Abstract: The heritability and combining ability of blast resistance, the number of effective panicles, amylosecontent and gelatinization etc. were studied by means of diallel analysis in ten rice cultivars with blast resistanceand/or good quality. The results show that blast resistance, amylose content and gelatinization are mainly controlled by additive gene effect. The number of tillers per plant, the number of panicles per plant, the length of panicle and plant height are controlled by both additive and non additive effect. Waixuan 35 is a cultivar with good resistance to blast, good shape of grains and strong combining ability and heritability of resistance but not good for gelatinization and amylose content. In our results we found another cultivar Erbazhan which combined resistance andtraits of good quality very well. The good effects of the general combining ability in Erbazhan are significant andvery significant at both of resistance and quality. Erbazhan may be used as a new source of resistance material.Meanwhile, when we use Erbazhan as a parent in the rice breeding program of resistance and good quality and highyield, it is better to select another parent that have negative general combining ability in plant height and big variance in general combining ability effect in order to improve the resistance to lodging.

Key words: blast resistance, combining ability, heritability, quality, resistance to loding

摘要： 选用10个优质的或抗稻瘟病的品种，通过双列分析研究了稻瘟病抗性、有效穗、直链淀粉含量和胶稠度的遗传和配合力进行了分析。结果表明，稻瘟病抗性、直链淀粉含量和胶稠度主要受加性基因效应控制。每株分蘖数、穗数、穗长和株高既受加性效应也受非加性效应控制。外选35是具有抗稻瘟病、粒形美观和高配合力和抗性遗传力强的品种，但在胶稠度和直链淀粉上不佳。试验还发现，二八占抗性和米质性状结合较好，其抗性和米质的一般配合力效应均较显著，可以作为新的抗性材料。

关键词: 稻瘟病抗性, 品质, 抗倒性, 配合力, 遗传力