普通杏和西伯利亚杏野生居群遗传多样性与其地理分布关系研究
作者:
作者单位:

1.辽宁省果树科学研究所;2.法国国家农业科学院水果与病理生物研究所

作者简介:

通讯作者:

中图分类号:

基金项目:

国家重点研发计划(2019YFD1000600)


Studyon The Relationship Between Genetic Diversityand Geographical Distribution of Wild Common Apricotsand Siberian Apricots
Author:
Affiliation:

Fund Project:

NationalKeyResearch&DevelopmentProgramofChina(2019YFD1000600)

  • 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:

    地理距离可能有利于陆地植物种群的遗传分化,了解地理因素如何影响基因流和居群遗传结构,对于遗传多样性保护至关重要。本研究以桃李属(Prunus)两个自然分布的种,即欧亚大陆的西伯利亚杏(PrunussibiricaL.)和中亚地区的普通杏(PrunusarmeniacaL.)共计 16 个野生居群为材料。本研究筛选多态性较好的 18 个微卫星 DNA 标记进行基因分型,应用贝叶斯模型分析其遗传多样性和居群遗传结构。本研究发现(1)起源于我国华北和东北地区的西伯利亚杏野生居群的遗传变异 和遗传多样性较中亚普通杏野生居群丰富,两个杏野生居群的遗传结构诠释了各自不同的最佳遗传群簇(K);(2)我国西伯利亚杏居群的遗传群簇分布具有地理差异特征,处于西北地区的居群呈现孤立结构,可能是与复杂的生态环境和地理上栖息自西向东的分布广泛有关;中亚地区野生普通杏居群的遗传结构呈高度杂合,可能由最近发生在有限地理分布区域中居群间的基因流引起;(3)地理隔离(IBD)解析了遗传分化与地理梯度之间相关关系,表明我国西伯利亚杏野生居群的地理距离与遗传距离之间存在显着的相关性,而在中亚的普通杏野生居群中则不同。综上,本研究指出与生态地理模式相关的遗传结构可能会影响杏属植物的遗传分化和遗传多样性,但对遗传分化和多样性的影响程度在不同的杏种居群中有所不同。基于此,进一步讨论了开展遗传多样性保护的可能策略和意义。

    Abstract:

    The geographic distance might contribute to the genetic differentiation of populations on the landscape. Understanding the mechanism of the geographic range that affects gene flow and genetic structure is beneficial to maintain the genetic diversity. Here we investigated the landscape genetic structure of sixteen natural populations of apricot representing two natural distribution ranges of wild common apricots (P. armeniaca) and siberian apricots (P. sibirica) using 18 microsatellite markers. The siberian apricots, which were originated from the North and northeastern China, represented the richer genetic variation and diversity than that of siberian apricots. We found that P. sibirica populations in the Northeast and Northwest of China likely belonged to discrete genetic clusters, while the northwestern populations seemed isolated on the edge. We speculate that this pattern could be a result of the currently complex ecological environment associated with their wide habitats range from west to east in China. While, Central Asian P. armeniaca populations showed a highly admixed structure which was probably due to the recent introgression in a limited geographic distribution region. Meanwhile, we also implemented Isolate by distance (IBD) study on the relationship between both genetic differentiation and related geographic gradients pattern. Our results showed asignificant association between geographical distance and genetic distance among wild populations of Chinese P. sibirica but in Central Asian P. armeniaca. Therefore, our results suggested that the genetic structure associated with eco-geographic patterns could affect the genetic differentiation and diversity, which varied differently in case of different Armeniaca plants, which might have an implication for establishing a conservationstrategy maintaininggenetic diversityinthesespecies.

    参考文献
    相似文献
    引证文献
引用本文

刘 硕,Decroocq Veronique,张玉军,等.普通杏和西伯利亚杏野生居群遗传多样性与其地理分布关系研究[J].植物遗传资源学报,2020,21(6):1527-1538.

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:2020-04-17
  • 最后修改日期:2020-08-06
  • 录用日期:2020-08-07
  • 在线发布日期: 2020-11-05
  • 出版日期:
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