Pre-Historic and Recent Vicariance Events Shape Genetic Structure and Diversity in Endangered Lion-Tailed Macaque in the Western Ghats: Implications for Conservation.
Pre-Historic and Recent Vicariance Events Shape Genetic Structure and Diversity in Endangered Lion-Tailed Macaque in the Western Ghats: Implications for Conservation.
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西高止山脉濒临灭绝的狮子尾猕猴中的史前和近期的替代事件塑造了遗传结构和多样性：对保护的影响。
DOI：
10.1371/journal.pone.0142597
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Umapathy G
中科院分区：
文献类型：
--
作者：
Ram MS;Marne M;Gaur A;Kumara HN;Singh M;Kumar A;Umapathy G
种群的遗传隔离是一种强大的力量，有助于塑造进化过程。然而，与世隔绝的小种群，特别是在支离破碎的景观中，已知会失去遗传变异性，患有近亲交配衰退，并在基因上相互分化。在这项研究中，我们评估了生活在阿纳马拉山脉破碎景观中的狮尾猕猴(Macaca Silenus)的遗传多样性，并研究了该物种在西高止山脉分布范围内的遗传结构。我们对野生和人工饲养的个体进行了覆盖两个线粒体区域-高变区-i和部分线粒体细胞色素b-的约900个碱基的DNA测序，构建了系统发育树并确定了时间。我们发现，与在更大和连续的森林中的部队相比，阿纳马莱山区与世隔绝的森林中的狮尾猕猴部队已经耗尽了线粒体DNA多样性。我们的结果还揭示了狮尾猕猴在帕尔加特峡谷的两个截然不同的种群中的古老分化，可以追溯到211万年前。根据我们的发现，我们对野生种群和圈养种群的管理提出了一些建议。
Genetic isolation of populations is a potent force that helps shape the course of evolution. However, small populations in isolation, especially in fragmented landscapes, are known to lose genetic variability, suffer from inbreeding depression and become genetically differentiated among themselves. In this study, we assessed the genetic diversity of lion-tailed macaques (Macaca silenus) inhabiting the fragmented landscape of Anamalai hills and examined the genetic structure of the species across its distributional range in the Western Ghats. We sequenced around 900 bases of DNA covering two mitochondrial regions–hypervariable region-I and partial mitochondrial cytochrome b–from individuals sampled both from wild and captivity, constructed and dated phylogenetic trees. We found that the lion-tailed macaque troops in the isolated forest patches in Anamalai hills have depleted mitochondrial DNA diversity compared to troops in larger and continuous forests. Our results also revealed an ancient divergence in the lion-tailed macaque into two distinct populations across the Palghat gap, dating to 2.11 million years ago. In light of our findings, we make a few suggestions on the management of wild and captive populations.