木豆种质资源AFLP标记遗传多样性分析

被引:19
作者
闫龙
关建平
宗绪晓
机构
[1] 中国农业科学院作物科学研究所
关键词
木豆; AFLP; 聚类分析; 遗传多样性; 起源中心;
D O I
暂无
中图分类号
S529 [其他];
学科分类号
0901 ;
摘要
利用AFLP分子标记技术,以木豆野生种(Cajanus scarabaeiodes)为对照,对来自印度、中国、非洲和美洲的139份栽培木豆(Cajanus cajan)种质遗传多样性进行研究。17对引物共扩增出502条清晰可辨的带,其中多态性带494条。遗传相似性系数UPGMA聚类图,揭示木豆种内存在足够的遗传多样性,可用于种质资源的准确鉴别与分类。借助遗传距离的ME进化树又将参试种质分成8个组群。分析结果表明,印度地方资源遗传多样性广泛,育成品种遗传基础广阔;非洲、美洲资源遗传多样性较丰富,且与印度资源的亲缘关系较密切。中国地方资源遗传多样性独特,且与印度、非洲、美洲栽培木豆资源亲缘关系不明显。研究结果基本支持印度木豆起源和多样性中心、非洲次生多样性中心的观点,并提出中国次生起源中心和遗传多样性中心假说。研究还发现,木豆核质互作雄性不育系(A)和保持系(B)间存在独特的AFLP谱带差异,可能有助于分子标记辅助的木豆杂种优势利用和杂交种培育。
引用
收藏
页码:790 / 798
页数:9
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