摘要
通过与8个日本鉴别品种杂交和利用日本代表菌系研54-04及我国南方稻区菌系95-h接种鉴定,研究了籼稻品种浙辐802的抗性遗传。研究结果表明,该品种对菌系研54-04的抗性由 2对显性基因控制,对菌系 95-t2的抗性由 1对显性基因控制。基因等位性分析确认,浙辐802中抵抗95-t2的抗病基因与Pi-i基因等位,与Pi-a、Pi-sh、Pi-k、Pi-z、Pi-b、Pi-t、Pi-ta等已知基因位点为非等位关系;抵抗菌系研54-04,感染菌系95-t2的基因与Pi-i、Pi-k、Pi-b、 Pi-t 4个已知基因位点为非等位关系。对这个基因与其他已知基因的等位性进行了分析,认为它可能是1个未被命名的新基因。
One indica variety, Zhefu 802, was studied for its inheritance of blast resistance by inoculation of two strains Ken54ro4 and 95-t2. The B1F1 and F2 populations from cross of Zhefu 802(R) X Lijiangxintuanheigu (S) and related parents were inoculated by spray inoculation method with the two above mentioned strains to determine R;S ratio of segregating populations of this cross. The results indicated that Zhefu 802 has two dominant resistance genes to strain Ken 54-04. One of the two genes showed resistant reaction and the other is susceptible to strain 95-t2. The allelism test indicated that one gene in Zhefu 802, which showed resistant reaction to strain 95-t2, is allelic to Pi-i gene locus and non-allelic to loci of Pi-a, Pi-sh, Pi-k Pi-z, Pi-ta, Pi-b, Pi-t. The other gene in mis variety was also estimated to be different from all of the known genes. So it may be an unknown gene. But thes point needs to be confirmed further.
基金
国家"攀登计划"项目!(05-02-2)
国家自然科学资助!39670452
关键词
稻瘟病
籼稻
遗传
抗瘟性
rice blast disease, indica rice, inheritance