Pathogenic variation and molecular characterization of Fusarium species isolated from wilted sesame in China

文献类型： 外文期刊

第一作者： Li Dong-hua

作者： Li Dong-hua;Wang Lin-hai;Zhang Yan-xin;Lv Hai-xia;Qi Xiao-qiong;Wei Wen-liang;Zhang Xiu-rong

作者机构：

关键词： Sesamum indicum L.;Fusarium wilt;Fusarium oxysporum;amplified fragment length polymorphism (AFLP);pathogenicity

期刊名称：AFRICAN JOURNAL OF MICROBIOLOGY RESEARCH （ 影响因子：0.539； 五年影响因子：0.564 ）

ISSN： 1996-0808

年卷期： 2012 年 6 卷 1 期

页码：

收录情况： SCI

摘要： Twenty-five isolates of Fusarium species were obtained from wilted sesame (Sesamum indicum L.) grown on 25 farms from 22 regions of China. These were identified as Fusarium oxysporum (20 isolates) and other Fusarium spp. (5 isolates) by polymerase chain reaction and sequencing of the internal transcribed spacer region of fungal ribosomal RNA genes. Molecular characterization of Fusarium isolates was performed using amplified fragment length polymorphism (AFLP) analysis of genomic DNA. The 25 isolates were grouped into two types (type I for F. oxysporum and type II for other Fusarium spp.). The pathogenicity of the 25 isolates was tested on sesame cultivar 3433. And the Fusarium isolates varied in the degree of disease severity they caused; with five F. oxysporum isolates (02, 08, 11, 20, and 25) were having more aggressive virulence to sesame than the other isolates. The results of AFLP analysis were combined with the pathogenicity data to conduct correlation analysis, and it was found that type I could be divided into 2 subtypes: type IA, with middle to weak pathogenicity, and type IB, with strong pathogenicity. These findings are an important foundation for sesame resistance breeding.

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