【摘 要】
：
水稻是我国的重要粮食作物，我国的水稻种植区域广泛，其中东北稻区和华中稻区是我国水稻的重要产区，两稻区冬季温度差异显著。分生孢子是稻瘟病菌越冬的方式之一，为了了解各地稻瘟病菌群体是否各自进化到适应各地的环境温度，对东北和华中稻区的73个稻瘟病菌的分生孢子的低温耐受性进行研究。研究结果表明，不同天数(0、5、10、15、20)的低温(-21℃)处理后，东北稻区与华中稻区的稻瘟病菌分生孢子的萌发率差异显
【机 构】
：
中国农业大学,农学与生物技术学院,北京 100193
【出 处】
：
中国植物病理学会2015年学术年会
论文部分内容阅读
水稻是我国的重要粮食作物，我国的水稻种植区域广泛，其中东北稻区和华中稻区是我国水稻的重要产区，两稻区冬季温度差异显著。分生孢子是稻瘟病菌越冬的方式之一，为了了解各地稻瘟病菌群体是否各自进化到适应各地的环境温度，对东北和华中稻区的73个稻瘟病菌的分生孢子的低温耐受性进行研究。研究结果表明，不同天数(0、5、10、15、20)的低温(-21℃)处理后，东北稻区与华中稻区的稻瘟病菌分生孢子的萌发率差异显著，东北稻区的分生孢子对低温的耐受能力较强。说明了各地稻瘟病菌群体因冬季低温的差异已经存在显著分化，地区间的地理隔离可能在稻瘟病流行起到重要作用，远距离菌源交流对群体遗传结构的影响不大。
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