近十年广东稻瘟病菌生理小种变化分析

从2006-2015年近10年间收集的来自广东各地的7225份穗颈瘟样本中分离出稻瘟病菌（Ｍａｇｎａｐｏｒｔｈｅｏｒｙｚａｅ）单孢菌株3690个，经接种到中国水稻稻瘟病菌鉴别品种上共鉴定出8群51个生理小种，其中以ZB群、ZC群和ZG群为主要优势种群，而ZB群出现频率最高，为48.44％～75.35％；病菌生理小种以ZB13、ZB15、ZC15、ZC13和ZG1为主要优势小种，其中ZB13出现频率最高，为32.47％．

Analysis of physiological races of Magnaporthe oryzae in Guangdong during recent decade

A total of 3, 690 isolates of Magnaporthe oryzae were collected from Guangdong province during 2006-2015 and were identified. The results showed that 8 groups and 51 physiological races were identified by inoculating them onto Chinese differential varieties of rice. Among them, ZB, ZC and ZG were the dominant groups, whereas ZB group showed the highest frequency with an average frequency between 48. 44% and 75. 35% with regard to the physiological race, ZB13, ZB15, ZC15, ZC13 and ZG1 were the dominant races, among them, ZB13 had the highest frequency of 32. 47%.