The complete mitochondrial genome sequence of the Xizang Plateau frog, Nanorana parkeri (Anura: Dicroglossidae)

Abstract

The Xizang Plateau frog (Nanorana parkeri) belongs to the family Dicroglossidae, which distributes in southern and eastern Xizang, southern-most Qinghai in China, high elevations of north-central Nepal, Himalayan Bhutan, northeastern Kashmir and India. In this study, the complete mitochondrial genome of N. parkeri was sequenced. The mitogenome was 17,837 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA (tRNA) genes, two ribosomal RNA genes, and a non-coding control region (CR). As in other vertebrates, most mitochondrial genes are encoded on the heavy strand, except for ND6 and eight tRNA genes, which are encoded on the light strand. The overall base composition of the N. parkeri is A: 27.7 % A, T: 30.1 % T, C: 26.6% and G: 15.6%. The alignment of the Nanorana species CRs exhibited high genetic variability and rich A + T content. In comparison with the mtDNA sequences typical of vertebrates, a tandem duplication of the tRNAMet gene and a rearrangement of the tRNAThr, tRNAPro and tRNALeu (CUN) genes were found. The complete mitogenome of N. parkeri can provided an important data for the studies on phylogenetic relationship and population genetics to further explore the taxonomic status of this species.