Indel variation in the mitochondrial ND5 region supports monophyly of the tribe Hippoglossoidini (sensu Vinnikov et al. 2018) within the family Pleuronectidae

IF 0.6 4区 生物学 Q4 FISHERIES
Hiroaki Kurihara, Shigeru M. Shirai, Kunihiro Fujiwara, Minoru Ikeda
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引用次数: 0

Abstract

Indel (insertion–deletion) events observed in the genome represent irreversible mutational processes, making indel regions crucial characteristics for discussing phylogenetic relationships. The tribe Hippoglossoidini is a recently proposed taxonomic group based on the molecular phylogenetic analyses of both mitochondrial (mt) and nuclear DNA sequences. However, no synapomorphic characteristics have been identified within this tribe, either morphologically or molecularly. In the present study, we sequenced the ND5 region of mtDNA in the righteye flounder species and conducted interspecific comparisons. We found a 12 bp indel immediately upstream of the stop codon in the ND5 region. A comparative analysis of this region with outgroup species from the Paralichthyidae revealed that the indel was a unique insertion shared by the common ancestor of the Hippoglossoidini species, providing irreversible evidence to support the monophyly of this taxonomic group (synapomorphic characters).

Abstract Image

线粒体ND5区的Indel变异支持褶皱鱼科中的Hippoglossoidini族(sensu Vinnikov等人,2018年)的单系性
在基因组中观察到的吲哚(插入-缺失)事件代表了不可逆的突变过程,使得吲哚区域成为讨论系统发育关系的关键特征。基于线粒体(mt)和核 DNA 序列的分子系统学分析,最近提出了一个分类学上的族群--Hippoglossoidini。然而,无论是在形态学上还是在分子学上,该族都没有发现任何同形特征。在本研究中,我们对右眼鲽种的 mtDNA ND5 区域进行了测序,并进行了种间比较。我们在 ND5 区域的终止密码子上游发现了一个 12 bp 的滞后点。将该区域与副鳞鱼科的外群物种进行比较分析后发现,该嵌合体是河马属物种共同祖先的独特插入物,为支持该分类群的单系化(同形特征)提供了不可逆转的证据。
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来源期刊
Ichthyological Research
Ichthyological Research 生物-动物学
CiteScore
2.80
自引率
16.70%
发文量
48
审稿时长
3 months
期刊介绍: Ichthyological Research is an official journal of the Ichthyological Society of Japan and is published quarterly in January, April, July, and November. Ichthyological Research primarily publishes research papers on original work, either descriptive or experimental, that advances the understanding of the diversity of fishes. Ichthyological Research strives to cover all aspects of fish biology, including taxonomy, systematics, evolution, biogeography, ecology, ethology, genetics, morphology, and physiology.
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