± SE | χ2 (DF) | |
|---|---|---|---|---|---|---|---|---|
| LT (°C) | NS | 36.4 ± 0.16** | −4.6 ± 0.16** | −7.3 ± 0.97** | 3.1 ± 0.53** | 5.7 ± 1.09** | 0.55 (1) | |
| HS | 33.0 ± 0.15** | −2.9 ± 0.14** | 2.8 ± 0.98** | −3.0 ± 1.09** | 2.62 (2) | |||
| CMT (%) | NS | 87.7 ± 1.50** | −30.8 ± 0.22** | −49.6 ± 1.68** | −27.5 ± 1.53** | 5.0 ± 1.41** | 6.04 (1) | |
| HS | 52.2 ± 0.32** | −25.5 ± 0.33** | −17.5 ± 0.60** | 15.2 ± 1.53** | 5.69 (2) | |||
| TR (μ g cm−2 S−1) | NS | 1.8 ± 0.04** | 1.5 ± 0.01** | 0.1 ± 0.04* | 1.42 (3) | |||
| HS | 3.1 ± 0.35** | 1.2 ± 0.11** | 4.7 ± 0.47** | 3.3 ± 0.47** | 2.22 (2) | |||
| LF (%) | NS | 15.2 ± 0.50** | −5.5 ± 0.08** | −12.6 ± 0.54** | −6.1 ± 0.51** | 0.47 (2) | ||
| HS | 37.4 ± 1.13** | −18.9 ± 0.38** | −30.8 ± 1.37** | −6.1 ± 1.23** | 1.32 (2) | |||
| EL (cm) | NS | 8.6 ± 0.39** | 1.3 ± 0.08** | 9.8 ± 0.47** | 4.2 ± 0.40** | 0.01 (2) | ||
| HS | 8.7 ± 0.44** | 1.2 ± 0.10** | 7.9 ± 0.55** | 3.1 ± 0.46** | 1.20 (2) | |||
| KPE | NS | 104.8 ± 4.27** | 113.0 ± 0.98** | 239.4 ± 5.11** | 109.0 ± 4.42** | 9.5 ± 4.00* | 0.21 (1) | |
| HS | 87.9 ± 16.20** | 118.8 ± 1.58** | 684.2 ± 40.13** | 261.7 ± 16.11** | −275.8 ± 25.10** | 0.35 (1) | ||
| HGW (g) | NS | 20.6 ± 0.13** | −2.3 ± 0.12** | 5.2 ± 0.73** | −4.3 ± 0.79** | 1.77 (2) | ||
| HS | 20.0 ± 0.15** | −2.7 ± 0.14** | 2.9 ± 0.83** | −2.0 ± 0.88* | 0.86 (2) | |||
| GYPP (g) | NS | 65.5 ± 0.51** | 29.7 ± 0.51** | 68.5 ± 4.66** | −10.0 ± 2.71** | −22.9 ± 4.73** | 3.80 (1) | |
| HS | 51.4 ± 0.82** | 33.3 ± 0.82** | 79.3 ± 6.23** | −12.6 ± 3.74** | −30.6 ± 6.21** | 3.65 (1) |
*,**
Significant at P ≤ 0.05, 0.01, respectively.
NS, Non-stressed; HS, Heat-stressed; m, Mean; [d], Additive; [h], Dominance; [i], Additive-additive; [j], Additive-dominance; [l], Dominance-dominance; χ2, Chi-square; DF, Degrees of freedom; LT, Leaf temperature (°C); CMT, Cell membrane thermo-stability (%); TR, Transpiration rate (μg cm−2 S−1); LF, Leaf firing (%); EL, Ear length (cm); KPE, Kernels per ear; HGW, 100-grain weight (g); GYPP, Grain yield per plant (g).