A molecular phylogenetic analysis in Gymnotus species (Pisces: Gymnotiformes) with inferences on chromosome evolution
A molecular phylogenetic analysis in Gymnotus species (Pisces: Gymnotiformes) with inferences on chromosome evolution
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DOI：
10.1080/00087114.2001.10589210
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发表时间：
2001-01-01
期刊：
影响因子：
2.1
通讯作者：
Almeida-Toledo, LF
中科院分区：
文献类型：
--
作者：
Fernandes-Matioli, FMC;Almeida-Toledo, LF
利用线粒体基因ND2的345个核苷酸序列对产于巴西东南部巴拉那河上游水系的4种裸腹鱼进行了系统发育分析，这4种裸腹鱼分别是：Carapo、G.pantherinus、G.inaequilabiatus和G.提出了一个系统发育图，其中G，pantherinus是该类群中最基本的谱系。Carapo和G、Sylvius品系的年龄呈现最新的分化；Inaequilabiatus是与Carapo和G.Sylvius关系最近的姐妹群。在利用序列数据重建的系统发育树的基础上，提出了这组FISH中染色体进化的新假说。在对用于物种系统发育推断的核型数据进行评估后，我们认为核型数据对系统发育和染色体进化研究的早期步骤是有用的，并且分子和核学方法的结合可以改进假说的形成。
A phylogenetic analysis using 345 nucleotides sequenced from the mitochondrial gene ND2 was carried out in the four Gymnotus species from the Upper-Parana river system, Southeastern Brazil, G. carapo, G. pantherinus, G. inaequilabiatus, and G, sylvius. A phylogeny is proposed in which G, pantherinus is located as the most basal lineage within the group. G. carapo and G, sylvius line ages present the most recent divergence; G. inaequilabiatus is the closest sister group in relation to G. carapo and G. sylvius. New hypotheses of chromosome evolution in this group of fish are proposed based on the phylogenetic tree reconstructed using the sequence data. After an appraisal of karyotype data for species phylogeny inferences, we suggest that karyotype data are useful for the early steps of phylogenetic and chromosome evolution studies, and that the conjugation of molecular and karyological approaches can improve the hypotheses formulation.