A high efficiency gene disruption strategy using a positive-negative split selection marker and electroporation for Fusarium oxysporum
文献类型: 外文期刊
第一作者: Liang, Liqin
作者: Liang, Liqin;Ling, Jian;Luo, Zhongqin;Xie, Bingyan;Liang, Liqin;Li, Jianqiang;Liang, Liqin;Cheng, Lin;Bai, Miao
作者机构:
关键词: Split-marker;Recombination;Homologous Disruption;Electroporation;Fusarium oxysporum
期刊名称:MICROBIOLOGICAL RESEARCH ( 影响因子:5.415; 五年影响因子:6.038 )
ISSN:
年卷期:
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收录情况: SCI
摘要: The Fusarium oxysporum species complex consists of fungal pathogens that cause serial vascular wilt disease on more than 100 cultivated species throughout the world. Gene function analysis is rapidly becoming more and more important as the whole-genome sequences of various F. oxysporum strains are being completed. Gene-disruption techniques are a common molecular tool for studying gene function, yet are often a limiting step in gene function identification. In this study we have developed a F. oxysporum high-efficiency gene-disruption strategy based on split-marker homologous recombination cassettes with dual selection and electroporation transformation. The method was efficiently used to delete three RNA-dependent RNA polymerase (RdRP) genes. The gene-disruption cassettes of three genes can be constructed simultaneously within a short time using this technique. The optimal condition for electroporation is 10 mu F capacitance, 300 Omega resistance, 4kV/cm field strength, with 1 mu g of DNA (gene-disruption cassettes). Under these optimal conditions, we were able to obtain 95 transformants per mu g DNA. And after positive-negative selection, the transformants were efficiently screened by PCR, screening efficiency averaged 85%: 90% (RdRP(1)), 85% (RdRP(2)) and 77% (RdRP(3)). This gene-disruption strategy should pave the way for high throughout genetic analysis in F. oxysporum
分类号: Q
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