Complete maternal mitochondrial genome of freshwater mussel Aculamprotula tientsinensis (Bivalvia: Unionidae: Unioninae)

Abstract

Aculamprotula tientsinensis is a rare and endemic species of freshwater mussel in China. This study firstly determined the complete F-type mitochondrial genome of A. tientsinensis. The circle genome (15 695 bp) comprises 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, 1 FORF gene. Except for cob, nad5 and nad6, the remaining protein-coding genes initiate with the orthodox start codon (ATG, ATA, ATT). There are 26 non-coding regions in the mitogenome of A. tientsinensis, ranging in size from 1 to 229 bp. The base composition of the genome is A (37.83%), G (12.69%), T (25.43%) and C (24.06%). Gene order is identical to other female species of Unionidae but for Gonideinae. The phylogenetic analyses of Unionidae indicate that A. tientsinensis is closely related to A. tortuosa and A. coreana, which belong to Unioninae. The complete mitogenome can deepen comparative and evolutionary genomics of Unionidae and be more comprehensive to parse the genetic relationship between the species and the ownership beyond species.

Keywords:

• Aculamprotula
• freshwater mussel F-type mitogenome
• start codon

Declaration of interest

This work is supported by grants from the National Natural Science Foundation of China (No. 31260515), Leading talent training plan of the GanPo Outstanding Talents 555 Project (18000041) and Jiangxi Province Natural Science Foundation (20142BAB214016). The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.