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CC BY-NC-ND V4.0, Open Access
Journal article
The enormous repetitive Antarctic krill genome reveals environmental adaptations and population insights
Cell, Vol.186(6), pp.1279-1294.e19
2023
PMID: 36868220
Abstract
Antarctic krill (Euphausia superba) is Earth’s most abundant wild animal, and its enormous biomass is vital to the Southern Ocean ecosystem. Here, we report a 48.01-Gb chromosome-level Antarctic krill genome, whose large genome size appears to have resulted from inter-genic transposable element expansions. Our assembly reveals the molecular architecture of the Antarctic krill circadian clock and uncovers expanded gene families associated with molting and energy metabolism, providing insights into adaptations to the cold and highly seasonal Antarctic environment. Population-level genome re-sequencing from four geographical sites around the Antarctic continent reveals no clear population structure but highlights natural selection associated with environmental variables. An apparent drastic reduction in krill population size 10 mya and a subsequent rebound 100 thousand years ago coincides with climate change events. Our findings uncover the genomic basis of Antarctic krill adaptations to the Southern Ocean and provide valuable resources for future Antarctic research.
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•Assembly of the 48.01 Gb chromosome-level Antarctic krill genome•Extensive repeat expansions contributed to the giant Antarctic krill genome•Genetic adaptations to extreme variability of the Antarctic environment•Population analysis reveals no clear geographic differentiation in Antarctic krill
The giant and highly repetitive Antarctic krill genome reveals environmental adaptations and population dynamics of Earth’s most abundant wild animal.
Details
- Title
- The enormous repetitive Antarctic krill genome reveals environmental adaptations and population insights
- Authors/Creators
- Changwei Shao - Chinese Academy of Fishery SciencesShuai Sun - BGI (United States)Kaiqiang Liu - Chinese Academy of Fishery SciencesJiahao Wang - BGI (United States)Shuo Li - Chinese Academy of Fishery SciencesQun Liu - BGI (United States)Bruce E. Deagle - Commonwealth Scientific and Industrial Research OrganisationInge Seim - Nanjing Normal UniversityAlberto Biscontin - Department of Biology, University of Padova, Padova 35121, ItalyQian Wang - Chinese Academy of Fishery SciencesXin Liu - BGI (United States)So Kawaguchi - Australian Antarctic DivisionYalin Liu - BGI (United States)Simon Jarman - Curtin UniversityYue Wang - BGI (United States)Hong-Yan Wang - Chinese Academy of Fishery SciencesGuodong Huang - BGI (United States)Jiang Hu - Nextomics Biosciences (China)Bo Feng - Chinese Academy of Fishery SciencesCristiano De Pittà - Department of Biology, University of Padova, Padova 35121, ItalyShanshan Liu - BGI (United States)Rui Wang - National Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, Shandong 266071, ChinaKailong Ma - BGI (United States)Yiping Ying - Ministry of Agriculture and Rural AffairsGabrielle Sales - Department of Biology, University of Padova, Padova 35121, ItalyTao Sun - BGI (United States)Xinliang Wang - Ministry of Agriculture and Rural AffairsYaolei Zhang - BGI (United States)Yunxia Zhao - Ministry of Agriculture and Rural AffairsShanshan Pan - BGI (United States)Xiancai Hao - Chinese Academy of Fishery SciencesYang Wang - BGI-Shenzhen, Shenzhen, Guangdong 518083, ChinaJiakun Xu - Chinese Academy of Fishery SciencesBowen Yue - Chinese Academy of Fishery SciencesYanxu Sun - Chinese Academy of Fishery SciencesHe Zhang - BGI (United States)Mengyang Xu - BGI (United States)Yuyan Liu - Chinese Academy of Fishery SciencesXiaodong Jia - Liaocheng People's HospitalJiancheng Zhu - Ministry of Agriculture and Rural AffairsShufang Liu - Chinese Academy of Fishery SciencesJue Ruan - Genomics (United Kingdom)Guojie Zhang - BGI (United States)Huanming Yang - BGI (United States)Xun Xu - BGI (United States)Jun Wang - BGI-Qingdao, BGI-Shenzhen, Qingdao, Shandong 266555, ChinaXianyong Zhao - Chinese Academy of Fishery SciencesBettina Meyer - Polar (Finland)Guangyi Fan - BGI (United States)
- Publication Details
- Cell, Vol.186(6), pp.1279-1294.e19
- Publisher
- Elsevier Inc
- Identifiers
- 991005599568307891
- Copyright
- © 2023 The Author(s).
- Murdoch Affiliation
- Centre for Crop and Food Innovation; State Agricultural Biotechnology Centre
- Language
- English
- Resource Type
- Journal article
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