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甘肃中部及周边地区小麦条锈菌种群的遗传结构分析

, PP. 334-339

Keywords: 遗传多样性,小麦条锈病,SSR标记

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Abstract:

为明确甘肃中部与周边地区小麦条锈菌种群的遗传结构及关系,利用SSR分子标记技术对采自甘肃、陕南、青海及新疆等7个地区共369份小麦条锈病菌标样的群体遗传结构进行了分析.结果表明,小麦条锈菌群体Nei's基因多样性指数为0.39、Shannon信息指数为0.57,各地区条锈菌群体遗传多样性较为丰富,且在不同地区之间存在明显差异,7个条锈菌群体中以天水种群的遗传多样性相对较高,其Nei's基因多样性指数为0.42、Shannon信息指数为0.61.该地区小麦条锈菌群体间和群体内都存在着一定的遗传分化,群体间遗传变异占总变异的2.24%,群体内遗传变异占总变异的97.76%.表明甘肃中部及周边地区小麦条锈菌群体存在一定的遗传分化,但遗传变异主要发生在群体内部;甘肃中部、陇南及陕南3地的小麦条锈菌种群遗传相似度较高,菌源交流密切.

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