Evaluation of Genetic Diversity of Highly Virulent Strains of Xanthomonas campestris pv. malvacearum by rep-PCR Fingerprinting

文献类型： 外文期刊

第一作者： Zhai, Jinling

作者： Zhai, Jinling;Luo, Yuehua;Huang, Xi;Zheng, Daojun

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关键词： BOX;ERIC;dendrogram;virulence-correlated

期刊名称：JOURNAL OF PHYTOPATHOLOGY （ 影响因子：1.789； 五年影响因子：1.574 ）

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收录情况： SCI

摘要： AbstractHighly virulent strains (HVSs) of Xanthomonas campestris pv. malvacearum (Xcm) infect all commercial cultivars of cotton including the resistant cultivar '101-102B'. Previous reports showed that different HVS isolates caused distinct symptoms on host. To evaluate the global genetic diversity of Xcm as well as HVS, 38 strains including 12 HVSs isolated from different countries were analysed by repetitive sequence (rep)-based PCR with ERIC and BOX primer sets. rep-PCR showed abundant polymorphism of fingerprinting. The strains were separated into different genotypic groups at a similarity coefficient of 0.76 using a UPGMA analysis. Interestingly, the strains with low or moderate virulence were clustered in one genogroup, whereas all HVSs isolated in Africa were segregated in another genogroup. These results suggest that the virulence of Xcm was highly related to genotype and-or geoclimatic origin of the strains. Additionally, the HVSs could be divided into two subgroups at a similarity coefficient of 0.80, indicating the genetic diversity of HVSs.

分类号： Q945

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