Complete mitochondrial genome characterization of Cirrhinus mrigala from the Three Gorges Reservoir in China

Abstract

Cirrhinus mrigala is a fish introduced from India to the south China in 1980s, and a large number of this species is found in the Three Gorges Reservoir of the upper Yangtze River now, which might pose a great threat to the indigenous fish. In this study, we sequenced and characterized the complete mitochondrial genome of C. mrigala from the Three Gorges Reservoir. The complete mitochondrial genome was 16,595 bp in length and contained 13 protein-coding genes (PCGs), two ribosomal RNA genes (12S rRNA and 16S rRNA), 22 transfer RNA genes (tRNA) and one non-coding control region (D-loop). The overall nucleotide composition was 32.05% (A), 24.48% (T), 15.49% (G) and 27.98% (C). The phylogenetic tree indicated that C. mrigala was related to Sinilabeo rendahli, Abbottina rivularis and Pseudogyrinocheilus prochilus. The results can provide basic genetic information for subsequent population genetic and phylogenetic researches, which will be helpful for understanding the genetic resource dynamic of C. mrigala in areas outside of its native distribution.