Phylogeography, mitochondrial DNA diversity, and demographic history of geladas (Theropithecus gelada)
Phylogeography, mitochondrial DNA diversity, and demographic history of geladas (Theropithecus gelada)
复制标题
狒狒 (Theropithecus gelada) 的系统发育地理学、线粒体 DNA 多样性和人口史
作者：
D. Zinner;Anagaw Atickem;J. Beehner;A. Bekele;T. Bergman;R. Burke;S. Dolotovskaya;Peter J. Fashing;S. Gippoliti;S. Knauf;Y. Knauf;Addisu Mekonnen;Amera Moges;Nga Nguyen;N. Stenseth;C. Roos
Papionini部落的大型陆生灵长类动物是世界上研究最多的动物之一，但对于这个部落的一些成员，我们对它们的进化史和系统地理知之甚少。狒狒（Theropithecus gelada r<s:1> ppell, 1835）是埃塞俄比亚高地特有的灵长类动物，在遗传多样性和属内系统发育方面大部分未被研究。目前，已知北部亚种和中部亚种以及一个孤立的南部亚种，其中中部亚种被列为最不关注亚种，北部亚种为易危亚种，南部亚种尚未被评估。亚种的分布和分类仍然不明确。在这里，我们基于整个物种范围的样本，估计了狒狒线粒体DNA （mtDNA）多样性和mtDNA谱系之间的系统发育关系。我们分析了来自162个粪便样本的1.7 kb长的mtDNA基因组序列，跨越细胞色素b基因和d环的高可变区I。我们发现了5个主要的单倍群或进化枝（south, central-1, central-2, north-1, north-2），它们在67万至43万年前分化，从而表明了快速辐射，导致了大部分未解决的属内系统发育关系。北部和中部的巢都包含两个相似的有效单倍群，每个单倍群在各自的单倍群之间很少或没有地理隔离。在末次盛冰期期间和之后，北部和中部冰丘的有效种群数量有所减少，而南部冰丘的有效种群数量保持稳定，但仍处于很低的水平。单倍群在推定的狒狒亚种地理范围内的分布表明，mtDNA序列信息不能提供可靠的分类推断，因此不足以解决三个大陆种群的分类等级问题，可能南部种群除外。然而，由于遗传差异，所有三个种群都值得保护，特别是最小的南部种群。
The large-bodied, terrestrial primates in the tribe Papionini are among the most intensely studied animals in the world, yet for some members of this tribe we know comparatively little about their evolutionary history and phylogeography. Geladas (Theropithecus gelada Rüppell, 1835), endemic primates of the Ethiopian highlands, are largely unstudied both in genetic diversity and intrageneric phylogeny. Currently, a northern and central subspecies and one isolated southern population are recognized, of which the central is classified as Least Concern, the northern as Vulnerable, and the southern is not yet assessed. The distribution and taxonomy of the subspecies remain poorly defined. Here, we estimate the mitochondrial DNA (mtDNA) diversity and phylogenetic relationships among gelada mtDNA lineages based on samples across the entire species range. We analysed 1.7 kb-long sequences of the mtDNA genome, spanning the cytochrome b gene and the hypervariable region I of the D-loop, derived from 162 faecal samples. We detected five major haplogroups or clades (south, central-1, central-2, north-1, north-2) which diverged between 0.67 and 0.43 million years ago, thus suggesting a rapid radiation, resulting in largely unresolved intrageneric phylogenetic relationships. Both, the northern and central demes contain two similarly valid haplogroups, each with little or no geographic segregation among respective haplogroups. Effective population sizes of the northern and central demes decreased during and after the last glacial maximum but remained stable for the southern deme, although on a very low level. The distribution of haplogroups within the geographic ranges of the putative gelada subspecies indicates that mtDNA sequence information does not allow reliable taxonomic inferences and thus is not sufficient for solving the taxonomic rank of the three demic populations, with the possible exception of the southern population. Nevertheless, due to the genetic differences all three populations deserve conservation efforts, in particular the smallest southern population.
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu
影响因子：
6.5
作者：
Chernomor O;von Haeseler A;Minh BQ
通讯作者：
Minh BQ