In this study, the complete mitochondrial genome of Ochetobius elongatus was first sequenced and annotated. The entire mitogenome is 16 613 bp in length and has a typical vertebrate mitochondrial genetic trait, consisting of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes and a control region. The overall nucleotide composition of O. elongatus mt genome is A: 30.96%, T: 25.38%, G: 16.26% and C: 27.40%, with the A + T content of 56.34%, showing an obvious anti-G bias. Phylogenetic analyses suggest that Leuciscinae formed a clade first and then clustered with Cultrinae. The complete mitochondrial genome of O. elongatus will benefit to a better understanding of population genetics, molecular systematics and stock evaluation, further serving the germplasm resources conservation and management of O. elongatus.
Keywords: Leuciscinae; Ochetobius elongatus; mitochondrial genome.