...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Genome-wide population genetic analysis identifies evolutionary forces establishing continuous population divergence
【24h】

Genome-wide population genetic analysis identifies evolutionary forces establishing continuous population divergence

机译：全基因组人口遗传分析确定了建立连续种群差异的进化力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Elucidating the mechanism shaping the spatial variations of traits has long been a central concern of evolutionary biologists. Geographic clines of allele/morph frequencies along environmental gradients are suggested to be established and maintained by the balancing of two opposing evolutionary forces, namely selection that generates spatial differentiation in morph frequencies, and selection and/or stochastic factors that lead to the coexistence of multiple morphs within a population. Thus, testing for both selection and stochastic factors is necessary for a comprehensive understanding of the mechanism underlying clinal variation in morph/allele frequency in natural populations. Here, I identified the evolutionary forces responsible for clinal variation of color morph frequency in Ischnura senegalensis by comparing the population divergence of putatively neutral loci generated by high-throughput next-generation sequencing (F (STn)) with that of the putative color locus (F (STc)). No strong correlation was observed between F (STn) and F (STc), suggesting that stochastic factors contribute less to color-locus population divergence. F (STc) was less than F (STn) between populations exposed to similar environmental conditions, but greater than F (STn) between populations exposed to different environmental conditions, suggesting that both balancing selection and divergent selection act on the color locus. Therefore, two antagonistic selection factors rather than stochastic and historical factors contribute to establishing the clinal variation of morph frequency in I. senegalensis.
机译：阐明形成性状空间变异的机制长期以来一直是进化生物学家关注的重点。建议通过平衡两个相反的进化力来建立和维持沿着环境梯度的等位基因/形态频率的地理谱系，即，在形态频率上产生空间差异的选择，以及导致多重共存的选择和/或随机因素群体中的变形。因此，必须对选择因素和随机因素进行测试，才能全面了解自然种群中形态/等位基因频率逐渐变化的基本机制。在这里，我通过比较高通量下一代测序（F（STn））产生的推定中性位点与推定颜色位点（Sn）的内在位点的种群差异，确定了导致塞内加尔海藻颜色形态频率发生梯度变化的进化力。 F（STc））。在F（STn）和F（STc）之间没有观察到强烈的相关性，表明随机因素对色基因座种群差异的贡献较小。在相似环境条件下的种群之间的F（STc）小于F（STn），但在不同环境条件下的种群之间的F（STn）大于F（STn），这表明平衡选择和发散选择都对颜色位点起作用。因此，两个对立的选择因素而不是随机的和历史的因素有助于建立塞内加尔毛虫形态频率的最终变化。

著录项

  • 来源
    《Ecological research》 |2017年第4期|461-468|共8页
  • 作者

    Takahashi Yuma;

  • 作者单位

    Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Aoba Ku, 6-3 Aoba, Sendai, Miyagi 9808578, Japan|Tohoku Univ, Grad Sch Life Sci, Div Ecol & Evolutionary Biol, Aoba Ku, 6-3 Aoba, Sendai, Miyagi 9808578, Japan|Chiba Univ, Dept Biol, Fac Sci, 1-33 Yayoi, Chiba 2638522, Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Balancing selection; Cline; Damselfly; Divergent selection; Stochastic factor;

    机译：均衡选择;克林线;单身汉;发散选择;随机因素;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号