东非狒狒(灵长类:尾猿科)线粒体分支和形态的分布

D. Zinner, C. Keller, J. Nyahongo, T. Butynski, Y. D. Jong, L. Pozzi, S. Knauf, Rasmus Liedigk, C. Roos
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引用次数: 20

摘要

最近的遗传学研究,利用母系遗传的线粒体DNA,表明狒狒Papio类,特别是东非狒狒具有复杂的进化史。为了进一步解决这一问题并提高我们对东非狒狒系统地理模式的理解,我们分析了来自东非103个地点的148只狒狒样本的线粒体细胞色素b序列数据。由此产生的系统发育重建表明,狒狒最初分为四个主要分支:南部chacma狒狒、来自坦桑尼亚Mahale山脉的狒狒、南部主要狒狒和北部主要狒狒。我们确认,南部和北部分支的边界位于坦桑尼亚中部的乌加拉-马拉加拉西河和鲁阿哈-鲁菲济河沿岸。我们发现了新的线粒体单倍群,最值得注意的是Mahale山分支,并改进了单倍群分布。东非狒狒的进化分化很可能是由大量的种群分裂和重新联系引发和维持的,这可能主要与气候变化有关。为了更好地理解这些过程,需要核DNA信息,特别是评估种群间的基因流动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Distribution of Mitochondrial Clades and Morphotypes of Baboons Papio spp. (Primates: Cercopithecidae) in Eastern Africa
ABSTRACT Recent genetic studies, using maternally inherited mitochondrial DNA, indicate a complex evolutionary history for baboons Papio spp. in general, and for eastern African baboons in particular. To further address this topic and to improve our understanding of phylogeographic patterns of baboons in eastern Africa, mitochondrial cytochrome b sequence data were analysed from 148 baboon samples from 103 locations in eastern Africa. The resultant phylogenetic reconstructions suggest an initial split of baboons into four main clades: southern chacma baboons, baboons from Mahale Mountains in Tanzania, main southern, and main northern. We confirm that the boundary between southern and northern clades lies along the Ugalla-Malagarasi River and Ruaha-Rufiji River of central Tanzania. We detected new mitochondrial haplogroups, most notably the Mahale Mountains clade, and refined haplogroup distributions. The evolutionary divergence of baboons in eastern Africa was most likely triggered and maintained by numerous episodes of population division and reconnection, probably related mainly to climate change. To better understand these processes, nuclear DNA information is required, especially to assess gene flow among populations.
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