Table 5. The self-crosses of F1 generation from cross-breeding of the YH and SY populations.
| Treatment | Replications | No. eggs laid/female | Hatchability |
| F1(YS)♀×F1(YS)♂ | 0 | — | — |
| F1(SY′)♀×F1(SY′)♂ | 1 | 315 | — |
| F1(YH)♀×F1(YH)♂ | 8 | 465±16.62 | 0.82±0.03 |
| F1(SY)♀×F1(SY)♂ | 8 | 453±37.99 | 0.72±0.10 |
Data shown in the table are mean ± SE. There were no significant differences at the 0.01 level between mean values within columns. The YS is the F1 generation from cross-breeding of YH♀×SY♂, and the SY′ is the F1 generation from cross-breeding of SY♀×YH♂. “—” means none, that is the YS couldn't emerge within three days and therefore produced no eggs with no hatching, and the SY′ produced extremely few eggs with no hatching.