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中国农学通报 ›› 2016, Vol. 32 ›› Issue (3): 79-85.doi: 10.11924/j.issn.1000-6850.casb15080067

所属专题: 资源与环境

• 生物技术科学 • 上一篇    下一篇

利用SSR标记分析橡胶草种质资源的遗传多样性

杨玉双,张继川,张立群,甘霖,覃 碧,刘实忠   

  1. 中国热带农业科学院橡胶研究所,北京化工大学材料科学与工程学院,北京化工大学材料科学与工程学院,中国热带农业科学院橡胶研究所,中国热带农业科学院橡胶研究所,中国热带农业科学院广州试验站
  • 收稿日期:2015-08-12 修回日期:2015-12-24 接受日期:2015-10-23 出版日期:2016-01-29 发布日期:2016-01-29
  • 通讯作者: 刘实忠
  • 基金资助:
    中国热带农业科学院橡胶研究所基本科研业务费专项“新疆地区橡胶草野生种质与突变体材料的收集与鉴定”(1630022014027);中国热带农业科学院橡胶研究所基本科研业务费专项“重要产胶替代植物种质资源收集与鉴定”(1630022015005);横向科技项目(企业资助)“蒲公英橡胶草种质改良及综合应用技术的研究与开发”(H2012177)。

Genetic Diversity Analysis of Taraxacum kok-saghyz Rodin Germplasm by SSR Markers

张继川,张立群,甘霖,覃 碧 and 刘实忠   

  • Received:2015-08-12 Revised:2015-12-24 Accepted:2015-10-23 Online:2016-01-29 Published:2016-01-29

摘要: 为了解橡胶草种质的遗传背景和遗传多样性,为今后橡胶草育种提供理论依据。利用23对SSR引物对96份橡胶草材料进行遗传多样性分析。结果显示,23对SSR引物通过扩增得到71个等位变异,等位变异范围2-6个,平均等位基因数为3.09个。通过聚类分析,俄罗斯材料和美国材料与新疆7个居群材料被分为2大类群,类群I包含所有俄罗斯和美国材料以及5份新疆野生材料,类群II包含其余新疆7个居群的材料;俄罗斯和美国材料同属于亚群A,平均遗传相似度为0.88,说明它们存在紧密的亲缘关系;新疆7个居群的材料被分为5个亚群,显示丰富的遗传多样性,而且相互之间存在复杂的遗传关系。本研究结果证明了SSR标记能够有效地用于橡胶草的遗传多样性研究,为以后的橡胶草种质收集和遗传育种提供重要依据。

关键词: 玉米, 玉米, 突变体, 光合作用, 叶绿素荧光

Abstract: Taraxacum kok-saghyz Rodin is an important rubber producing crops emerging in recent years with high quality rubber in the root.In order to know the genetic background and diversity of Taraxacum kok-saghyz Rodin germplasm collected. 23 pairs of SSR markers were used to analysis the genetic diversity of 96 accessions of Taraxacum kok-saghyz Rodin germplasm. Using 23 pairs of SSR markers, 71 polymorphic SSR loci were detected, 2 to 6 alleles were detected by each pair of primer, with an average of 3.09. Based on UPGMA clustering results, 96 accessions were divided into 2 groups. Group I contained all the Russian and American accessions, and 5 Xinjiang wild accessions, Group II contained the rest of Xinjiang wild accessions from 7 populations. Russian and American accessions belonged to subgroup A, the average genetic similarity coefficient among them was 0.88, which suggested that close genetic relationship was exited among them. 7 Xinjiang populations were divided into 5 subgroups, which showed wide genetic polymorphisms and complex genetic relationships among them. The analysis results of genetic diversity proved that, SSR marker could be used for genetic diversity research effectively which will provide the theorectic and practic base for germplasm collection and breeding of Taraxacum kok-saghyz Rodin in the future.

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