Abstract:

Eight chromosome segment substitution lines (CSSL) of Gossypium hirsutum source of the same background were tested for resistance to Verticillium wilt, which contrasted with high resistance to Verticillium wilt Xin Lu-zao 33 and susceptibility to Verticillium wilt Xin Lu-zhong 36 in Xinjiang Province. Sprinkle the strain suspention on root in non-bottom plastic film bottle and natural disease garden methods were selected to test the resistance. The rate of disease, disease index, relative resistant index and countermeasure effectiveness were adopted in the original text. The discovery showed that infection type of relative resistance index was consistent with disease index. The infection type of countermeasure effectiveness was lower than the infection type of relative resistance index. The qualification standard of flower and boll stage was lower than that of seedling. The results demonstrated that CSSL of code NO.CSSL155 could be selected as resistant variety to Verticillium wilt; correlativity analysis on the appraisal that seedling stage appraisal index and flower bell expected that we could use the seedling stage appraisal to forecast fully grown plant scheduled time, the disease-resistant breeding provides the theory basis to routine; at the same time this testing provided the theoretical basis of conventional breeding for Verticillium wilt disease resistance.