Molecular systematics of the genus Sigmodon: results from mitochondrial and nuclear gene sequences.

Molecular systematics of the genus Sigmodon: results from mitochondrial and nuclear gene sequences.
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DOI:
10.1139/z09-005
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发表时间:
2009-03-01
影响因子:
1.4
通讯作者:
Bradley RD
Bradley RD
中科院分区:
生物学4区
文献类型:
--
作者:
Henson DD;Bradley RD

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Say and Ord, 1825 使用来自多个基因区域的序列数据检查了 Sigmodon 属内的系统发育关系,包括核编码的光感受器间视黄酸结合蛋白的外显子 1、核 β-纤维蛋白原基因的内含子 7 以及来自代表 11 个 Sigmodon 物种的 27 个个体的线粒体细胞色素 b 基因。核基因进行独立分析、相互结合以及与线粒体数据结合。使用简约和贝叶斯方法构建拓扑,并通过引导程序和后验概率值提供节点支持。所有分析都恢复了四个独立的进化枝(I-IV),每个进化枝代表独特的物种组:hispidus、fulviventer、peruanus 和 alstoni。综合数据的分析也为先前提出的这些物种组内的关系提供了支持。
Phylogenetic relationships within the genus Sigmodon Say and Ord, 1825 were examined using sequence data from multiple gene regions, including exon 1 of the nuclear-encoded interphotoreceptor retinoid binding protein, intron 7 of the nuclear beta-fibrinogen gene, and the mitochondrial cytochrome b gene from 27 individuals representing 11 species of Sigmodon. Nuclear genes were analyzed independently, combined with each other, and combined with the mitochondrial data. Topologies were constructed using parsimony and Bayesian methods, with nodal support provided by bootstrap and posterior probability values. All analyses recovered four independent clades (I–IV), each representing unique species groups: hispidus, fulviventer, peruanus, and alstoni. The analyses from the combined data also provided support for relationships previously proposed within those species groups.
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