Table 2. Trait heterosis analysis of F1 hybrid progeny.
| Items | Mean | Variable coefficient (CV) | Mid-parent heterosis | Heterobeltiosis | ||
|---|---|---|---|---|---|---|
| BOZOISKY SELECT (♂) | XJ-ALT (♀) | F1 | ||||
| Tiller height (cm) | 128.67 ± 4.22Aa | 109.40 ± 4.93Aa | 126.94 ± 4.42Aa | 12.67% | 6.64% | −1.34% |
| Nutritional tiller number | 95.00 ± 5.93Bab | 31.33 ± 5.92Cb | 171.43 ± 12.36Aa | 34.14% | 171.39% | 80.45% |
| Second leaf length (cm) | 20.70 ± 0.83Aa | 17.94 ± 1.22Aa | 22.65 ± 1.29Aa | 17.89% | 17.21% | 9.40% |
| Second leaf width (cm) | 0.34 ± 0.03Aa | 0.34 ± 0.03Aa | 0.35 ± 0.01Aa | 16.40% | 2.48% | 1.49% |
| Reproductive tiller number | 41.33 ± 1.93Bb | 17.67 ± 2.38Cc | 63.81 ± 5.55Aa | 70.18% | 116.31% | 54.39% |
| Spike length (cm) | 10.00 ± 0.15Aa | 9.11 ± 0.07Aa | 10.03 ± 0.24Aa | 15.26% | 4.90% | 0.25% |
| Spike width (cm) | 0.71 ± 0.00Aa | 0.65 ± 0.00Ab | 0.59 ± 0.02Bc | 13.24% | −12.79% | −16.27% |
| Spikelet number per spike | 34.33 ± 0.42Aa | 26.33 ± 0.16Ab | 30.93 ± 0.57Bc | 13.82% | 1.98% | −9.90% |
| Seed number per spike | 126.25 ± 3.18Aa | 41.31 ± 0.34Cc | 84.23 ± 3.83Bb | 33.30% | 0.29% | −33.49% |
| Seed number per plant (/1,000) | 3.55 ± 0.79Aa | 0.77 ± 0.08Bb | 5.87 ± 0.58Aa | 99.58% | 143.17% | 44.72% |
| Seed weight per spike (g) | 0.27 ± 0.00Aa | 0.11 ± 0.01Cc | 0.23 ± 0.02Bb | 39.22% | 18.48% | −16.65% |
| Thousand kernel weight (g) | 2.22 ± 0.02Bb | 2.00 ± 0.00Bb | 2.88 ± 0.11Aa | 15.75% | 36.80% | 30.11% |
| Means | 31.90% | 47.24% (+) | 31.54% (+) | |||
| −12.79% (−) | −15.53% (−) | |||||
Note:
(+), The average of positive numbers; (−), The average of negative numbers. Different lowercase letters in the same line indicate significant differences at the p < 0.05 level, different uppercase letters in the same line indicate extremely significant differences at the p < 0.01 level.