论文部分内容阅读
利用10个恢复系和8个不同可恢性的不育系组成8×10不完全双列杂交,对恢复系花粉可育性进行了配合力及遗传力分析。结果表明:①不同恢复系对不育系花粉育性恢复有较大差异;②恢复系对不育系的育性恢复占主导地位,不育系有一定作用;③杂交水稻花粉可育性遗传以加性效应为主,属数量性状,且恢复系花粉可育性占主导地位;④以花粉育性为性状选育恢复系时,用一般配合力比用特殊配合力更准确;⑤花粉育性的广义遗传力较高,但狭义遗传力偏低,说明花粉育性仍受环境的一定影响;⑥测定恢复系或不育系花粉育性,全穗花粉育性比部分花粉育性更准确;⑦如以花粉育性作为恢复力指标,利用MR66、泸恢17、多恢57作亲本,易选育出恢复力较高的恢复系和优势较强的杂交组合。
The combining ability and heritability of the restorer lines for pollen fertility were analyzed by using 8 × 10 incomplete diallels with 10 restorer lines and 8 CMS lines. The results showed that: ① different restorers had greater difference in the restore of pollen fertility of CMS; ② restorer had the predominant effect on the fertility restoration of male sterile lines and CMS; ③ the inheritance of pollen fertility in hybrid rice The additive effect is dominant, which is a quantitative trait, and the pollen fertility of the restorer system dominates. ④ When using the pollen fertility as the trait for breeding the restorer line, the general combining ability is more accurate than the special combining ability. The genetically broad heritability is higher, but the narrow heritability is lower, indicating that pollen fertility is still affected by the environment. ⑥It is more accurate to determine the pollen fertility of restorer lines or sterile lines than the part of pollen fertility ; ⑦If pollen fertility was used as an indicator of resilience, MR66, Luhui17 and Duhui57 were their parents, and the restorer lines with higher restoring ability and the superior hybrid combinations were easy to select.