广西水稻白叶枯病菌致病型的初步鉴定  

Preliminary identification of pathotype of Xanthomonas oryzae pv. oryzae in Guangxi

作　　者：陈小林[1,2] 颜群[1,2] 高利军[1,2] 韦善富[1,2] 李道远[3] 高汉亮[1,2] 

机构地区：[1]广西农业科学院植物保护研究所,南宁530007 [2]广西作物病虫害生物学重点实验室,南宁530007 [3]广西农业科学院水稻研究所,南宁530007

出　　处：《南方农业学报》2015年第2期236-240,共5页Journal of Southern Agriculture

基　　金：国家现代农业产业技术体系广西(水稻)创新团队项目(CARS-01);广西科学研究与技术开发计划项目(桂科重14121001-1-2);广西农业科学院基本科研业务专项项目(桂农科2014YD09;桂农科2014YZ24);广西作物病虫害生物学重点实验室基金项目(13-051-47-ST-3)

摘　　要：【目的】明确广西水稻白叶枯病菌致病型的分布和分化,为生产上该病害的综合防控提供理论依据。【方法】采用水稻白叶枯病菌中国鉴别寄主(金刚30、特特普、南粳15、爪哇14、IR26)对2013年从广西南宁、东兴、防城港、钦州、岑溪等地水稻病区分离得到的29株水稻白叶枯病菌进行致病型初步鉴定,同时采用部分近等基因系对5株南宁分离菌株致病性进行进一步分析。【结果】29株菌株在5个鉴别寄主上均出现感病反应,均为SSSSS模式,为强致病菌;5株南宁分离菌株能使目前抗谱最广的水稻材料CBB23感病。【结论】广西水稻白叶枯病菌致病力出现极大分化,需加强对该病害的防控及水稻抗病材料的筛选利用工作。【 Objective 】 The pathotype distribution and differentiation of Xanthomonas oryzae pv. oryzae（ Xoo） in Guangxi were ascertained to provide theoretical references for integrated control of rice bacterial blight. 【Method】29 isolates from rice production regions of Nanning, Dongxing, Fangcheng, Qinzhou and Cenxi City in 2013 were preliminarily evaluated on a set of Chinese differential varieties（Jinggang 30, Tetep, Nanjing15, Java14 and IR26） of Xoo and the pathogenicity of 5 isolates from Nanning was further analyzed using some near-isogenic lines. 【Result】Disease reaction patterns of all 29 isolates on 5 hosts were SSSSS（all susceptible） and the pathogenicity was high. Furthermore, the isolates collected from Nanning could cause rice near-isogenic line CBB23 with broad spectrum highly susceptible.【Conclusion】Great differentiation is shown in pathogenicity of Xanthomonas oryzae pv. oryzae（Xoo） in Guangxi. Hence,integrated control of rice bacterial blight and selection of resistant rice materials should be strengthened in the future.

关 键 词：水稻白叶枯病菌 致病型 致病性 广西 

分 类 号：S435.111.47[农业科学—农业昆虫与害虫防治]