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对8个不育系、12个恢复系配制获得的18个杂交水稻组合千粒重性状的遗传进行了研究,结果表明:(1)通过方差分析法得到千粒重广义遗传力为98.96%,通过F2代单株千粒重与F3代家系平均值相关分析法得到的遗传力为82.5%,说明千粒重性状遗传力较高;(2)10个组合的杂种一代千粒重表现正向均亲优势,其中有3个组合表现一定程度的正向超亲优势;(3)参试组合中有7个组合杂种一代千粒重表现正向部分显性效应,3个组合表现超显性效应,其余组合表现负向部分显性效应。
The inheritance of 1000-grain weight traits in 18 hybrid rice combinations obtained from 8 CMS lines and 12 restorer lines was studied. The results showed that: (1) The general heritability of 1000-grain weight was 98.96% by ANOVA, The heritability obtained from the correlation analysis between the 1000-grain weight and the F3 generation pedigree was 82.5%, which indicated that the inheritance of 1000-grain weight traits was high. (2) The 10-generation hybrids had the positive mean progeny, of which 3 combinations (3) In the tested combinations, seven hybrids showed the positive part dominant effect, the three combinations showed the super dominant effect, while the other combinations showed the negative part dominant effect.