Reference - Detail
| RRC ID | 85295 |
|---|---|
| Author | Sun S, Li S, Seim I, Du X, Yang X, Liu K, Wei Z, Shao C, Fan G, Liu X. |
| Title | Complete mitogenomes reveal high diversity and recent population dynamics in Antarctic krill. |
| Journal | BMC Genomics |
| Abstract |
BACKGROUND:The Antarctic krill (Euphausia superba) is a keystone species in the Southern Ocean ecosystem, influencing food web dynamics and ecosystem functionality. Despite its ecological importance, further exploration is essential to understand their population dynamics. RESULTS:In this study, we present the complete mitogenome of the Antarctic krill. The assembly is 18,926 bp, including a notably large 3,952 bp control region (CR). The CR features a satellite repeat spanning 2,289 bp, showcasing the effectiveness of long-read sequencing in resolving complex genomic regions. Additionally, we identified 900 nuclear-mitochondrial segments (NUMTs) totaling 2.79 Mb, shedding light on the dynamic integration of mitochondrial DNA (mtDNA) into the nuclear genomes. By establishing a dataset comprising 80 krill mitogenomes, we unveil substantial mitochondrial diversity, particularly within the ND4 gene. While our analysis reveals no significant differentiation among four geographically distinct groups, we identify at least four maternal genetic clusters. Haplotype network analysis and demographic reconstructions suggest a recent population expansion, likely driven by favorable environmental conditions during the late Pleistocene. Furthermore, our investigation into selection pressures on mitochondrial genes reveals evidence of purifying selection across all 13 protein-coding genes, underscoring the pivotal role of mtDNA conservation in maintaining mitochondrial function under extreme environments. CONCLUSIONS:This study provides a repository of Antarctic krill mitogenomes and insights into the population genetics and evolutionary history of this ecologically important species from a mitogenomic perspective, with implications for krill conservation and management in the Southern Ocean. |
| Volume | 26(1) |
| Pages | 419 |
| Published | 2025-4-29 |
| DOI | 10.1186/s12864-025-11579-w |
| PII | 10.1186/s12864-025-11579-w |
| Description | NIES data were referenced. |
| PMID | 40301719 |
| PMC | PMC12039093 |
| MeSH | Animals Antarctic Regions DNA, Mitochondrial / genetics Euphausiacea* / classification Euphausiacea* / genetics Genetic Variation* Genome, Mitochondrial* Haplotypes Phylogeny Population Dynamics |
| IF | 3.594 |
| Resource | |
| GBIF | Marine Invertebrata specimen database of Osaka Museum of Natutal History Fish monitoring data in Lake Kasumigaura Gunma Museum of Natural History, Crustacea Specimens Crustacea Collection of Natural History Museum and Institute, Chiba Marine specimens of Misaki Marine Biological Station, Graduate School of Science, The University of Tokyo Ibaraki Nature Museum, Arthropoda collection Benthos collection of the Museum of Nature and Human Activities, Hyogo Arthropoda (excepting insect) collection of Osaka Museum of Natural History Arthropod specimens of Natural History Museum, Kishiwada City Zoological specimens of Gifu Prefectural Museum Crustacean collection of the National Museum of Nature and Science Crustacean specimen database of Kanagawa Prefectural Museum of Natural History Nagoya-CR Invertebrate specimens in the Wakayama Prefectural Museum of Natural History, Japan. Crustacea specimens of Ryukyu University Museum (Fujukan) Crustacean specimens of Kitakyushu Museum of Natural History & Human History Crustacean specimens of Kaizuka City Museum of Natural History |