欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2021, Vol. 41 ›› Issue (3): 429-435.doi: 10.7525/j.issn.1673-5102.2021.03.013

• 研究报告 • 上一篇    下一篇

基于GBS简化基因组技术的宽杯杜鹃遗传多样性分析

张序1,2, 张秀姣1, 马永鹏3, 李正红1, 万友名1, 马宏1()   

  1. 1.中国林业科学研究院资源昆虫研究所,昆明 650233
    2.南京林业大学林学院,南京 210037
    3.中国科学院昆明植物研究所,云南省极小种群野生植物综合保护重点实验室,昆明 650201
  • 收稿日期:2020-03-17 出版日期:2021-05-20 发布日期:2021-03-24
  • 通讯作者: 马宏 E-mail:hortscience@163.com
  • 作者简介:张序(1994—),男,硕士研究生,从事杜鹃属植物保护生物学研究工作。
  • 基金资助:
    中国林科院基本科研业务费专项资金(CAFYBB2019ZB007);生态环境部生物多样性调查评估—杜鹃遗传多样性调查与保护成效评估项目(2019HJ2096001006);云南省“万人计划”青年拔尖人才计划项目(2019);“云南省技术创新人才”培养对象项目(2016HB007)

Genetic Diversity Assessment of Rhododendron sinofalconeri with Genotyping by Sequencing(GBS)

Xu ZHANG1,2, Xiu-Jiao ZHANG1, Yong-Peng MA3, Zheng-Hong LI1, You-Ming WAN1, Hong MA1()   

  1. 1.Research Institute of Resources Insects,Chinese Academy of Forestry,Kunming 650233
    2.College of Forestry,Nanjing Forestry University,Nanjing 210037
    3.Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201
  • Received:2020-03-17 Online:2021-05-20 Published:2021-03-24
  • Contact: Hong MA E-mail:hortscience@163.com
  • About author:ZHANG Xu(1994—),male,past graduate,major in conservation biology of Rhododendron plants.
  • Supported by:
    Fundamental Research Funds for the Central Non-profit Research Institution of the Chinese Academy of Forestry(CAFYBB 2019ZB007);Biodiversity survey and assessment project of Ministry of Ecology and Environment(2019HJ2096001006);Ten Thousand Talent Program of Yunnan Province(2019);Technology Innovation Talent Project of Yunnan Province(2016HB007)

摘要:

宽杯杜鹃花色纯黄且钟状花冠簇生于枝顶,具有较高的观赏价值。近年来受道路建设及盗挖盗伐等人为影响,其生境破碎化严重且种群规模日渐萎缩,对其开展保护生物学研究已迫在眉睫。本研究采用基因分型(genotyping-by-sequencing,GBS)技术对宽杯杜鹃老君山(LJS)与大黑山(DHS)两个残存种群进行单核苷酸多态性(single-nucleotide-polymorphism,SNP)位点挖掘与遗传多样性分析。结果表明,通过获得的103 133个高质量SNP位点分析发现两个种群在物种水平上具有较低的遗传多样性(Ne=1.3086,Ho=0.1878,He=0.1856),而种群间具有较高的遗传分化(Fst=0.1765),种群间基因流(Nm)=1.1674。聚类分析、主成分分析与种群遗传结构分析表明36个个体被聚为2个不同的遗传类群。本研究首次揭示了宽杯杜鹃较低的遗传多样性现状,有助于进一步了解其濒危机理和科学地制定宽杯杜鹃保护措施。

关键词: 宽杯杜鹃, GBS, SNP, 遗传结构, 回归引种

Abstract:

Rhododendron sinofalconeri has high ornamental value with its pure yellow flower and bell-shaped corollas clustered on the top of the branches. In recent years, due to the anthropogenic impact of road construction, illegal excavation and other human activities, its habitat was severely fragmented and its population was shrunk. Therefore, it was urgent to research on conservation biology of R.sinofalconeri. Single-nucleotide-polymorphism(SNP) site mining and genetic diversity analysis were performed on two surviving populations of Laojunshan(LJS) and Daheishan(DHS) using genotyping-by-sequencing(GBS) technology. As a consequence, analysis of the 103 133 high-quality SNPs revealed that the two populations had lower genetic diversity at the species level(Ne=1.308 6, Ho=0.187 8, and He=0.185 6), and higher genetic differentiation(Fst=0.176 5) at population level. The value of gene flow(Nm) between populations was 1.167 4. By cluster analysis, principal component analysis and population genetic structure analysis, 36 individuals were clustered into two different genetic groups. This study revealed the current situation of relatively low genetic diversity of R.sinofalconeri for the first time, which was helpful to further understand the endangered and scientific formulation of conservation measures.

Key words: Rhododendron sinofalconeri, GBS, SNP, Genetic structure, Reintroduction

中图分类号: