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不结球白菜品种基于SSR标记的群体结构分析

DOI: 10.3969/j.issn.1000-7091.2013.03.012, PP. 62-66

Keywords: 不结球白菜,SSR,群体结构,遗传多样性

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Abstract:

为了研究不结球白菜内部的群体结构,从全国搜集了78份广泛种植的蔬菜用不结球白菜品种,使用SSR标记对其进行多态性分析,并利用Structure2.1软件统计分析标记数据划分群体结构。结果表明,初筛出的21对多态性SSR标记覆盖了白菜10个连锁群,在78份材料中扩增共产生了56个等位基因变异,平均每个SSR标记产生的等位基因数目为2.7个。Structure分析表明,所选的不结球白菜可分为4个亚类群,S1和S2亚类群主要集中了来自于南北方各省份的49份普通白菜,苗用大白菜主要分布在S3和S4亚类群,乌塌菜主要分布在S1和S4亚类群,菜心的遗传背景比较复杂;材料的类群划分与地理来源的关系在S2亚类群表现的较为明显。结果表明,不结球白菜内部存在着明显的群体结构,为合理利用现有的种质资源指导育种和进行新基因的挖掘奠定了基础。

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