黑龙江省稻瘟病菌生理小种的鉴定

以中国鉴别品种、日本清泽粳型单基因系鉴别品种和中国单基因近等基因系鉴别品种为试验材料,对黑龙江省139个菌株进行鉴定研究,并通过这3套鉴别品种对黑龙江省稻瘟病菌生理小种的鉴别作用进行了评价。结果表明：139个稻瘟病菌株被中国7个鉴别品种划分为6群14个小种,被日本清泽12个单基因系鉴别品种划分成58个小种,被中国6个单基因近等基因系鉴别品种分成26个小种;日本清泽单基因系鉴别品种和中国单基因近等基因系鉴别品种鉴别作用优于中国统一的7个鉴别品种,鉴别作用明显;在黑龙江省可用于抗病育种的基因有Pi-zt、Pi-b和Pi-t;在黑龙江省应该提倡应用中国单基因近等基因系鉴别品种进行稻瘟病菌生理小种鉴定。

Identification of the Physiological Race of Pyricularia grisea in Heilongjiang Province

The 139 isolates collected from rice in Heilongjiang were studied with three sets of differentials,and the function of the three set of differentials on Heilongjiang Pyricularia grisea was appraised.The results showed that the 139 isolates of Pyricularia grisea in Heilongjiang province were classified into 6 groups and 14 races by 7 Chinese differential cultivars and into 58 races by 12 mono-resistant gene differential cultivars of Kiyosaw a＇s differential varieties（KDV）and 26 races by 6 Chinese near-isogenic lines（NILs）.KDV and Chinese NILs showed much stronger differentiating ability than the Chinese differential cultivars.Three genes（Pi-zt,Pi-b and Pi-t）could be used for blast resistant breeding in Heilongjiang province.Chinese NILs should be promoted the application for race identification of rice blast fungus in Heilongjiang province.