Ruiz-García Manuel, Randi Ettore, Martínez-Agüero María, Alvarez Diana
Unidad de Genética (Genética de Poblaciones-Biología Evolutiva), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá DC, Colombia.
Rev Biol Trop. 2007 Jun;55(2):723-41.
The current work shows two molecular phylogenetic analyses on Neotropical deers. In the first analysis, the mitochondrial control region (D-loop) was sequenced in six Odocoileinae species from Latin America, using the sequences of two Muntiacinae as outgroups. The results obtained were as follows: A sequence of Mazama americana showed a striking relationship with several sequences of Odocoileus in contrast to that expected, since this M. americana haplotype, from a Mexican origin, was not associated with several Bolivian Mazama sequences analyzed. This could put forward that this genera is not monophyletic. On the other hand, these Bolivian Mazama formed a clade with Pudu puda and Ozotoceros bezoarticus. Likely, an Odocoileus virginianus sequence from the Central area of Colombia showed a more strong relationship with a Northamerican O. heminonus sequence than with the other O. virginianus sequences of Colombian origin as well. This could be explained by means of various different hypotheses. The first is the existence of common ancestral haplotypes between both species. Another one is the reiterative hybridization among both Odocoileus species before the migration of O. virginianus from North America to South America. Moreover, the maximum parsimony analysis showed an intense relationship between the Muntiacinae and this Neotropical Cervidae clade. In addition, and adding credence to the relevant polyphyletism found in Mazama by means of the mitochondrial control region DNA sequences, a second analysis with 16 DNA microsatellite loci also showed a higher genetic relationship between M. americana and O. virginianus, than between the first species regard to Mazama gouazoubira.
当前的研究展示了对新热带区鹿类的两种分子系统发育分析。在第一次分析中,对来自拉丁美洲的六种南美泽鹿亚科物种的线粒体控制区(D环)进行了测序,以两种麂亚科物种的序列作为外类群。得到的结果如下:美洲泽鹿的一个序列与白尾鹿的几个序列呈现出显著的关系,这与预期相反,因为这个来自墨西哥的美洲泽鹿单倍型与所分析的几个玻利维亚南美泽鹿序列并无关联。这可能表明该属并非单系的。另一方面,这些玻利维亚南美泽鹿与普度鹿和草原鹿形成了一个分支。同样,来自哥伦比亚中部地区的白尾鹿序列与北美黑尾鹿的一个序列的关系,比与其他哥伦比亚原产的白尾鹿序列的关系更为密切。这可以通过各种不同的假说来解释。第一个假说是两个物种之间存在共同的祖先单倍型。另一个假说是在白尾鹿从北美迁徙到南美之前,这两个白尾鹿物种之间反复发生杂交。此外,最大简约法分析显示麂亚科与这个新热带区鹿科分支之间存在密切关系。此外,通过线粒体控制区DNA序列在南美泽鹿中发现了相关的多系现象,进一步证实这一点的是,对16个DNA微卫星位点的第二次分析也表明,美洲泽鹿与白尾鹿之间的遗传关系,比第一种与南美泽鹿之间的遗传关系更高。