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首页> 外文期刊>Journal of Fish Biology >Contemporary factors influencing genetic diversity in the Alaska humpback whitefish Coregonus clupeaformis complex
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Contemporary factors influencing genetic diversity in the Alaska humpback whitefish Coregonus clupeaformis complex

机译：影响阿拉斯加遗传多样性的当代因素驼背白鲑鱼Clupeaformis复合物

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摘要

Thirteen microsatellite loci were used to address three hypotheses regarding genetic diversity in the humpback whitefish Coregonus clupeaformis complex in Alaska. The test results provided further insight into the factors influencing C. clupeaformis complex population structure and level of genetic variation. First, the microsatellite data did not provide evidence of two spatially distinct Beringian and Eurasian refugial groups as revealed in previous phylogeographic analyses of mitochondrial DNA variation. Rather, the population structure inferred from the microsatellite variation appears to reveal the influence of factors on a more recent time scale, including gene flow among the refugial groups and isolation of some anadromous and freshwater resident populations. Second, anadromous C. clupeaformis complex collections exhibited higher intra-population genetic diversity than freshwater resident collections. This outcome is consistent with previous meta analyses suggesting that freshwater resident populations probably have smaller historical effective population sizes and less conspecific gene flow because the habitat tends to be smaller and supports fewer and smaller populations. Finally, the analysis of contemporary immigration rates was consistent with, but did not provide statistical support for, the hypothesis that gene flow among anadromous C. clupeaformis complex populations along coastal Alaska is influenced by the Alaska Coastal Current. Further studies are needed to evaluate gene flow among coastal Alaska C. clupeaformis complex populations.
机译：三十微卫星基因座用于解决阿拉斯加驼背白鱼核心综合体中遗传多样性的三个假设。测试结果进一步了解影响C. Clupeaformis复杂群体结构和遗传变异水平的因素。首先，微卫星数据没有提供两种空间不同的破碎和欧亚难民群的证据，如先前的线粒体DNA变异分析中透露。相反，从微卫星变异中推断的人口结构似乎揭示了因素对更近期时间尺度的影响，包括难民群体中的基因流，以及一些阿内特水和淡水居民群体的分离。其次，甲酰胺C. ClupeaFormis复杂收集比淡水居民收集呈现出更高的群体遗传多样性。这种结果与之前的META分析一致，表明淡水居民群体可能具有较小的历史有效种群尺寸和较少的群体的基因流，因为栖息地往往更小，并且支持更少且较小的人口。最后，对当代移民率的分析符合，但没有提供统计支持，该假设是沿着沿海阿拉斯加沿着沿海阿拉斯加的Clupeaformis复杂种群的基因流动受阿拉斯加沿海电流的影响。需要进一步的研究来评估沿海阿拉斯加C. clupeaformis复合种群之间的基因流动。

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  • 来源
    《Journal of Fish Biology》 |2018年第4期|共17页
  • 作者

    Olsen J. B.; Brown R. J.; Russ O. L.; Harper K.; Wenburg J. K.;

  • 作者单位

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

    US Fish &

    Wildlife Serv Fairbanks Fish &

    Wildlife Field Off 101 12th Ave Room 222 Fairbanks AK 99701 USA;

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

    US Fish &

    Wildlife Serv Kenai Fish &

    Wildlife Field Off POB 1670 Kenai AK 99611 USA;

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

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

    Alaska; Coregonidae; genetic diversity; humpback whitefish;

    机译：阿拉斯加;Coregonidae;遗传多样性;驼背白鲑;

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