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利用培矮６４Ｓ等５个籼型两用不育系与明恢６３等１４个籼型或广亲和品种共配成６０个两系杂交水稻组合，分析了各不育系杂种８个主要农艺性状的杂种优势。结果表明：５个两用不育系的杂种均具有明显的产量超亲优势和一定比例的产量竞争优势组合，其中以ＹＳ－１最高，其次为测６４Ｓ和培矮６４Ｓ；６０个Ｆ１代组合中，具产量竞争优势的组合共９个，其中以安湘Ｓ×ＹＲ１５、ＹＳ－１×湘香籼６号、培矮６４Ｓ×ＹＲ１０等５个组合的产量竞争优势最高。
A total of 60 two-line hybrid rice combinations were obtained from five indica type sterile lines including Pei'ai 64S and 14 indica or broad compatible varieties including Minghui 63. Eight main agronomic traits Heterosis of traits. The results showed that the hybrids of five dual-use sterile lines all had obvious super-pro-yield heterosis and a certain proportion of yield competitive combinations, of which YS-1 was the highest, followed by 64S and Pei'ai 64S, and 60 F1 combinations Among them, there were 9 combinations with yield competitive advantages, of which 5 combinations including Xiangxiang S × YR15, YS-1 × Xiangxianxian 6 and Peiwa 64S × YR10 had the highest yield competitive advantage.