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同域分布垂穗披碱草和达乌力披碱草遗传多样性和遗传结构分析
路兴旺; 刘博; 陶小燕; 窦全文
2020
Source Publication广西植物
Pages10
Abstract披碱草属(Elymus L.)是禾本科(Poaceae)小麦族(Triticeae)中的一个多年生属,该属在青藏高原地区有广泛分布,多数物种是草原和草甸的组成成分,许多种类为品质优良的牧草。垂穗披碱草(E. nutans)和达乌力披碱草(E. dahuricus)同为禾本科小麦族披碱草属异源六倍体物种,染色体组组成皆为StYH。为探究垂穗披碱草遗传多样性形成的内在机制,本研究利用微卫星(SSR)分子标记,对采自青藏高原地区同域分布的垂穗披碱草和达乌力披碱草两个居群共58个个体进行遗传多样性和遗传结构分析,结果表明:8对引物在垂穗披碱草和达乌力披碱草扩增条带分别为163条和124条,多态性位点百分率(PPB)分别为89.71%和76.07%,多态性信息含量(PIC)分别介于0.583~0.929和0.524~0.830之间。垂穗披碱草遗传多样性(He=0.69,I=1.34,P_(p)=100%)高于达乌力披碱草(He=0.53,I=0.80,P_(p)=93.75%),同域分布的垂穗披碱草和达乌力披碱草居群,垂穗披碱草呈现出更高的遗传多样性。AMOVA分子变异显示两个物种居群内遗传变异分别80.92%和63.62%,而居群间遗传分化水平较低。遗传结构分析揭示两个物种间有基因流存在。综合分析结果认为该地区种间杂交基因渗透引起的种内遗传分化在这两个物种多样性形成中可能起着重要的作用。
Keyword垂穗披碱草 达乌力披碱草 遗传多样性 遗传结构 SSR标记
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/60612
Collection中国科学院西北高原生物研究所
Recommended Citation
GB/T 7714
路兴旺,刘博,陶小燕,等. 同域分布垂穗披碱草和达乌力披碱草遗传多样性和遗传结构分析[J]. 广西植物,2020:10.
APA 路兴旺,刘博,陶小燕,&窦全文.(2020).同域分布垂穗披碱草和达乌力披碱草遗传多样性和遗传结构分析.广西植物,10.
MLA 路兴旺,et al."同域分布垂穗披碱草和达乌力披碱草遗传多样性和遗传结构分析".广西植物 (2020):10.
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