Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 129, Issue -, Pages 339-350Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2019.01.200
Keywords
Sinorhodeus microlepis; Acheilognathinae; mtDNA; AT-skew; Phylogeny; Divergence time
Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences, China [XDB3104]
- Earmarked Fund for Modern Agro-industry Technology Research System, China [NYCYTX-49]
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Sinorhodeus microlepis (S. microlepis) is recently described as a new species and represents a new genus Sinorhodeu of the subfamily Acheilognathinae. In this study, we first sequenced the complete mitogenome of S. microlepis and compared with the other 29 bitterling mitogenomes. The S. microlepis mitogenome is 16,591 bp in length and contains 37 genes. Gene distribution pattern is identical among 30 bitterling mitogenomes. A significant linear correlation between A+T% and AT-skew were found among 29 bitterling mitogenomes, except S. microlepis shows unusual AT-skew with slightly negative in tRNAs and PCGs. Bitterling mitogenomes exhibit highly conserved usage bias of start codon, relative synonymous codons and amino acids, overlaps and non-coding intergenic spacers. Phylogenetic trees constructed by 13 PCGs strongly support the polyphyly of the genus Acheilognathus and the paraphyly of Rhodeus and Tanakia. Together with the unusual characters of S. microlepis mitogenomes and phylogenetic trees, S. microtepis should be a sister species to the genus Rhodeu that might diverge about 13.69 Ma (95% HPD: 12.96-14.48 Ma). 2019 Published by Elsevier B.V.
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