云南省玉米小斑病菌生理小种的初步鉴定  

Preliminary identification of physiological races of Bipolaris maydis in Yunnan

作　　者：王利智[1,2] 康志钰[1] 吴毅歆[1,2] 周惠萍[2] 毛自朝[1] 何月秋[1,2] 

机构地区：[1]云南农业大学农学与生物技术学院,云南昆明650201 [2]云南农业大学教育部农业生物多样性与病虫害控制重点实验室,云南昆明650201

出　　处：《云南大学学报（自然科学版）》2010年第3期352-357,共6页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省支撑计划项目资助(2006NG19);云南省产业体系项目资助

摘　　要：从云南省13个地区42个县(市)采集玉米小斑病样本,分离出113个单孢菌株,并在中国鉴别品种上开展了生理小种鉴定.结果表明,玉米小斑病菌生理小种O,C,S和T小种在云南省均有分布,O小种是优势小种,且O小种菌株具有不同致病力,中等致病力菌株和弱致病力菌株频率明显高于强致病力菌株.此外,生理小种类型在不同海拔上分布存在差异,S小种多分布于高海拔地区.One hundred and thirteen isolates of Bipolaris maydis,collected from 13 prefectures including 42 counties or cities in Yunnan,were identified based on their pathogenic types on the Chinese Differentials.The results showed that 4 physiological races O,S,T and C existed in Yunnan,and among them Race O was dominant and had different pathogenicities.Medium and weak pathogenic isolates of Race O was significantly more than those of the strong one.Besides,there was discrepancy about distribution of physiological races of B.maydis at different altitudes,especially Race S distributed at high altitude.

关 键 词：玉米小斑病菌 生理小种 鉴定 

分 类 号：S435.131[农业科学—农业昆虫与害虫防治]