三个粳稻品种的稻瘟和白叶枯病抗性遗传分析

分析了城特232、嘉23和浙湖8号等3个粳稻品种对稻瘟病菌ZD_1、ZE_1和ZF_1及白叶枯病菌8810-1的抗性遗传。结果表明,3个抗病亲本对ZD_1和ZF_1的抗性都带有2对显性重复基因,等位性测定表明其中至少有1对是等位的。对ZE_1小种的抗性均受1对显性基因控制,等位性分析三者的抗性基因各不相同。城特232和嘉23对白叶枯病抗性是由1对显性基因控制,而浙湖8号为2对显性互补基因控制。等位性测定表明城特232和嘉23的1对基因是等位的,但与浙湖8号的2对抗性基因是不等位的。推断了抗病亲本的可能的抗性基因。

Genetic Analysis of Blast and Bacterial Blight Resistance in Three japonica Rice Varieties (Oryza sativa)

Inheritance on resistance of three japonica varieties Cheng-Te 232, Jia 23 and Zhe-Hu 8 to blast races ZD_1, ZE_1 and ZF_1 and 8810-1 isolate of bacterial blight was analysed. Three resistant parents had two dominant duplicate resistant genes to ZD_1 and ZF_1 races and according to allelism test at least one of them was allelic. They had different single dominant gene respectively to ZE_1 race. The bacterial blight resistance of Cheng-Te 232 and Jia 23 was controlled by a single dominant gene, and two dominant complementary genes for Zhe-Hu 8.Allelism test indicated the genes of Cheng-Te 232 and Jia 23 were allelic and nonallelic to those of Zhe-Hu 8.These resistant genes of diseases of resistant parents were deduced.And the utilization of three resistant parents in disease resistance breeding was discussed.