蕙兰SSR引物开发及渝贵川地区兰属遗传多样性研究
作者:
作者单位:

西南大学园艺园林学院/重庆市花卉工程技术中心/南方山地园艺学教育部重点实验室

作者简介:

通讯作者:

中图分类号:

基金项目:

中央高校项目( XDJK2014C178, SWU115019, XDJK2020B059)


Development of SSR Primers in Cymbidium faberi and Study on Genetic Diversity of Cymbidium in Chongqing-Guizhou-Sichuan Region
Author:
Affiliation:

College of Horticulture and Landscape Architecture, Southwest University/ Chongqing Engineering Research Center for Floriculture/ Ministry of Education Key Laboratory of Horticultural Science for Southern Mountainous Regions

Fund Project:

Fundamental Research Funds for the Central Universities (XDJK2014C178, SWU115019, XDJK2020B059)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    采用磁珠富集法对野生蕙兰 DNA 进行 SSR 引物开发, 并以开发出的多态性引物为研究工具, 选取来自渝、 贵、 川三省的 9 个野生兰属居群为研究对象, 探讨遗传多样性分布与其地理位置的关系。 结果显示: 8 对 SSR 引物共扩增出 53 个等位基因, 平均每个位点的等位基因为 6.625 个, 平均多态性位点百分率(PPF) 为 98.6%。 兰属植株个体间存在交配不平衡现象,Nei’s 多样性指数 H 的范围为 0.3158-0.8661, Shannon 信息多样性指数(I) 的变化范围为 0.8833~1.3557。 重庆黔江野生兰属居群的遗传多样性最高, 79.97%的遗传分化存在于居群内, 20.03%的遗传分化存在于居群间, 居群内的变异高于居群间, 基因流Nm<1, 遗传漂变在兰属的遗传分化中起一定的作用, 通过比较居群间遗传聚类结果与兰属植株采集地理位置的关系, 发现野生兰花居群的划分在分子遗传学水平受其地理因素的影响较大。

    Abstract:

    SSR primers were developed by using the magnetic bead enrichment method in Cymbidium faberi, and the polymorphic primers were used as research tools to explore the relationship between the genetic diversity and the geographical distribution for nine selected wild populations of Cymbidium from the Chongqing-Guizhou-Sichuan Region in China. The results showed that a total of 53 alleles were amplified by 8 pairs of SSR primers. The average number of alleles per locus was 6.625, and the average percentage of polymorphic fragments (PPF) was 98.6%. Mating imbalance between individual plants of Cymbidium was detected. The range of Nei’s diversity index (H) was 0.3158-0.8661, and the range of Shannon information diversity index (I) was 0.8833-1.3557. The genetic diversity of the Qianjiang populations in Chongqing was the highest, with 79.97% of the genetic differentiation within the population,and 20.03% of the genetic differentiation between the populations, the variation within the population being higher than that between the local populations. The gene flow of Nm<1 indicated that the genetic drift played some role in the genetic differentiation of the Cymbidium. By comparing the relationship between genetic clustering results among the populations and the geographic locations of the Cymbidium plants, it was found that the division of wild Cymbidium populations is greatly affected by geographic factors at the molecular genetic level.

    参考文献
    相似文献
    引证文献
引用本文

寇帅,李政,李先源,等.蕙兰SSR引物开发及渝贵川地区兰属遗传多样性研究[J].植物遗传资源学报,2021,22(2):338-348.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-08-12
  • 最后修改日期:2020-09-12
  • 录用日期:2020-09-21
  • 在线发布日期: 2021-03-09
  • 出版日期:
文章二维码
您是第位访问者
ICP:京ICP备09069690号-23
京ICP备09069690号-23
植物遗传资源学报 ® 2024 版权所有
技术支持:北京勤云科技发展有限公司