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Abstract
Paramisgurnus dabryanus Sauvage (Cobitidae, Cypriniformes) is a native large-scale loach widely distributed in main inland freshwater systems of China. The complete mitochondrial genome sequence of P. dabryanus from the Yellow River (YR) estuary was characterized in the present study. The circular mitogenome is 16 570 bp in size and contains two ribosomal RNA genes, 22 transfer RNA genes, and 13 protein-coding genes. The overall A + T content is 56.64% in the range of other Cobitidae studied. The mitogenome of P. dabryanus YR has an overall nucleotide sequence identity of 96.9% with that from Zhejiang, and 89.2% with that from Hubei. All the Misgurnus and Paramisgurnus species were clustered into two Misgurnus/Paramisgurnus complex clades with high bootstrap values based on the whole mitogenome sequences. The mitochondrial phylogenomic analysis indicates that the relationships in Cobitidae are inconsistent with the current classification system and taxonomic revision is required on the basis of molecular phylogeny and morphology.
Declaration of interest
This investigation was supported by the Jiangsu Agriculture Science and Technology Innovation Fund (No. CX-13-2041), the Jiangsu Agriculture Science and Technology Support Project (No. BE2014335), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the National Natural Science Foundation of China (No. 41206146), the Scientific Research Foundation for Outstanding Young Scientists of Shandong Province (No. BS2013HZ004), the Special Fund of the membership of Youth Innovation Promotion Association, Chinese Academy of Sciences (No. 2015164), and the Open-end Funds of Jiangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology (No. 2014HS002). The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this paper.