吉林省玉米灰斑病菌的致病性分化研究  

Pathogenic Differentiation of Corn Gray Leaf Spot Pathogen in Jilin Province

作　　者：贾娇[1] 苏前富[1] 任智惠[1] 孟玲敏[1] 张伟[1] 李红[1] 晋齐鸣[1] 

机构地区：[1]吉林省农业科学院/农业部东北作物有害生物综合治理重点实验室,吉林公主岭136100

出　　处：《玉米科学》2016年第5期142-146,共5页Journal of Maize Sciences

基　　金：国家玉米产业技术体系(CARS-02)

摘　　要：选用9个自交系材料作为玉米灰斑病致病性分化的鉴别寄主,对采自吉林省不同地区的14个菌株进行致病性分化研究。结果表明,不同菌株侵染寄主病斑表现不同的反应型,不同菌株间致病力存在差异。根据在鉴别寄主上的发病等级可将吉林省玉米灰斑病菌菌株分为5个致病类群,其中,Ⅰ为强致病类型,包括1号和8号菌株;Ⅱ、Ⅲ为中等致病类群,包括7、9、10、12、13、14号6个菌株;Ⅳ、Ⅴ为弱致病类群,包括2、3、4、5、6、11号菌株。玉米灰斑病菌存在明显的致病分化现象。Fourteen isolates of Cercospora zeay-maydis, mainly isolated from corn gray leaf spot in different geographic regions in Jilin province, which were characterized by 9 differential hosts. The results showed that the progressive levels of symptom were different after the different C. zeae-maydis infection. The type of host reaction has polymorphism. The aggressivity was different between every isolates. Fourteen isolates were classified into five pathogenicity groups by the different aggressivity.I was the highest virulence to host, Ⅱand Ⅲ were the middles,Ⅴand Ⅳwere the weakest. The results showed that the pathogenicity of corn gray leaf spot was differentiated obviously.

关 键 词：玉米 玉米灰斑病 致病性分化 自交系 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]