Low genetic diversity in a critically endangered primate: shallow evolutionary history or recent population bottleneck?
Low genetic diversity in a critically endangered primate: shallow evolutionary history or recent population bottleneck?
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极度濒危灵长类动物遗传多样性低：浅层进化历史还是最近的种群瓶颈？
DOI：
10.1186/s12862-019-1451-y
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发表时间：
2019-06
影响因子：
3.4
通讯作者：
Yao Meng
中科院分区：
文献类型：
--
作者：
Wang Weiran;Zheng Yitao;Zhao Jindong;Yao Meng
种群遗传变异的当前模式可能是由长期的进化历史和当代人口统计过程形成的。了解产生这些模式的潜在机制对于濒危物种的知情保护至关重要。极度濒危的白头叶猴（Trachypithecus leucocephalus）是中国西南地区一个狭窄地区的特有物种。该物种在富绥和崇左两个主要遗居群的遗传多样性很低。这是由短暂的进化历史还是最近的人口减少造成的尚不清楚。因此，我们利用15个核微卫星标记和线粒体DNA （mtDNA）控制区序列，研究了历史和近期人口统计学变化对种群遗传多样性的贡献。结果利用214个个体的遗传资料，发现富绥群体共有9个mtDNA单倍型，而崇左群体只有1个mtDNA单倍型，总体遗传多样性较低（单倍型和核苷酸多样性：h= 0.486±0.036;π= 0.0028±0.0003）。从mtDNA和微卫星标记推断的人口历史没有显示历史人口规模波动或最近人口瓶颈的证据。通过DIYABC分析推测出的可能的种群分化历史的模拟结果表明，崇左种群与富绥种群在近期出现了分化，没有出现种群瓶颈。结论尽管上个世纪人类活动导致白头叶猴种群数量严重下降，但白头叶猴种群遗传多样性低的主要原因可能是该物种的进化历史较浅，以及最近的局部种群建立事件。
BackgroundCurrent patterns of population genetic variation may have been shaped by long-term evolutionary history and contemporary demographic processes. Understanding the underlying mechanisms that yield those patterns is crucial for informed conservation of endangered species. The critically endangered white-headed langur,Trachypithecus leucocephalus, is endemic to a narrow range in southwest China. This species shows very low genetic diversity in its 2 main relict populations, Fusui and Chongzuo. Whether this has been caused by a short evolutionary history or recent population declines is unknown. Therefore, we investigated the contributions of historical and recent population demographic changes to population genetic diversity by using 15 nuclear microsatellite markers and mitochondrial DNA (mtDNA) control region sequences.ResultsUsing genetic data from 214 individuals we found a total of 9 mtDNA haplotypes in the Fusui population but only 1 haplotype in the Chongzuo population, and we found an overall low genetic diversity (haplotype and nucleotide diversities:h= 0.486 ± 0.036;π= 0.0028 ± 0.0003). The demographic history inferred from mtDNA and microsatellite markers revealed no evidence for historical population size fluctuations or recent population bottlenecks. Simulations of possible population divergence histories inferred by DIYABC analysis supported a recent divergence of the Chongzuo population from the Fusui population and no population bottlenecks.ConclusionsDespite severe population declines caused by anthropogenic activities in the last century, the low genetic diversity of the extant white-headed langur populations is most likely primarily due to the species’ shallow evolutionary history and to a recent, local population founder event.
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极度濒危灵长类白头猿的遗传多样性较低，种群结构因人为栖息地破碎化而形成
影响因子：
3.8
作者：
Weiran Wang;Yu Qiao;Sheng Li;Wenshi Pan;Meng Yao
通讯作者：
Meng Yao
影响因子：
3.7
作者：
Liu Z;Wang B;Nadler T;Liu G;Sun T;Huang C;Zhou Q;Zhou J;Que T;Wang Z;Roos C;Li M
通讯作者：
Li M
DOI：
--
发表时间：
2014
期刊：
Sichuan Journal of Zoology
影响因子：
--
作者：
Wang Zhenxin
通讯作者：
Wang Zhenxin
影响因子：
5.8
作者：
Cornuet, Jean-Marie;Santos, Filipe;Beaumont, Mark A.;Robert, Christian P.;Marin, Jean-Michel;Balding, David J.;Guillemaud, Thomas;Estoup, Arnaud
通讯作者：
Estoup, Arnaud
影响因子：
2.5
作者：
Zhaoyuan Li;M. Rogers
通讯作者：
Zhaoyuan Li;M. Rogers