Dispersal routes of Cercospora zeina causing maize gray leaf spot in China  

作　　者：DUAN Can-xing ZHAO Li-ping WANG Jie LIU Qing-kui YANG Zhi-huan WANG Xiao-ming 

机构地区：[1]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement,Beijing 100081,P.R.China [2]Department of Biological Center,Harbin Academy of Agricultural Sciences,Harbin 150028,P.R.China

出　　处：《Journal of Integrative Agriculture》2022年第10期2943-2956,共14页农业科学学报（英文版）

基　　金：supported by the China Agriculture Research System from MOAR and MOF(CARS-02);the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences(CAAS-ASTIP-2017-ICS)。

摘　　要：The gray leaf spot caused by Cercospora zeina has become a serious disease in maize in China.The isolates of C.zeina from Yunnan,Sichuan,Guizhou,Hubei,Chongqing,Gansu,and Shaanxi were collected.From those,127 samples were used for genetic diversity analysis based on inter-simple sequence repeat(ISSR)and 108 samples were used for multi-gene sequence analysis based on five gene fragments.The results indicated that populations of C.zeina were differentiated with a relatively high genetic level and were classified into two major groups and seven subgroups.The intra-population genetic differentiation of C.zeina is the leading cause of population variation in China,and interpopulation genetic similarity is closely related to the colonization time and spread direction.The multi-gene sequence analysis of C.zeina isolates demonstrated that there were nine haplotypes.Genetic diversity and multi-gene sequence revealed that Yunnan population of C.zeina,the earliest colonizing in China,had the highest genetic and haplotype diversity and had experienced an expansion event.With the influence of the southwest monsoon in the Indian Ocean,C.zeina from Yunnan gradually moved to Sichuan,Guizhou,Shaanxi,Gansu,and Chongqing.Meanwhile,C.zeina was transferred directly from the Yunnan into the Hubei Province via seed and then came into Shaanxi,Henan,and Chongqing along with the wind from Hubei.

关 键 词：MAIZE gray leaf spot Cercospora zeina POPULATION disperse routes 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]