基于线粒体DNA序列对棘齿鲨复合体地理分布和系统地理学的重新评价。

Robert D Bradley, Dallas D Henson, Nevin D Durish
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引用次数: 0

摘要

利用线粒体细胞色素-b基因的DNA序列,研究了毛毛鳞毛猴复合体(Sigmodon hirsutus, S. hispidus和S. toltecus)成员之间的地理分布。每个分类单元的地理分布是根据从北美洲、中美洲和南美洲收集的69个样本(19个是新获得的,50个是以前的研究)获得的DNA序列确定的。这些数据表明,S. hispidus局限于美国南部一半和墨西哥东北部(Nuevo León和塔毛利帕斯州),S. toltecus占据墨西哥东部三分之一(塔毛利帕斯州中部)到洪都拉斯北部,S. hirsutus分布于恰帕斯州中部和瓦哈卡州东南部到南美洲北部(委内瑞拉)。新收集的资料将S. hispidus的分布范围从美国南部向南扩展到墨西哥东北部,S. toltecus的分布范围从墨西哥恰帕斯向南扩展到洪都拉斯。研究了各分类单元的遗传分化和系统地理格局。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
RE-EVALUATION OF THE GEOGRAPHIC DISTRIBUTION AND PHYLOGEOGRAPHY OF THE SIGMODON HISPIDUS COMPLEX BASED ON MITOCHONDRIAL DNA SEQUENCES.

Geographic distribution among members of the Sigmodon hispidus complex (Sigmodon hirsutus, S. hispidus, and S. toltecus) were examined using DNA sequences from the mitochondrial cytochrome-b gene. Geographic distribution of each taxon was defined based on DNA sequences obtained from 69 samples (19 newly obtained and 50 from previous studies) collected from North, Central, and South America. These data indicated that S. hispidus is restricted to the southern one-half of the United States and northeastern Mexico (Nuevo León and Tamaulipas), S. toltecus occupies the eastern one-third of Mexico (central Tamaulipas) to northern Honduras, and S. hirsutus is distributed from central Chiapas and southeastern Oaxaca to northern South America (Venezuela). The newly collected data extend distributions of S. hispidus from the southern United States southward into northeastern Mexico and that of S. toltecus from Chiapas, Mexico, southward to Honduras. Genetic divergence and patterns of phylogeography were examined within each taxon.

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