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应用３个籼稻、４个粳稻组成的中国鉴别品种将黑龙江省１１０个稻瘟病菌菌株划分为４群７个生理小种。用日本清泽的１２个单基因抗性鉴别品种将上述菌株划分为７７个生理小种。对＋、ｔｉ－ａ、Ｐｉ－ｋ、Ｐｉ－ｚ基因致病频率高（７０．４％～８９％）的生理小种遍布全省各稻区；对Ｐｉ－ｔ、Ｐｉ－ｂ、Ｐｉ－ｚｔ基因致病频率低（０～１９．３％）的生理小种分布窄，这３个基因可用于抗病育种。试验表明应用日本清泽的１２个粳稻单基因抗性鉴别品种更适宜黑龙江省稻瘟病菌生理小种的鉴定
Three Chinese indica rice varieties and four japonica cultivars were used to divide 110 M. grisea isolates in Heilongjiang Province into four groups of seven races. The above strains were divided into 77 physiological races with 12 monogenic resistance discriminant cultivars in Qingze, Japan. Physiological races with high frequencies (70.4% ~ 89%) of +, ti-a, Pi-k and Pi-z genes were found in all rice regions in the province. The zt gene has a narrow distribution of physiological races with low frequency (0 ~ 19.3%). These three genes can be used for disease resistance breeding. The results showed that 12 japonica rice varieties with single gene resistance were more suitable for the identification of the physiological races of Magnaporthe grisea in Heilongjiang Province