二个粳稻品种抗稻瘟病遗传特性的分析

本文用累积分布曲线法对东农 363及农东415两个粳稻品种进行了抗稻瘟遗传分析,结果表明东农363对Hokul菌株的抗性是由一对显性抗性基因控制的,东农415对Ken53-33菌株的抗性是由两对互补的显性基因控制的;对Ina72菌株的抗性是由两对显性基因控制的,其中一对控制高抗反应,另一对控制中抗反应。两个杂交组合的正反交分析结果表明,水稻对稻瘟病菌的抗性遗传是由细胞核控制的,细胞质在抗瘟遗传中的作用在本试验的测试品种中并没有表现出来。Abstract:By means of cumulative distribution curve methods,two Japonica varieties Dongnong 363 and Dongnong 415 were analysed for the inheritance of blast resistance.The results showed that the resistance of Dongnong 363 variety to Hokul blast strain was controlled by one dominant gene.The resistance of Dongnong 415 to Ken53-33 strain was controlled by two complementary dominant genes,to Ina72 strain was controlled by two dominant genes,one dominated over the high-resistant and the other over the middle-resistant.Genetic analysis of F3 plants of two reciprocal crosses showed that the resistance to the rice blast disease was controlled by nuclear gene,no cytoplasmic effect was found in the tested varieties.

Genetic Analysis for Blast Resistance of Two Japonica Rice Varieties

By means of cumulative distribution curve methods, two Japonica varieties Dongnong363 and Dongnong 415 were analysed for the inheritance of blast resistance. The results showed that the resistance of Dongnong 363 variety to Hoku1 blast strain was controlled by one dominant gene. The resistance of Dongnong 415 to Ken53-33 strain was controlled by two complementary dominant genes, to Ina72 strain was controlled by two dominant genes, one dominated over the high-resistant and the other over the middle-resistant. Genetic analysis of F 3 plants of two reciprocal crosses showed that the resistance to the rice blast disease was controlled by nuclear gene, no cytoplasmic effect was found in the tested varieties.