为探讨河南商丘地区棉花黄萎病菌的致病型群体变异,对该地区棉花上分离的8株单孢菌株的菌落形态、显微结构、致病力、ITS序列、系统进化及菌体蛋白等方面进行了研究。结果表明:这些菌株均属于棉花黄萎病菌Verticilliumdahliae;系统进化树显示8株菌株并没有聚在同一进化枝上;8株黄萎菌菌株存在致病力差异,SQ4菌株致病力最强,属于落叶型,而其它致病力较弱的7个菌株属于非落叶型;不同致病力的菌株间蛋白谱带存在差异。 In order to explore the pathogenic population variation of Verticillium dahliae in Shangqiu area in Henan Province, the colony morphology, microstructure, virulence, ITS sequence, phylogenetic and microbial proteins Aspects of research. The results showed that all of these strains belonged to Verticillium dahliae. The phylogenetic tree showed that 8 strains did not accumulate on the same clade. 8 strains of Verticillium dahliae showed pathogenicity differences, and SQ4 strains were the most virulent While the other 7 strains with weaker pathogenicity belonged to non-deciduous type. There were differences in the protein bands between different virulence strains.