Abstract: Two F₁ between varieties, three and eight ones between indica and japonica with or without wide compatibility (WC) respectively were used, and male and female fertility of generations P₁, P₂, F₁, F₁×P₁, F₁×P₂, Zhenshan 97A×F₁ were analysed. The results showed that: 1) Male or female sterile of F₁ crossed between varieties weren't observed and their pollen fertility and seed setting percentage were normal. 2) Pollen fertility of F₁ crossed between indica and japonica was lower than that of parents significantly and the seed setting percentage of generation of Zhenshan 97A×F₁, F₁×(P₁,P₂) didn't reach normal level after artifical pollination; Male and female sterile of those combinations were observed, in former sterile percentage was higher in male than female and its range was less in latter than in former. 3) Male or female fertility of F₁ between indica and japonica were promoted through using wide compatible gene, and their wide compatibility are different in various intersubspecific combinations.

Key words: Female sterility, Indica and japonica hybrid, Male sterility

关键词: 亚种间杂种, 水稻, 配子育性, 雄性不育