云南水稻白叶枯病生理小种初析及鉴别品种的筛选  

Preliminary Analysis on Race of Xanthomonas oryzae pv. oryzae in Yunnan and Screening of Differential Varieties

作　　者：姬广海[1] 夏贤仁[1] 肖鲁婷 管旭芳[1] 

机构地区：[1]云南农业大学云南省植物病理重点实验室,云南昆明650201 [2]河南信阳市平板区农技站,河南信阳464100

出　　处：《云南农业大学学报》2004年第5期541-545,共5页Journal of Yunnan Agricultural University

基　　金：国家自然科学基金资助项目(30160052);国家863计划资助项目(2002AA24504)

摘　　要：从云南省10个地州40个县市的水稻白叶枯病标本中分离纯化得到115个水稻白叶枯病菌株。利用已知抗性基因的近等基因系,在孕穗期应用剪叶法接种明确其生理小种。并筛选出一套鉴别品种IRBB1,IRBB3,IRBB4,IRBB5,IRBB7,IRBB13,IRBB14,IRBB18,IRBB21.云南省的水稻白叶枯病菌小种组成复杂,有自身的特殊性。已鉴定出25个小种,暂定名为YN1～YN25.优势生理小种为YN1,YN13,YN21,其中YN13分布于楚雄、玉溪、红河、丽江等4个地区共8县(市),YN21分布于大理、红河等地区。云南的小种多样性分布可能与它的地理条件有关。One hundred and fifteen strains of Xanthomonas oryzae pv.oryzae (Xoo)on rice were collected from 40 counties in Yunnan Province. Based on virulence analysis using a set of near-isogenic lines,each harboring a single resistance gene,the uppermost fully open leaves were inoculated by clipping method. Nine rice near-isogenic lines were selected as a set of differential varieties for identifing Xoo pathotype(race) including IRBB1,IRBB3,IRBB4,IRBB5, IRBB7,IRBB13,IRBB14,IRBB18 and IRBB21. The strains were grouped into 25 races, designated YN1-N25 tentatively.Among them YN1,YN13 and YN21 were predominant. The race YN13 strains distributed in 8 counties of Chixiong,Yuxi,Honghe,Lijiang cities; The race YN21 strains distributed in Dali and Honghe prefecture and so on. The diversity and distribution of Xoo race in Yunnan were proably associated with the geographical conditions

关 键 词：水稻白叶枯病菌 鉴别品种 生理小种 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]