The Complete Mitochondrial Genome of Capitulum mitella with Characterization and Phylogenetic Implications

This study aimed to provide new insights into the mitogenomic data of the intertidal coastal ecosystem species Capitulum mitella from China. The mitochondrial genome of C. mitella was sequenced and compared with other available sequences in the NCBI database to improve the current knowledge of its basic genomics data for future phylogenetic studies. The complete mitogenome of C. mitella from China was 14 915 bp long and encoded 37 genes, including 13 PCGs, two rRNAs, 22 tRNAs, and a control region. A detailed comparison was made with the five available complete mitogenomes of C. mitella. Phylogenetic analyses based on neighbor-joining (NJ) trees were carried out, with 12 species from five families chosen. The results showed that all C. mitella was in the same clade. Additionally, sliding window analyses estimated the sequence diversity for each independent PCG, and genetic distances based on the whole genome were estimated. The research presented here provides essential genomic data for the species of C. mitella and can help future investigations on its phylogenetic history and evolution.