Abstract

The complete mitochondrial genome of the koi carp (Cyprinus carpio, Cyprinidae) was sequenced in the present study by using Ion Torrent Personal Genome Machine (PGM) platform for the first time. The mitochondrial genome sequence is 16 581 bp in size and consists of 13 protein-coding genes, 22 tRNA genes, two rRNA genes and one control region. The gene order and organization were similar to most of the other teleost. The nucleotide compositions of the light strand are 24.82% of A, 31.92% of T, 27.53% of G and 15.73% of C. With the exception of eight tRNA genes and the NADH dehydrogenase subunit 6 (ND6), all other mitochondrial genes are encoded on the heavy strand. The phylogenetic tree constructed using a maximum-likelihood model showed sister relationship of koi carp to other Cyprinidae fishes.

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