The complete mitochondrial genome of Hemigrammus bleheri (Characiformes: Hemigrammus) and phylogenetic studies of Characiformes

Abstract

Complete mitochondrial genome of the characiform fish Hemigrammus bleheri was characterized in the present study. The whole mitogenome was 17,021 bp in size and consisted of 13 protein-coding genes (PCGs), 22 tRNAs, 2 rRNAs genes, a control region, and origin of light-strand replication. The proportion of coding sequences with a total length of 11,415 bp is 67.06%, which encodes 3805 amino acids. Similar to other Hemigrammus species, the base composition of H. bleheri was 29.30% for A, 25.26% for C, 16.36% for G, and 29.08% for T. All PCGs started with Met. ND1, ND3, ND4L, ND6, and CytB ended with TAA as the stop codon. ND2, ATP8, and ND5 ended with TAG as a stop codon, CO2, ATP6, CO3, and ND4 ended simply by T, and CO1 ended by a single AGG. The lengths of 12S ribosomal RNA and 16S ribosomal RNA were 924 bp and 1681 bp, respectively. The length of control region (D-loop) was 1308 bp, ranging from 15,714 to 17,021 bp. The complete mitochondrial genome sequence provided here would be helpful in further understanding the evolution of characiformes and conservation genetics of H. bleheri.

Keywords

• hemigrammus bleheri
• mitochondrial genome
• evolutionary relationships