玉米抗大斑病菌单基因系的建立及其在Exserohilum turcicum生理小种鉴定中的应用

利用美国A632,B37,B73,B68,C103,Va26等30个Ht单基因鉴别寄主, 按美国伊利诺伊大学的大田接种方案与鉴定方法, 建立了适合中国的监测玉米
大斑病菌生理小种鉴定的21个Ht单基因系. 从吉林省15个地区的不同玉米品种中采集玉米大斑病样本, 采用单孢分离获得了32个玉米大斑病菌菌株, 利用已建立的上述21个Ht单基因鉴别寄主, 通过美国的大田鉴定方案进行生理小种鉴定. 结果表明, 这32个菌株均为0号小种, 并未出现生理小种分化现象.

Corn Resistant Single Gene Lines to Exserohilum turcicum and Their Application to Identification of Physiological Races of E.turcicum

Thirty inbred lines such as A632,B37,B73,B68,C103 and Va26 from the inbred collection at the University of Illinois were used to determine physiological races of Exserohilum turcicum in the field.Twenty-one inbred lines from the inbred collection were selected to determine physiological differentiation of E.turcicum effectively in China.Thirty-two single conidial isolates of E.turcicum were collected throughout 15 farming areas of Jilin Province.All the 32 isolates were race zero.There was no physiological differentiation of the pathogen.