Rodent phylogeny and a timescale for the evolution of glires: Evidence from an extensive taxon sampling using three nuclear genes
Rodent phylogeny and a timescale for the evolution of glires: Evidence from an extensive taxon sampling using three nuclear genes
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DOI：
10.1093/oxfordjournals.molbev.a004164
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发表时间：
2002-07-01
影响因子：
10.7
通讯作者：
Douzery, EJP
中科院分区：
文献类型：
--
作者：
Huchon, D;Madsen, O;Douzery, EJP
啮齿目是胎盘哺乳动物中最大的目，约有2，050种，分为28科。它也是最有争议的关于其单系性，家庭之间的关系，和分歧日期之一。在这里，我们分析和比较了三个核基因（血管性血友病因子，interphotoreceptor类视色素结合蛋白，和α 2B肾上腺素能受体）的性能为一个大的分类采样，涵盖了整个啮齿动物和胎盘的多样性。系统发育的结果显着支持啮齿动物单系，啮齿动物与兔形目（的Glires分支），和一个Glires + Euarchonta（灵长类，Dermoptera，Scandentia）分支的协会。啮齿动物之间关系的分辨率也大大提高。目前公认的科在这里被分为七个明确的分支（Anomaluromorpha，Castoridae，Ctenohystrica，Geomyoidea，Gliridae，Myodonta和Sciuroidea），可以分为三个主要分支：Ctenohystrica，Gliridae + Sciuroidea和一个与小鼠相关的分支（Anomaluromorpha，Castoridae + Geomyoidea和Myodonta）。基于这三个基因的分子测年结果表明，啮齿动物辐射发生在古新世和始新世之间的过渡。啮齿动物和兔形动物的分歧正好位于K-T边界，也是晚白垩世胎盘动物之间的第一次分裂。因此，我们的研究结果倾向于调和分子和形态古生物学的见解。
Rodentia is the largest order of placental mammals, with approximately 2,050 species divided into 28 families. It is also one of the most controversial with respect to its monophyly, relationships between families, and divergence dates. Here, we have analyzed and compared the performance of three nuclear genes (von Willebrand Factor, interphotoreceptor retinoid-binding protein, and Alpha 2B adrenergic receptor) for a large taxonomic sampling, covering the whole rodent and placental diversity. The phylogenetic results significantly support rodent monophyly, the association of Rodentia with Lagomorpha (the Glires clade), and a Glires + Euarchonta (Primates, Dermoptera, and Scandentia) clade. The resolution of relationships among rodents is also greatly improved. The currently recognized families are divided here into seven well-defined clades (Anomaluromorpha, Castoridae, Ctenohystrica, Geomyoidea, Gliridae, Myodonta, and Sciuroidea) that can be grouped into three major clades: Ctenohystrica, Gliridae + Sciuroidea, and a mouse-related clade (Anomaluromorpha, Castoridae + Geomyoidea, and Myodonta). Molecular datings based on these three genes suggest that the rodent radiation took place at the transition between Paleocene and Eocene. The divergence between rodents and lagomorphs is placed just at the K-T boundary and the first splits among placentals in the Late Cretaceous. Our results thus tend to reconcile molecular and morphological-paleontological insights.