A mitochondrial phylogeographic scenario for the most widespread African rodent, Mastomys natalensis
A mitochondrial phylogeographic scenario for the most widespread African rodent, Mastomys natalensis
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DOI：
10.1111/bij.12013
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发表时间：
2013-04-01
影响因子：
1.9
通讯作者：
Lecompte, Emilie
中科院分区：
文献类型：
--
作者：
Colangelo, Paolo;Verheyen, Erik;Lecompte, Emilie
为了评估地质、环境和气候变化对natalensis遗传变异空间分布的贡献，我们分析了该物种整个分布区域的细胞色素序列，以推断其系统地理结构和历史人口统计学。在更新世期间分化出6个支持良好的系统群。在大陆尺度上，没有发现遗传距离和地理距离之间的显著相关性，所观察到的种群的地理分布是由于假定存在地理和生态障碍而造成的长时间隔离造成的。多样性事件可能受到栖息地收缩/扩张周期的影响，这种周期可能补充了地形障碍，从而诱发遗传漂变和谱系分选。根据我们的研究结果，我们提出了一种情景，即气候驱动的过程可能在种群之间的分化中发挥了主要作用。(c) 2013年伦敦林奈学会
In order to evaluate the contribution of geological, environmental, and climatic changes to the spatial distribution of genetic variation of Mastomys natalensis, we analysed cytochromeb sequences from the whole distribution area of the species to infer its phylogeographic structure and historical demography. Six well-supported phylogroups, differentiated during the Pleistocene, were evidenced. No significant correlation between genetic and geographic distances was found at the continental scale, and the geographic distributions of the observed phylogroups have resulted from extensive periods of isolation caused by the presence of putative geographic and ecological barriers. The diversification events were probably influenced by habitat contraction/expansion cycles that may have complemented topographic barriers to induce genetic drift and lineage sorting. According to our results, we propose a scenario where climate-driven processes may have played a primary role in the differentiation among phylogroups.(c) 2013 The Linnean Society of London