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来自我国12个省84个县(市)的棉花黄萎病菌,在PDA培养基上存在5种不同的培养类型,其中,产生微菌核较多的B型菌株为优势类群,占72.9%。长江流域的菌株培养性状变异最大,新疆棉区的变异最小。致病力测定结果和ISSR指纹图谱均将167个单孢菌株划分为强、弱、中3个致病力类型,供试菌株的ISSR指纹图谱与菌株的致病力存在明显的相关性。中等致病力类型菌株在我国占主导地位;强致病力类型的菌株主要分布在河北、河南、湖北等省;弱致病力类型菌株主要分布在新疆和江苏。
Verticillium dahliae from 84 counties (cities) in 12 provinces of China had 5 different culture types on PDA medium. Among them, B type strains with more bacteria nuclei were the dominant groups, accounting for 72.9%. The variation of bacterial culture traits in the Yangtze River Basin was the largest, while the variation in Xinjiang cotton area was the smallest. The results of pathogenicity test and ISSR fingerprinting all divided 167 monosomyces isolates into three types of virulence, weakness and moderate virulence. ISSR fingerprinting of tested strains was significantly correlated with the pathogenicity of the isolates. Middle pathogenicity strains predominate in our country; strong virulence strains are mainly distributed in Hebei, Henan and Hubei provinces; weak pathogenicity strains are mainly distributed in Xinjiang and Jiangsu.