ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(6)£º480-487
Pattern Analysis of the Interaction between Verticillium dahliae Strains and Cotton Varieties Abstract£ºIn order to study the interaction pattern of strains and cotton varieties, the disease indices of twenty-three different resistant or susceptible varieties inoculating 18 isolates of Verticillium dahliae were analyzed by biplot method based on cluster analysis. The results showed that 23 cotton cultivars were grouped into six clusters, and 18 Verticillium dahliae strains were clustered into five groups. With the highest resistance to all strain groups, variety cluster G1 which was consisted of two lines (5031 and 50312) could be used as good resistant resource in breeding of Verticillium wilt resistance. There is a high host-pathogen interaction between strain group S4 and variety group G5. As dominant strains and with the highest pathogenicity, S4 consisting of 4 Verticillium dahliae strains among which VD25 came from Chengan of Hebei Province and the rest, named as XS4, XS6, and XS7 all from Changshu of Jiangsu Province, should be very important in identifying and breeding for Verticillium wilt resistance. Strain groups S2 and S3, which highly interacted with 3 variety groups (accounting for 56% of the tested material), might be the potential dominant strains. With average resistance to all strains, variety group G2 was the excellent host for Verticillium dahliae.
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