摘要
以ZA_(15)和ZB_(11)等2个致病小种对6个抗稻瘟病体细胞突变体进行了抗性遗传分析。结果表明,86-S1、88-86、88-42和88-40等4个突变体对ZA_15、ZB_(11)小种的抗性分别由1个显性基因控制,同时这2个抗性基因还存在紧密的连锁关系。88-127和88-145对ZA_15的抗病性受2个重复显性基因控制;而对ZB_(11)的抗性则分别受2个互补显性基因和1个显性基因控制。等位性测定表明,86-S1、88-42和8B-86等3个突变体具有的抗性基因是等位的,可能是Pi-(?)或与之等位的抗性基因。
Genetic analysis of six blast-resistant somaclonal mutants was carried out for their blast resistance by using varieties Li-jiang-xin-tuan-hei-gu (LJXTHG) and Bi-jing 7 (BJ 7) as the blast-susceptible parent and two Chinese blast strains, ZA15 and ZB11 as the tester. The results showed that four mutants, 88-42, 88-40, 88-86 and 86-S1, has one dominant gene for ZA15 and ZB11 races respectively and these genes are closely linked. Mutant 88-127 has two dominant duplicate resistant genes for ZA15 and two dominant complementary resistant genes for ZBn. Mutant 88-145 has two dominant duplicate resistant genes and one dominant gene for ZA15 and ZB11, respectively. Allelism test indicated the genes of mutants 88-86, 88-42 and 86-S1 are allelic and they may be Pi-zt or a new allele at the Pi-zt locas.
基金
国家自然科学基金
关键词
水稻
稻瘟病
遗传
抗性遗传
Oryza saliva L., Pyricularia oryzae Cav., Inheritance
