Complete F-type mitochondrial genome of freshwater mussels Unio douglasiae

Abstract

The complete F-type mitochondrial genome of Unio douglasiae is reported for the first time in this research. It is 15,767 bp in size and contains 13 protein-coding genes, 22 tRNA genes, and 2 rRNA genes. Except for COI, ND2, CYTB, ND1, ND6, ND4L, ATP8 with ATA start codon, and ND4 with ATT start codon, the remaining protein-coding genes initiate with the orthodox ATG start codon. There are 25 noncoding regions found throughout the mitogenome of Unio douglasiae, ranging in the size from 1 to 312 bp, the largest of which is between tRNA^Glu and ND2 (312 bp).

Keywords:

• F-type mitogenome
• noncoding region
• start codon
• Unio douglasiae

Declaration of interest

This study was supported by the National Natural Science Foundation of China (31101939), Innovation Program of Shanghai Municipal Education Commission (13ZZ128), and Shanghai University Knowledge Service Platform, Shanghai Ocean University Aquatic Animal Breeding Center (ZF1206).The authors report no conflict of interest. The authors alone are responsible for the content and writing of the paper.