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南方根结线虫Col基因分子克隆及其VIGS效应分析

, PP. 333-338

Keywords: 根结线虫,RNA干扰,角质层胶原蛋白,病毒介导的基因沉默

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Abstract:

为了明确线虫角质层胶原蛋白基因(Col)与根结线虫病害的关系,利用从线虫基因组中预测的Col设计特异引物,克隆了南方根结线虫Meloidogyneincognitacol基因MiCol。该基因完整编码区长903bp,编码300个氨基酸。克隆的MiCol与预测的MiCol基因序列一致性高达99.67%,氨基酸序列一致性高达100%。利用病毒介导的基因沉默技术,将其导入番茄植株并接种南方根结线虫,60d后,沉默载体pTV-MiColi处理番茄植株的根结数比空载体对照及清水对照分别减少49.4%和49.2%,表明MiCol基因沉默显著降低了南方根结线虫的侵染数量。

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