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通过６个水稻广亲和品种的双列杂交研究了籼粳杂交的小穗育性遗传。结果表明：品种０２４２８、培矮６４、广亲２１、Ｌｅｍｏｎｔ、培Ｃ３１１，红壳老鼠牙及其杂种Ｆ１和Ｆ２的小穗育性均超过８０％，只有培矮６４与广亲２１的杂种Ｆ１、培矮６４和Ｌｅｍｏｎｔ的杂种Ｆ２、广亲２１与红壳老鼠牙的杂种Ｆ２的小穗育性低于７５％，说明品种培矮６４与广亲２１的广亲和性可能受同其它４个品种位点不等位基因的控制。依据Ｄｕｄｌｅｙ模型计算其它４个品种分别对０２４２８／培矮６４、广亲２１／Ｌｅｍｏｎｔ、培Ｃ３１１／红壳老鼠牙的遗传参数μＢ间、μＣ间、μＤ间、μＥ间、μＦ间和μＧ间差异不显著，表明水稻籼粳杂交的小穗育性的表达受主基因的控制，广亲和基因的数目和种类在各品种间是相同的。
Spikelet fertility in indica-japonica hybrids was studied by the double crosses of six wide compatibility varieties. The results showed that the spikelet fertility of varieties 02428, Pei’ai 64, broad pro 21, Lemont, Pei Caili, red shell mouse teeth and their F1 and F2 hybrids exceeded 80% , Pei’ai 64 and Lemont’s F2, Guang-21 and red shell mouse hybrid F1 hybrid spikelet fertility of less than 75%, indicating Pei-breed 64 and wide pro 21 wide compatibility may be affected by other 4 A variety of locus not controlled by alleles. According to the Dudley model, the genetic differences among μB, μC, μD, μE, μF and μG of 02428 / Peiai64, Cantonese 21 / Lemont and PeiChi1111 / Not significant, indicating that the expression of spikelet fertility in indica-japonica hybrid rice is controlled by the major genes. The number and variety of broad-compatibility genes are the same among varieties.