抗稻瘟病新种质R_(917)的抗瘟基因遗传分析及其转育研究

BLAST RESISTANT GENE ON RICE MUTANT R 917 AND ITS TRANSLATION

R 917 is a new rice variety with strong blast disease resistance. The resistance genes of R 917 and its parents,Chengte 232 and Xiushui 37, were analysed with blast races of Pyricularia oryzae ZB 13 , ZC 15 and ZE 3. The results showed that only one dominant gene controlled the resistance to the three blast races in R 917 . Allelism test indicated that the resistant gene of R 917 was nonallelic with its parents. The blast resistance was tested by inoculating with 7 Japanese strains.R 917 was highly resistant to the all. The allelism test also indicated that the resistant gene of R 917 was nonallelic with Toride 1. The reaction with some strains between R 917 and Toride 1 indicated that the blast resistant gene of R 917 is different with the 14 genes that was reported in Japan. The identification of the disease resistance for the progenies of R 917 crosses with XS861 showed that R 917 could be used as a good material for resistance to rice blast in rice breeding.