Multiple nuclear loci reveal patterns of incomplete lineage sorting and complex species history within western mouse lemurs (Microcebus)
Multiple nuclear loci reveal patterns of incomplete lineage sorting and complex species history within western mouse lemurs (Microcebus)
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DOI：
10.1016/j.ympev.2007.03.005
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发表时间：
2007-05-01
影响因子：
4.1
通讯作者：
Yoder, Anne D.
中科院分区：
文献类型：
--
作者：
Heckman, Kellie L.;Mariani, Carol L.;Yoder, Anne D.
鼠狐猴（鼠狐猴属）是马达加斯加岛特有的夜行灵长类动物。直到最近，它们被分为两个物种，一个来自马达加斯加东部，一个来自马达加斯加西部。然而，先前发表的形态计量学和线粒体DNA数据分析显示，强有力地支持对超过8种物种的识别。在这里，我们用来自四个独立分离的核位点的DNA数据来检验八种假设。我们发现线粒体和核数据之间的许多区域是一致的，但不完整的谱系分类和低突变率限制了核数据的系统发育分辨率。即便如此，核基因座一致地在鼠狐猴辐射中发现了三个深度分化的谱系的证据：一个与mtDNA“南方分支”一致，另一个与mtDNA“北方分支”一致，还有一个由Microcebus ravelobensis组成的单一分支。后一个结果特别强调了对该物种进行仔细生物学研究的必要性。(C) 2007爱思唯尔公司版权所有。
Mouse lemurs (genus Microcebus) are nocturnal primates endemic to the island of Madagascar. Until recently, they were classified as two species, one from eastern and one from western Madagascar. Previously published analyses of morphometric and mitochondrial DNA data show strong support for the recognition of more than eight species, however. Here, we test the eight-species hypothesis with DNA data derived from four independently segregating nuclear loci. We find many areas of congruence between the mitochondrial and nuclear data, but incomplete lineage sorting and low mutation rates limit the phylogenetic resolution of the nuclear data. Even so, the nuclear loci unanimously find evidence for three deeply diverged lineages within the mouse lemur radiation: one that is congruent with the mtDNA "southern clade", another that is congruent with the mtDNA "northern clade", and one monospecific branch comprised of the species Microcebus ravelobensis. The latter result in particular emphasizes the need for careful biological study of this species. (C) 2007 Elsevier Inc. All rights reserved.