...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Genetic variation and geographic differentiation in the marine triclad Bdelloura candida (Platyhelminthes, Tricladida, Maricola), ectocommensal on the American horseshoe crab Limulus polyphemus
【24h】

Genetic variation and geographic differentiation in the marine triclad Bdelloura candida (Platyhelminthes, Tricladida, Maricola), ectocommensal on the American horseshoe crab Limulus polyphemus

机译：在美国马蹄蟹Limul的海洋三头BBdelloura candida（Platyhelminthes，Tricladida，Maricola）的遗传变异和地理分化

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

Bdelloura candida (Platyhelminthes, Tricladida, Maricola) is an ectocommensal symbiont on the American horseshoe crab Limulus polyphemus, living on the book gills and appendages, where it spends its entire life. Given its limited dispersal capabilities and its inability to live outside of the host, we hypothesized a genetic structure that parallels that of its host. We obtained 84 planarian individuals from 19 horseshoe crabs collected from 10 sites from Massachusetts to Florida. We amplified the mitochondrial 16S rRNA and the nuclear internal transcribed spacer 2 and conducted phylogeographic and population genetic analyses, which show a clear and strong genetic break between the populations in the Atlantic and the Gulf coasts. Among the Atlantic populations, two additional, weaker barriers located along Cape Hatteras and Cape Cod restrict gene flow. Even though previous studies have suggested that the populations of the host may be in decline, those of B. candida remain stable, and some even shows signatures of expansion. Our results indicate that the phylogeography of these marine ectocommensal triclads closely mirrors that of its Limulus host, and highlight the challenges to both host and symbiont to genetically connect populations across their distribution.
机译：Bdelloura candida（Platyhelminthes，Tricladida，Maricola）是美国horse蟹Li属的一个共生共生体，生活在书g和附属物上，一生都在这里生活。鉴于其有限的散布能力和无法生活在寄主之外，我们假设其遗传结构与其寄主相似。我们从马萨诸塞州至佛罗里达州的10个地点收集的19只horse中获得了84个平面动物。我们扩增了线粒体16S rRNA和核内转录间隔区2，并进行了系统地理学和种群遗传分析，显示了大西洋和墨西哥湾沿岸种群之间清晰而有力的遗传断裂。在大西洋人口中，沿哈特拉斯角和科德角分布的另外两个较弱的屏障限制了基因的流动。即使以前的研究表明寄主的种群可能正在减少，但念珠菌的种群仍保持稳定，有些甚至显示出扩展的迹象。我们的研究结果表明，这些海洋外来的三生动物的谱系与Li属寄主的谱系非常相似，并突出了寄主和共生体在其分布范围内将种群遗传联系起来的挑战。

著录项

  • 来源
    《Marine biology》 |2017年第5期|111.1-111.14|共14页
  • 作者

    Riesgo Ana; Burke Emily A.; Laumer Christopher; Giribet Gonzalo;

  • 作者单位

    Nat Hist Museum London, Dept Life Sci, Invertebrate Div, Cromwell Rd, London SW7 5BD, England;

    Harvard Univ, Museum Comparat Zool, Dept Organism & Evolutionary Biol, 26 Oxford St, Cambridge, MA 02138 USA;

    EMBL European Bioinformat Inst, Wellcome Trust Genome Campus, Hinxton CB10 1SD, Cambs, England|Wellcome Trust Sanger Inst, Wellcome Trust Genome Campus, Hinxton CB10 1SA, Cambs, England;

    Harvard Univ, Museum Comparat Zool, Dept Organism & Evolutionary Biol, 26 Oxford St, Cambridge, MA 02138 USA;

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

相似文献

  • 外文文献
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