马铃薯早疫病菌Alternaria alternata交配型异型体MAT1-1和MAT1-2不同的致病力研究  

Significant difference in pathogenicity of MAT1-1 and MAT1-2 isolates in potato pathogen Alternaria alternata

作　　者：蒙静雯 谢业焜 沈林林[1] 李冬亮[1] 祝雯[1] 詹家绥[1] 

机构地区：[1]福建农林大学植物病毒研究所,福建福州350002 [2]湖北医药学院,湖北十堰442000

出　　处：《广东农业科学》2016年第2期89-93,共5页Guangdong Agricultural Sciences

基　　金：国家现代农业(马铃薯)产业技术体系(CARS-10)

摘　　要：从全国7个省份(黑龙江、内蒙古、山东、河南、湖北、福建和云南)收集Alternaria alternata,采用SSR中性分子标记和交配型特异性引物测定菌株并选出234株不同基因型的菌株,再用离体叶片法测量菌株的致病力(病斑面积)。结果表明,7个群体中来自南方群体比来自北方群体致病力强,其中福建群体比山东群体的致病力高98.29%。MAT1-1交配型菌株和MAT1-2交配型菌株之间致病力存在显著差异,MAT1-2交配型菌株致病力比MAT1-1交配型菌株平均高15.34%。Alternaria alternata collected from seven provinces （Heilongjiang, Inner Mongolia, Shandong, Henan, Hubei, Fujian and Yunnan ） in China were molecularly characterized using neutral SSR markers and mating type- specific primers. Among them, 234 distinct genotypes were selected for pathogenicity analysis by detached leaf assay. The result indicated that, on average, the pathogen from South displayed higher pathogenicity than that from North. For example, the pathogenicity of pathogen from Fujian was 98.29% higher than that from Shandong. The result also showed a significant difference in pathogenicity between MAT1-1 and MAT1-2 isolates. On average, MAT1-2 isolate displayed 15.34% higher pathogenicity than MATI-1 isolate.

关 键 词：Alternaria ALTERNATA 马铃薯早疫病 致病力 交配型 离体鉴定 

分 类 号：S432.1[农业科学—植物病理学]