Quaternary climate and environmental changes have shaped genetic differentiation in a Chinese pheasant endemic to the eastern margin of the Qinghai-Tibetan Plateau
Quaternary climate and environmental changes have shaped genetic differentiation in a Chinese pheasant endemic to the eastern margin of the Qinghai-Tibetan Plateau
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第四纪气候和环境变化影响了青藏高原东缘特有的中华雉的遗传分化
DOI：
10.1016/j.ympev.2012.12.013
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发表时间：
2013-04-01
影响因子：
4.1
通讯作者：
Zhang, Zhengwang
中科院分区：
文献类型：
--
作者：
Gu, Langyu;Liu, Yang;Zhang, Zhengwang
青藏高原隆升产生的地质复杂性和由此产生的生境异质性，与第四纪的气候振荡共同作用，对该地区动物种群的遗传多样性和人口学格局产生了深远的影响。为了了解第四纪气候和环境变迁对种内遗传格局和进化史的影响，我们对高原最东端的特有鸟类蓝马鸡(Crossoptilon Auritum)的种群遗传结构进行了研究。我们对线粒体DNA序列和8个常染色体微卫星的系统地理分析表明，蓝马鸡分为四个不同的亚群：中心群(互助山和太子山)、南部若尔盖群、最南边的王浪群和最北边的贺兰山群。这些群可能在更新世发生了分歧，与青藏高原东缘发生的地质变化和间冰期-冰川气候振荡相对应。因此，这些亚群代表了主要的保护单位，特别是对于孤立的贺兰亚群。我们的发现提供了由复杂的第四纪气候和环境变化驱动的种群分化的证据，并再次强调了系统地理研究对保护工作的重要性。(C)2012 Elsevier Inc.保留所有权利。
The geological complexity generated by the uplift of the Qinghai-Tibetan Plateau and the resulting habitat heterogeneity have functioned together with climatic oscillations in the Quaternary to have a profound impact on the patterns of genetic diversity and demography of the fauna in this region. To understand the effect of the climatic and environmental shifts of the Quaternary on intraspecific genetic patterns and evolutionary history, we investigated the population genetic structure of the blue eared pheasant (Crossoptilon auritum), an endemic bird inhabiting the easternmost region of the plateau. Our phylogeographic analysis of mitochondrial DNA sequences and eight autosomal microsatellites reveals that the blue eared pheasant is subdivided into four distinct subpopulations: a central group (Huzhu and Taizi Mountains), a southern Zoige group, a southernmost Wanglang group and the northernmost Helan Mountain group. These groups are likely to have diverged in the Pleistocene, corresponding to geological changes and the interglacial-glacial climate oscillations that occurred at the eastern margin of the Qinghai-Tibetan Plateau. These subpopulations thus represent major conservation units, especially for the isolated Helan subpopulation. Our findings provide evidence of population divergence driven by complex Quaternary climate and environmental changes and, once more, highlight the importance of phylogeographic studies for conservation endeavours. (C) 2012 Elsevier Inc. All rights reserved.