摘要： 对36个水稻骨干系进行了RFLP（限制性内切酶长度多态性）分析，并对这些水稻材料的162个杂交组合育性进行了分组分类研究。杂种育性的遗传基础研究表明，亚种内杂交组合育性显着高于亚种间杂交组合育性。亚种间杂交不育性是由籼粳两个亚种间深刻的遗传分化引起的。广亲和性品种为亲本之一的杂交组合多数（71.7%）具有正常的育性，RFLP分析表明，这些杂交组合的遗传基础特殊，其遗传距离大于典型的亚种内组合距离，而小于典型的亚种间遗传距离。广亲和性水稻种质的创建、改造和利用潜力是大的，广亲和基因作用及其与杂种优势表现有关的若干遗传育种学问题要协同一并去解决。

关键词: 水稻, 限制性内切酶长度多态性, 杂种不育性, 广亲和性品种

Abstract: RFLP analysis was carried out on 36 rice elite line. Sterility of these 162 rice hybrids was studied in groups and in types. The study on genetic basis of hybrid sterility showed that intra subspecific hybrids had much higher spikelet fertility than inter subspecific hybrids,whose sterility was caused by extensive genetic differentiation of indica and japonica rice.RFLP analysis showed that most of rice hybrids (71.7%) one of whose parents was wide compatibility varieties had nomal hybrid sterility. The genetic basis of these rice hybrids was special. Their parental distance was farther than typical intra subspecific hybrids, and less than typical inter subspecific hybrids. The study also showed that establishment, improvement and utilization potentialities of wide compatibility gene and some of its genetic breeding problems related to heterosis performance needed to be solved together.

Key words: Rice, Restriction fragment length polymorphism (RFLP), Hybrid sterility, Widecompatibility varieties

中图分类号: 

• S511