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用５个籼型不育系与５个偏粳型恢复系，２５个双列杂交组合。测定了经济产量的配合力，研究了１０个数量性状的相关遗传参料，分析和比较了各性状的广义、狭义、现实遗传力及相关遗传力，并估算了各性状对单株产量的相关遗传变异贡献率及其间接选择的相对效率，同时进行了主成分分析。结果表明：（１）籼粳杂交组合的特殊配合力效应与亲本一般配合力效应的趋势不完全一致；（２）杂交Ｆ１代的大部分性状的狭义、现实遗传力较高，稳定性较好，但性状间的相关关系又比较复杂，因而在育种中要注意性状的单一和整体的关系；（３）千粒重、株高、稻粒比重、着粒密度对杂交Ｆ１代产量的构成和影响起着重要的作用。
Five indica CMS lines, five japonica japonica restorer lines and 25 double crosses were used. The combining ability of economic yield was determined, the related genetic parameters of 10 quantitative traits were studied, the generalized, narrow sense, actual heritability and heritability of each trait were analyzed and compared, and the correlation between each trait and yield per plant was estimated The contribution rate of genetic variation and the relative efficiency of indirect selection, at the same time, the principal component analysis was carried out. The results showed that: (1) The specific combining ability of indica-japonica hybrid combinations did not completely accord with the trend of general combining ability of parents; (2) Most traits of F1 hybrids had narrow sense and high heritability and stability , But the correlation between the traits is rather complicated. Therefore, we should pay attention to the single and whole relationship of traits in breeding. (3) The composition and influence of 1000-grain weight, plant height, grain weight and grain density on F1 generation Important role.