Six different magnaporthe oryzae isolates were used to test the resistance of Jiazao 324, an indica rice variety, and a representative isolate was selected to analyse the inheritance of Jiazao 324's reistance. The results indicated that a single major R gene responsible for its resistance to the isolate, the corresponding R gene were mapped between SSR markers RM136 and RM7213 on the short arm of rice chromosome 6. The results were helpful for the utilization of Jiazao 324.
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