Complete mitochondrial genome of Ptychobarbus kaznakovi (Teleostei: Cypriniformes: Cyprinidae), and repetitive sequences in the D-loop

Abstract

The complete mitochondrial DNA genome of Ptychobarbus kaznakovi was sequenced and characterized. The genome is 16,842 bp in length. Similar with most teleosts, it has two ribosomal RNA (rRNA) genes, 13 protein-coding genes, 22 transfer RNA (tRNA) genes, and one displacement loop (D-loop) region. Conserved sequence blocks, including ETAS, CSB-B, D, E, F, and CSB1-3, were identified in the D-loop, which is similar to other species in Cypriniformes. Nevertheless, a 55 bp tandem repeat array was also identified at 3′ end of the D-loop, which is the first finding in Schizothoracinae. Phylogenetic analysis showed that the species of Ptychobarbus (P. dipogon and P. kaznakovi) formed a monophyletic group and represented close relationship to the species without scales in Schizothoracinae.

• D-loop
• mitochondrial genome
• phylogeny
• Ptychobarbus kaznakovi
• tandem repeat

Acknowledgements

We would like to thank Pengfei Yan for his help in the experiment.

Declaration of interest

The authors report no conflict of interest. The authors alone are responsible for the content and writing of the paper. The work was supported by the Program for New Century Excellent Talents in University (No. NCET-11-0347).