甘肃省马铃薯晚疫病菌生理小种鉴定  

Identification of physiological races on Phytophthora infestans isolated from potato in Gansu Province

作　　者：成兰芳[1] 张文解 李惠霞[1] 王生荣[1] 

机构地区：[1]甘肃农业大学草业学院植物病理系,甘肃兰州730070 [2]甘肃省植保植检站,甘肃兰州730000

出　　处：《甘肃农业大学学报》2011年第3期65-69,共5页Journal of Gansu Agricultural University

基　　金：甘肃省植保植检站专项项目;国家科技支撑计划项目(2006BAD21B05);国家公益性行业(农业)科研专项经费项目(200803024)

摘　　要：对2009年采自甘肃省17个地点的63个马铃薯晚疫病菌株进行生理小种类型的鉴定.结果表明:小种4.6.7.11的出现频率达28.57%,出现频率最高,分布最广,是2009年甘肃省马铃薯晚疫病菌株的优势小种.而小种1.3.4.5.6.7.8.10.11含有的毒力基因数目最多,单毒力基因的生理小种只有4号.从生理小种的毒力基因组成来看,毒力基因vir1、vir4、vir6、vir7出现频率较高,均达到所鉴定菌种的50%以上,没有发现vir2、vir9毒力基因.Sixty three physiological races of Phytophthora infestans isolated from 17 potato production areas in Gansu Province were identified in 2009.The results showed that race 4.6.7.11 had the most frequent and distribution,the frequency reached 28.57%.Race 1.3.4.5.6.7.8.10.11 had the most virulent genes.Race 4 only had a simple virulent gene.The virulent genes vir1,vir4,vir6 and vir7 occurred much frequently（over 50%） and distributed widely.The virulent genes vir2 and vir9 did not found in Gansu Province.

关 键 词：马铃薯晚疫病 生理小种 鉴定 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]