【摘要】 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更多还原

【Abstract】 The 110 isolates of Piricularia oryzae in Heilongjiang Province were classified into 4 groups and 7 races by 7 Chinese differential cultivars and into 77 races by 12 mono resistant gene differential caultivars of Kiyosawa (Japan). High virulence frequence (70.4% 89%) occurred with genotypes of+, ti a, Pi k, Pi z, and those races were widely distributed over all rice production areas of the Province. Low virulence frequency (0 19.3%) occurred with genotypes of Pi t, Pi b and Pi zt. These three genes could be used for blast resistant breeding. Differentials of Kiyosawa were suitable for differentiating races of Piricularia oryzae in Heilongjiang Province.更多还原