2014-2016年四川盆地小麦白粉病菌毒性分析  

Population Virulence of Blumeria graminis f. sp. tritici in Sichuan Basin during 2014-2016

作　　者：徐志[1,2] 王胜[3] 张重梅[1] 张英[4] 姬红丽 倪健英[1] 周益林[2] 彭云良[1] XU Zhi;WANG Sheng;ZHANG Zhongmei;ZHANG Ying;JI Hongli;NI Jianying;ZHOU Yilin;PENG Yunliang(Institute of Plant Protection,Sichuan Academy of Agricultural Sciences/Key Laboratory of Integrated Pest Management of Crops in Southwest China,Ministry of Agriculture,Chengdu,Sichuan 610066,China;Plant Protection Station,Sichuan Agricultural Bureau,Chengdu,Sichuan 610041,China;Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;Institute of Agricultural Sciences in Tibetan Autonomous Prefecture of Ganze,Kangding,Sichuan 626000,China)

机构地区：[1]四川省农业科学院植物保护研究所/农业部西南作物有害生物综合治理重点实验室,四川成都610066 [2]中国农业科学院植物保护研究所,北京100193 [3]四川省农业厅植物保护站,四川成都610041 [4]四川省甘孜藏族自治州农业科学研究所,四川康定626000

出　　处：《麦类作物学报》2019年第2期247-252,共6页Journal of Triticeae Crops

基　　金：国家重点研发计划项目(2018YFD0200508);国家公益性行业(农业)科研专项(201503127;201303016);四川省科技计划项目(2016NYZ0053);成都市国际科技合作项目(2016-GH02-00101-HZ);四川省财政创新能力提升工程专项(2016GYSH-012;2014CXSF-021);四川省农业科学院优秀论文基金项目(2016LWJJ-006)

摘　　要：为明确四川盆地小麦白粉病菌群体的毒性结构,利用26个抗白粉病单基因(Pm)鉴别品种(系),对2014-2016年分离自四川省盆地内不同地区的189个小麦白粉病菌株进行了毒性测定,获得183个毒性类型,分别对6～21个Pm基因具有毒性,其中97.27%的类型仅出现一次,盆地西部和盆地东部病菌群体共有毒性类型有3种。病菌群体对抗病基因 Pm21的毒力频率为0,对 Pm1c、 Pm12、 Pm16和 Pm24的毒力频率低于20%,而对 Pm1a、 Pm2、 Pm3b、 Pm3c、 Pm3e、 Pm3f、 Pm4a、 Pm4b、 Pm5a、 Pm6、 Pm7、 Pm8、 Pm19、 Pm30的毒力频率高于60%;病菌的基因多样性指数、信息指数和多态位点百分率分别是0.301 4、0.460 1和96.15%;盆地西部病菌群体的毒性多态性高于盆地东部群体。To investigate the virulence structure of Blumeria graminis f.sp.tritici (Bgt) in Sichuan Basin,189 Bgt isolates derived from single ascospore were isolated from different regions of the basin during 2014-2016 and inoculated onto 26 differential lines with known Pm genes. Totally 183 virulence types respectively virulent to 6-21 Pm genes were detected,of which,97.27% were unique and only three virulence types were shared by western and eastern parts of Sichuan Basin. None of the tested isolate was found to be virulent to Pm21 and less than 20% of the iaolates were proved to be virulent to Pm1c , Pm12 , Pm16 , Pm21 and Pm24 . The virulence frequencies to Pm1a , Pm2 , Pm3b , Pm3c , Pm3e , Pm3f , Pm4a , Pm4b , Pm5a , Pm6 , Pm7 , Pm8 , Pm19 and Pm30 were all higher than 60.0%. The Nei’s gene diversity,Shannon’s information index,and the rate of polymorphic loci of the fungal population from Sichuan Basin was respectively 0.301 4,0.460 1 and 96.15%. The higher indices of the fungal population from the western part of Sichuan Basin revealed its higher diversity of virulence than that from the eastern part of Sichuan Basin.

关 键 词：四川盆地 小麦白粉病菌 毒力频率 毒性类型 毒性多样性 

分 类 号：S512.1[农业科学—作物学] S435.12