Molecular phylogeny of Loliginidae inferred from mitochondrial DNA sequence variation

Abstract

Loliginidae includes many economically important species in trophic systems worldwide. Here, we investigated genetic relationships and diversity in this family. Sequence comparisons and phylogenetic analyses revealed considerable variations between mitochondrial 16 S rRNA gene and cytochrome coxidase subunit I gene among nine Loliginid species. We identified three similar non-coding regions in eight Loliginid species, but not in Sepioteuthislessoniana. We detected a single extended termination-associated sequence and three conserved sequence blocks among these eight species. Our results suggest that Loliginidae forms a major lineage, with S. lessoniana located at the most basal position and forming an individual clade as sister to the remaining species. Loligobeka, Loliolusjaponica, Loliolusuyii, Loligochinensis, Loligoedulis, Loligoduvauceli, Loligobleekeri, and Loligoopalescensare clustered into a monophyletic group. We identified repetitive elements and repeat numbers in the control regions.

Keywords:

• Loliginidae phylogeny; 16S rRNA
• COI
• control region

Acknowledgements

This study was supported by the Zhejiang Provincial Natural Science Foundation of China (LQ16D060003) and the International S&T Cooperation Program of China (2014DFT30120).

Disclosure statement

The authors report no declarations of interest

Additional information

Funding

This study was supported by the Zhejiang Provincial Natural Science Foundation of China (LQ16D060003) and the International S&T Cooperation Program of China (2014DFT30120).