寄主多样性对马铃薯晚疫病群体致病力的影响

来源 :中国植物病理学会2014年学术年会 | 被引量 : 0次 | 上传用户：robinhohome

【摘要】

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【作者】

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袁霄杨丽娜祝雯潘泽超隋启军詹家绥

【机构】

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福建省植物病毒学重点实验室,福建农林大学植物病毒研究所,福州350002 云南省农业科学院经济作物

【出处】

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中国植物病理学会2014年学术年会

【发表日期】

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2014年3期

【关键词】

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马铃薯晚疫病寄主多样性群体选择压力致病力

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　　马铃薯晚疫病是由致病疫霉菌(Phytophthora infestans)引起的一种毁灭性病害，在世界各主产区均有发生.抗性品种是控制马铃薯晚疫病最经济、有效和环保的方法，但由于致病疫霉的易变性可快速进化特点、品种抗病性容易损失，而抗性基因的时空分布是决定致病疫霉进化的关键因子.在本研究中，我们从具有不同群体遗传多样性的马铃薯寄主群体采集150株致病疫霉，分别接种在感病品种费乌瑞它(Favorita)的离体叶片上，研究不同寄主源的致病疫霉的致病能力.我们发现，寄主源群体遗传多样性与致病疫霉的致病力即对费乌瑞它造成的危害(发病率和发病严重度)呈显著逆相关，分别为r4 =0.98 (P=0.006)和r4=0.888 (P=0.020 7)，说明高马铃薯寄主的群体可以降低高致病力致病疫霉形成的风险.

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寄主多样性对马铃薯晚疫病群体致病力的影响

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