棉花学报2012，Vol.24Issue(2)：147-152,6.
新疆南部棉区黄萎病菌种群致病性分化及变异
Pathogenicity Differentiation and Variability of Verticillium dahliae Kleb.from Cotton in Southern Xinjiang
摘要
Abstract
To explore the pathogenicity differentiation and variability of a Verticillium dahliae population from cotton in southern Xinjiang, 36 representative strains were collected and the pathogenicity types determined on the basis of differential host tests and PCR assays. The results of differential host tests inoculations showed that strong, moderate, and low pathogenicity strains occupied 75.0%, 11.1%, and 13.9% of total examined strains, respectively, which was different from a 2004 investigation showing 14.3%, 45.7%, and 40.0%, respectively. Results of a special PCR primer (ND1/ND2 and D1/D2) assay showed that the defoliating and non-defoliating strains occupied 33.3% and 66.7%, of total examined strains, respectively. Generally, the severity of cotton infection by the defoliating strains was higher than in non-defoliating strains, and the corresponding average index was 43.8 and 31.8, respectively. Defoliating symptoms appeared in cotton infected by defoliating and non-defoliating strains. Thus, the defoliation is not only related with the pathogenicity and pathotype of Verticillium dahliae, but also with the resistance of cotton cultivars.关键词
黄萎病菌/致病性分化/致病类型/落叶症状/新疆南疆Key words
Verticillium dahliae/ pathogenicity differentiation/ pathogenicity types/ symptoms of defoliation/ southern Xinjiang分类
农业科技引用本文复制引用
韩宏伟,任毓忠,刘培源,张莉,李春,李国英..新疆南部棉区黄萎病菌种群致病性分化及变异[J].棉花学报,2012,24(2):147-152,6.基金项目
科技部基础性工作专项“棉花病害种类、生理小种分布、为害调查及抗性快速鉴定”(SB2007FY027) （SB2007FY027）
