Comparative Mitogenomics of the Genus Odontobutis (Perciformes: Gobioidei: Odontobutidae) Revealed Conserved Gene Rearrangement and High Sequence Variations

To understand the molecular evolution of mitochondrial genomes (mitogenomes) in the genus Odontobutis, the mitogenome of Odontobutis yaluensis was sequenced and compared with those of another four Odontobutis species. Our results displayed similar mitogenome features among species in genome organiza...

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Published in:International journal of molecular sciences 2015-10, Vol.16 (10), p.25031-25049
Main Authors: Ma, Zhihong, Yang, Xuefen, Bercsenyi, Miklos, Wu, Junjie, Yu, Yongyao, Wei, Kaijian, Fan, Qixue, Yang, Ruibin
Format: Article
Language:English
Subjects:
Animals
Biodiversity
Codon - genetics
codon usage
Comparative studies
control region
Evolution, Molecular
gene order
Gene Order - genetics
Genes
Genetic Variation - genetics
Genome, Mitochondrial - genetics
Gobioidei
Mitochondria
mitochondrial genome
Molecular biology
Odontobutidae
Odontobutis
Perciformes - classification
Perciformes - genetics
Phylogeny
Tandem Repeat Sequences - genetics
tandem repeats
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Summary:To understand the molecular evolution of mitochondrial genomes (mitogenomes) in the genus Odontobutis, the mitogenome of Odontobutis yaluensis was sequenced and compared with those of another four Odontobutis species. Our results displayed similar mitogenome features among species in genome organization, base composition, codon usage, and gene rearrangement. The identical gene rearrangement of trnS-trnL-trnH tRNA cluster observed in mitogenomes of these five closely related freshwater sleepers suggests that this unique gene order is conserved within Odontobutis. Additionally, the present gene order and the positions of associated intergenic spacers of these Odontobutis mitogenomes indicate that this unusual gene rearrangement results from tandem duplication and random loss of large-scale gene regions. Moreover, these mitogenomes exhibit a high level of sequence variation, mainly due to the differences of corresponding intergenic sequences in gene rearrangement regions and the heterogeneity of tandem repeats in the control regions. Phylogenetic analyses support Odontobutis species with shared gene rearrangement forming a monophyletic group, and the interspecific phylogenetic relationships are associated with structural differences among their mitogenomes. The present study contributes to understanding the evolutionary patterns of Odontobutidae species.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms161025031