Higher-level systematics of rodents and divergence time estimates based on two congruent nuclear genes
Higher-level systematics of rodents and divergence time estimates based on two congruent nuclear genes
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DOI：
10.1016/s1055-7903(02)00304-4
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发表时间：
2003-03-01
影响因子：
4.1
通讯作者：
Honeycutt, RL
中科院分区：
文献类型：
--
作者：
Adkins, RM;Walton, AH;Honeycutt, RL
对生长激素受体和BRCA1两个核基因的4600多个核苷酸序列进行的系统发育分析，提供了一致的系统发育图，描述了啮齿动物主要谱系之间的关系。单独和综合分析得到了五个主要结论：(1)强烈支持一个单一的Myodonta(包含Muroidae+Dipodoidae超科)，其中沙鼠亚科比Sigmodontinae与Murinae的亲缘关系更近；(2)Castoridae和Gemyoidae超科之间的姐妹群关系；(3)Ctenohystraa的单系(包括Suravida和Hystraognatha亚目)；(4)Myodonta(肌形目亚目)、Pedetes(Pedetidae亚目，Anomalphoma亚目)、Castoridae(尿形亚目)+Geomyidae(肌亚目)和Ctenostraa的近亲关系；和(5)包含Graphiurus(Gliridae科，肌形亚目)和Sciuroforma的两个成员(Sciuridae+Aplodontidae)的单系群的基本位置。使用合并的数据也估计了啮齿动物和灵长类动物之间的分歧日期。应用全球分子时钟和灵长类动物校准点，啮齿动物之间的分歧日期超过了基于化石的日期，但通常与在类似条件下估计的其他基于分子的日期一致。然而，当应用一个松弛的分子时钟时，估计的分歧日期与化石记录高度一致。(C)2002年埃尔塞维尔科学公司(美国)。版权所有。
Phylogenetic analysis of over 4600 aligned nucleotide sequences from two nuclear genes, growth hormone receptor and BRCA1, provided congruent phylogenies depicting relationships among the major lineages of rodents. Separate and combined analyses resulted in five major conclusions: (1) strong support for a monophyletic Myodonta (containing the superfamilies Muroidea + Dipodoidea), with subfamily Gerbillinae being more closely related to Murinae than is Sigmodontinae; (2) a sistergroup relationship between the family Castoridae and the superfamily Geomyoidea; (3) monophyly of Ctenohystrica (containing the suborders Sciuravida and Hystricognatha); (4) a near polytomy among Myodonta (suborder Myomorpha), Pedetes (family Pedetidae, suborder Anomaluromorpha), Castoridae (suborder Sciuromorpha) + Geomyoidea (suborder Myomorpha), and Ctenohystrica; and (5) basal position of a monophyletic group containing Graphiurus (family Gliridae, suborder Myomorpha) + two members of the Sciuromorpha (Sciuridae + Aplodontidae). Divergence dates among rodents and primates were also estimated using the combined data. Applying a global molecular clock and a primate calibration point, divergence dates among rodents exceeded fossil-based dates but were generally compatible with other molecule-based dates estimated under similar conditions. However, when a relaxed molecular clock was applied, estimated divergence dates were highly compatible with the fossil record. (C) 2002 Elsevier Science (USA). All rights reserved.