Abstract: Using maintainer lines as testers of wide compatibility(WC) proved to be helpful for the development of indica-japonica hybrid rice in three-line system. Maintainer lines Digu, Zhenshan 97, Hanfeng and 76-27, when used as testers, could reveal WC differences among different varieties. The two parental lines, male sterile and restorer lines, carrying the identical or different WC genes would be useful for improvement of seed set on an indica-japonica hybrid rice.

Key words: indica-japonica hybrid rice, tester, wide compatibility

关键词: 籼粳杂交稻, 测验种, 广亲和性