Evolutionary relatedness of mackerels of the genus Scomber based on complete mitochondrial genomes: Strong support to the recognition of Atlantic Scomber colias and Pacific Scomber japonicus as distinct species
Evolutionary relatedness of mackerels of the genus Scomber based on complete mitochondrial genomes: Strong support to the recognition of Atlantic Scomber colias and Pacific Scomber japonicus as distinct species
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DOI：
10.1016/j.gene.2009.12.004
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发表时间：
2010-02-15
期刊：
影响因子：
3.5
通讯作者：
Infante, Carlos
中科院分区：
文献类型：
--
作者：
Catanese, Gaetano;Manchado, Manuel;Infante, Carlos
鲭鱼属的鲭鱼是商业上重要的物种，但它们的分类地位仍有争议。虽然以前的系统发育数据支持大西洋鲭和太平洋鲭作为独立的物种，它只是基于部分线粒体和核DNA序列的分析。为了阐明这一相关问题，我们测定了S. colias，S.澳大利亚鲭Scomber australasicus。S. colias和S.和S.澳大利亚人所有的有丝分裂基因组的基因内容（13蛋白编码，2 rRNA，和22 tRNA）和组织类似于在鲭和大多数其他脊椎动物中观察到的。主要非编码区（控制区）的长度范围为865和866 bp之间，并显示出典型的保守区块。系统发育分析显示，一个单系起源的鲭鱼物种相对于其他鲭。本研究的主要发现是S. colias和S.在鲭鱼集群中，它们被显著地分组在不同的谱系中，这在遗传学上构成了它们可以被认为是独立物种的证据。此外，这里提出的分子数据提供了一个有用的工具，进化以及群体遗传学研究。(C)2009爱思唯尔有限公司版权所有。
Mackerels of the genus Scomber are commercially important species, but their taxonomic status is still controversial. Although previous phylogenetic data support the recognition of Atlantic Scomber colias and Pacific Scomber japonicus as separate species, it is only based on the analysis of partial mitochondrial and nuclear DNA sequences. In an attempt to shed light on this relevant issue, we have determined the complete mitochondrial DNA sequence of S. colias, S. japonicus, and Scomber australasicus. The total length of the mitogenomes was 16,568 bp for S. colias and 16,570 bp for both S. japonicus and S. australosicus. All mitogenomes had a gene content (13 protein-coding, 2 rRNAs, and 22 tRNAs) and organization similar to that observed in Scomber scombrus and most other vertebrates. The major noncoding region (control region) ranged between 865 and 866 bp in length and showed the typical conserved blocks. Phylogenetic analyses revealed a monophyletic origin of Scomber species with regard to other scombrid fish. The major finding of this study is that S. colias and S. japonicus were significantly grouped in distinct lineages within Scomber cluster, which phylogenetically constitutes evidence that they may be considered as separate species. Additionally, molecular data here presented provide a useful tool for evolutionary as well as population genetic studies. (C) 2009 Elsevier B.V. All rights reserved.