The complete mitochondrial genome of a marine mussel, <i>Modiolus comptus</i> (Mollusca: Mytilidae), and its phylogenetic implication

Abstract

In this study, the complete mitochondrial genome of <i>Modiolus comptus</i> was determined and annotated for the first time. The 15,591 bp circular genome has a base composition of 24.3% A, 38.6% T, 12.5% C, and 24.5% G, demonstrating a bias of higher AT content (63.0%) than GC content (27.0%). The mitochondrial genome contains 12 protein-coding genes (PCGs), 20 transfer RNA genes (tRNA), 2 ribosomal RNA genes (<i>12S rRNA</i> and <i>16S rRNA</i>), and one control region. All genes of <i>M. comptus</i> were encoded on the heavy strand, except trnT(ugu) gene. The whole mitochondrial genome of <i>M. comptus</i> and 21 mitogenomes of other Mytilidae species were used for phylogenetic analysis. The result indicated the newly sequenced species had the closest relationship with <i>Modiolus nipponicus</i> (MK721547) and was clustered within the clade of genus <i>Modiolus</i>.