数字农科院2.0

The disease quantification analysis of cotton Verticillium wilt using the two methods of disease index and fungal biomass present high consistency

文献类型： 外文期刊

作者： Zhu, He;Li, Yue;Ji, Xiao-bin;Zhang, Dan -dan;Chen, Jie-yin;Dai, Xiao-feng;Wang, Zi-sheng;Wang, Dan

作者机构：

关键词： Verticillium dahliae;disease grade classification;qPCR;correlation coefficient

期刊名称： PLANT PROTECTION SCIENCE

ISSN： 1212-2580

年卷期： 2024 年

页码：

收录情况： SCIE（2024版）

摘要： Verticillium dahliae is a broad host-range pathogen that causes vascular wilt in plants. The Verticillium wilt disease severity assay on plants caused by V. dahliae mainly includes two methods, one is a plant disease grade classification based on disease severity statistics [namely the disease index (DI)], and the other is the V. dahliae biomass quantification in plants (namely the fungal biomass). In this study, the relationships of pathogenicity with the DI, pathogenicity with the biomass, and the correlation analysis of the DI and relative fungal biomass were analysed. The results showed that pathogenicity assessment of V. dahliae strains using the DI method was able to give an intuitive reflection of the pathogenic ability for defoliating and non-defoliating strains; moreover, the method of quantitative PCR for fungal biomass also had high repeatability and stability. As a whole, the correlation coefficient between the DI and fungal biomass values of 28 strains was 0.728, indicating that the two data sets were highly correlated; however, the correlation coefficients of the defoliating strains and non-defoliating strains were only 0.5384 and 0.4547, respectively. In conclusion, the correlation coefficient between the DI and the fungal biomass presented high consistency, which could provide some meaningful exploration for the more accurate pathogenicity identification of V. dahliae.

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