Table 2.
Mean trait values and standard deviation of the parent lines, reference F1s, and segregating populations.
| Type | Namea | Traitb | |||||
|---|---|---|---|---|---|---|---|
| NP | NGP | NSP | SF (%) | TGW (g) | GY (g) | ||
| Parent line | TQ | 8.1 ± 2.1 | 200.4 ± 17.8 | 227.1 ± 30.2 | 88.5 ± 4.0 | 26.7 ± 0.0 | 33.1 ± 0.1 |
| IRBB52 | 11.2 ± 0.8 | 105.1 ± 33.1 | 130.1 ± 49.5 | 81.9 ± 5.6 | 25.5 ± 1.2 | 26.2 ± 4.3 | |
| IRBB59 | 12.9 ± 1.8 | 100.0 ± 28.0 | 117.3 ± 42.0 | 86.6 ± 7.0 | 26.5 ± 0.2 | 30.2 ± 3.0 | |
| Zh9B | 8.6 ± 0.3 | 65.9 ± 26.6 | 107.7 ± 30.9 | 60.0 ± 7.6 | 22.3 ± 2.4 | 11.6 ± 6.0 | |
|
| |||||||
| Reference F1 | Zh9A/TQ | 10.6 ± 2.4 | 178.6 ± 56.7 | 225.5 ± 96.0 | 81.2 ± 9.5 | 26.5 ± 0.3 | 44.0 ± 0.9 |
| Zh9A/IRBB52 | 10.4 ± 2.3 | 131.6 ± 34.4 | 174.0 ± 59.7 | 76.7 ± 6.3 | 26.9 ± 0.9 | 31.7 ± 0.2 | |
| Zh9A/IRBB59 | 12.8 ± 2.2 | 139.7 ± 15.2 | 175.4 ± 50.2 | 81.9 ± 14.5 | 27.8 ± 0.4 | 44.1 ± 6.8 | |
|
| |||||||
| Population | RIL | 9.7 ± 1.1 | 137.1 ± 20.9 | 162.7 ± 26.0 | 85.4 ± 5.2 | 25.8 ± 2.7 | 29.5 ± 3.8 |
| TC | 9.6 ± 1.2 | 140.1 ± 20.5 | 194.0 ± 18.7 | 73.1 ± 8.6 | 26.5 ± 1.6 | 30.8 ± 5.3 | |
|
| |||||||
| Derivative | HMP | 0.5 ± 1.1 | 38.9 ± 17.5 | 59.2 ± 12.0 | 0.3 ± 7.9 | 2.5 ± 0.7 | 10.4 ± 4.9 |
| TC-RIL | −0.05 | 3.03 | 31.29∗∗ | −12.38∗∗ | 0.72∗∗ | 1.33∗∗ | |
aTQ, Teqing; Zh9B, Zhong 9B; Zh9A, Zhong 9A; RIL, recombinant inbred line; TC, testcross F1; HMP, mid-parent heterosis; TC-RIL, increase of trait value in TC over its corresponding RIL.
bTrait values are presented as mean ± sd. NP, number of panicles per plant; NGP, number of grains per panicle; NSP, number of spikelets per panicle; SF, spikelet fertility; TGW, 1000-grain weight; GY, grain yield per plant. ∗∗Significant at P < 0.01.