Genetic Structure and Demographic History of the Endangered and Endemic Schizothoracine Fish Gymnodiptychus pachycheilus in Qinghai-Tibetan Plateau

Junhu Su, Weihong Ji, Yanming Wei, Yanping Zhang, Dianne GLEESON, Lou Zhongyu, Jing Ren

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The endangered schizothoracine fish Gymnodiptychus pachycheilus is endemic to the Qinghai-Tibetan Plateau (QTP), but very little genetic information is available for this species. Here, we accessed the current genetic divergence of G. pachycheilus population to evaluate their distributions modulated by contemporary and historical processes. Population structure and demographic history were assessed by analyzing 1811-base pairs of mitochondrial DNA from 61 individuals across a large proportion of its geographic range. Our results revealed low nucleotide diversity, suggesting severe historical bottleneck events. Analyses of molecular variance and the conventional population statistic FST (0.0435, P = 0.0215) confirmed weak genetic structure. The monophyly of G. pachycheilus was statistically well-supported, while two divergent evolutionary clusters were identified by phylogenetic analyses, suggesting a microgeographic population structure. The consistent scenario of recent population expansion of two clusters was identified based on several complementary analyses of demographic history (0.096 Ma and 0.15 Ma). This genetic divergence and evolutionary process are likely to have resulted from a series of drainage arrangements triggered by the historical tectonic events of the region. The results obtained here provide the first insights into the evolutionary history and genetic status of this little-known fish.
    Original languageEnglish
    Pages (from-to)515-522
    Number of pages8
    JournalZoological Science
    Volume31
    Issue number8
    DOIs
    Publication statusPublished - 2014

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    plateaus
    demographic statistics
    history
    China
    population structure
    fish
    genetic variation
    tectonics
    endangered species
    monophyly
    drainage
    mitochondrial DNA
    statistics
    nucleotides
    phylogeny
    Gymnodiptychus pachycheilus

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    Su, Junhu ; Ji, Weihong ; Wei, Yanming ; Zhang, Yanping ; GLEESON, Dianne ; Zhongyu, Lou ; Ren, Jing. / Genetic Structure and Demographic History of the Endangered and Endemic Schizothoracine Fish Gymnodiptychus pachycheilus in Qinghai-Tibetan Plateau. In: Zoological Science. 2014 ; Vol. 31, No. 8. pp. 515-522.
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    abstract = "The endangered schizothoracine fish Gymnodiptychus pachycheilus is endemic to the Qinghai-Tibetan Plateau (QTP), but very little genetic information is available for this species. Here, we accessed the current genetic divergence of G. pachycheilus population to evaluate their distributions modulated by contemporary and historical processes. Population structure and demographic history were assessed by analyzing 1811-base pairs of mitochondrial DNA from 61 individuals across a large proportion of its geographic range. Our results revealed low nucleotide diversity, suggesting severe historical bottleneck events. Analyses of molecular variance and the conventional population statistic FST (0.0435, P = 0.0215) confirmed weak genetic structure. The monophyly of G. pachycheilus was statistically well-supported, while two divergent evolutionary clusters were identified by phylogenetic analyses, suggesting a microgeographic population structure. The consistent scenario of recent population expansion of two clusters was identified based on several complementary analyses of demographic history (0.096 Ma and 0.15 Ma). This genetic divergence and evolutionary process are likely to have resulted from a series of drainage arrangements triggered by the historical tectonic events of the region. The results obtained here provide the first insights into the evolutionary history and genetic status of this little-known fish.",
    keywords = "Qinghai-Tibetan Plateau, Gymnodiptychus pachycheilus, schizothoracine fishes, genetic structure, demographic history.",
    author = "Junhu Su and Weihong Ji and Yanming Wei and Yanping Zhang and Dianne GLEESON and Lou Zhongyu and Jing Ren",
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    Genetic Structure and Demographic History of the Endangered and Endemic Schizothoracine Fish Gymnodiptychus pachycheilus in Qinghai-Tibetan Plateau. / Su, Junhu; Ji, Weihong; Wei, Yanming; Zhang, Yanping; GLEESON, Dianne; Zhongyu, Lou; Ren, Jing.

    In: Zoological Science, Vol. 31, No. 8, 2014, p. 515-522.

    Research output: Contribution to journalArticle

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    AU - Su, Junhu

    AU - Ji, Weihong

    AU - Wei, Yanming

    AU - Zhang, Yanping

    AU - GLEESON, Dianne

    AU - Zhongyu, Lou

    AU - Ren, Jing

    PY - 2014

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    N2 - The endangered schizothoracine fish Gymnodiptychus pachycheilus is endemic to the Qinghai-Tibetan Plateau (QTP), but very little genetic information is available for this species. Here, we accessed the current genetic divergence of G. pachycheilus population to evaluate their distributions modulated by contemporary and historical processes. Population structure and demographic history were assessed by analyzing 1811-base pairs of mitochondrial DNA from 61 individuals across a large proportion of its geographic range. Our results revealed low nucleotide diversity, suggesting severe historical bottleneck events. Analyses of molecular variance and the conventional population statistic FST (0.0435, P = 0.0215) confirmed weak genetic structure. The monophyly of G. pachycheilus was statistically well-supported, while two divergent evolutionary clusters were identified by phylogenetic analyses, suggesting a microgeographic population structure. The consistent scenario of recent population expansion of two clusters was identified based on several complementary analyses of demographic history (0.096 Ma and 0.15 Ma). This genetic divergence and evolutionary process are likely to have resulted from a series of drainage arrangements triggered by the historical tectonic events of the region. The results obtained here provide the first insights into the evolutionary history and genetic status of this little-known fish.

    AB - The endangered schizothoracine fish Gymnodiptychus pachycheilus is endemic to the Qinghai-Tibetan Plateau (QTP), but very little genetic information is available for this species. Here, we accessed the current genetic divergence of G. pachycheilus population to evaluate their distributions modulated by contemporary and historical processes. Population structure and demographic history were assessed by analyzing 1811-base pairs of mitochondrial DNA from 61 individuals across a large proportion of its geographic range. Our results revealed low nucleotide diversity, suggesting severe historical bottleneck events. Analyses of molecular variance and the conventional population statistic FST (0.0435, P = 0.0215) confirmed weak genetic structure. The monophyly of G. pachycheilus was statistically well-supported, while two divergent evolutionary clusters were identified by phylogenetic analyses, suggesting a microgeographic population structure. The consistent scenario of recent population expansion of two clusters was identified based on several complementary analyses of demographic history (0.096 Ma and 0.15 Ma). This genetic divergence and evolutionary process are likely to have resulted from a series of drainage arrangements triggered by the historical tectonic events of the region. The results obtained here provide the first insights into the evolutionary history and genetic status of this little-known fish.

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