Genetic Analysis and Mapping of Blast-resistance Genes in japonica Rice Yunyin from Yunnan Province
Zhang Jianfu 1 Wang Guoying 1** Xie Hua'an2 Ling zhongzhuan3
(1. State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094,China; 2. Fujian Academy of Agricultural Sciences, Fuzhou 350003, China; 3. Institute of Crop Breeding and Cultivation, China Academy of Agricultural Sciences, Beijing 100081, China)
Abstract：Abstract: A new blast-resistant, japonica rice, Yunyin, was identified with 8 races of Pyricularia grisea (Cooke) Sacc). The results showed that Yunyin was resistant to 8 blast races. Yunyin was crossed with a blast-susceptible rice variety Lijiangxintuanheigu. Both parents and their progeny (F1, F2 and F3) were inoculated with 8 races of Magnaporthe grisea by injection in the field. The results showed that the blast-resistance to the 8 races in Yunyin was controlled by single gene. A blast-resistant locus to Sichuan-43 was mapped in chromosome 11 by SSR marker. The linkage value was 3.8 cM with RM202.
