Molecular Detection and Analysis of Blast Resistance Genes in Rice Main Varieties in Jiangsu Province, China

Rice blast, caused by Pyricularia oryzae, is one of the most destructive rice diseases worldwide. Using resistant varieties cost-effective way to control disease, and it crucial analyze resistance level genes distribution main varieties. In this study, we collected 119 in Jiangsu province evaluated leaf panicle blast found that indica was more than japonica rice. Moreover, detected 14 (R genes) The frequencies three R genes, Pish, Pit, Pia, were higher 80%, Pigm had lowest frequency (1.68%), followed Pi2 (15.18%) Pi5, Piz-t (24.37%). Combined with multiple stepwise regression contribution rate, eight major Pita, Pi9, Pib, Pb1, Pikm, Piz-t, significantly affected rice, also six gene combinations 100% rate could effectively increase summary, monitoring analyzing their beneficial for breeding.