Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill
Genetic variation is instrumental for adaptation to changing environments but it is unclear how it is structured and contributes to adaptation in pelagic species lacking clear barriers to gene flow. Here, we applied comparative genomics to extensive transcriptome datasets from 20 krill species colle...
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ftpubmed:oai:pubmedcentral.nih.gov:10642690 2023-12-17T10:22:20+01:00 Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill Choquet, Marvin Lenner, Felix Cocco, Arianna Toullec, Gaëlle Corre, Erwan Toullec, Jean-Yves Wallberg, Andreas 2023-10-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642690/ http://www.ncbi.nlm.nih.gov/pubmed/37816123 https://doi.org/10.1093/molbev/msad225 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642690/ http://www.ncbi.nlm.nih.gov/pubmed/37816123 http://dx.doi.org/10.1093/molbev/msad225 © The Author(s) 2023. Published by Oxford University Press on behalf of Society for Molecular Biology and Evolution. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com Mol Biol Evol Discoveries Text 2023 ftpubmed https://doi.org/10.1093/molbev/msad225 2023-11-19T01:53:49Z Genetic variation is instrumental for adaptation to changing environments but it is unclear how it is structured and contributes to adaptation in pelagic species lacking clear barriers to gene flow. Here, we applied comparative genomics to extensive transcriptome datasets from 20 krill species collected across the Atlantic, Indian, Pacific, and Southern Oceans. We compared genetic variation both within and between species to elucidate their evolutionary history and genomic bases of adaptation. We resolved phylogenetic interrelationships and uncovered genomic evidence to elevate the cryptic Euphausia similis var. armata into species. Levels of genetic variation and rates of adaptive protein evolution vary widely. Species endemic to the cold Southern Ocean, such as the Antarctic krill Euphausia superba, showed less genetic variation and lower evolutionary rates than other species. This could suggest a low adaptive potential to rapid climate change. We uncovered hundreds of candidate genes with signatures of adaptive evolution among Antarctic Euphausia but did not observe strong evidence of adaptive convergence with the predominantly Arctic Thysanoessa. We instead identified candidates for cold-adaptation that have also been detected in Antarctic fish, including genes that govern thermal reception such as TrpA1. Our results suggest parallel genetic responses to similar selection pressures across Antarctic taxa and provide new insights into the adaptive potential of important zooplankton already affected by climate change. Text Antarc* Antarctic Antarctic Krill Arctic Climate change Euphausia superba Southern Ocean Zooplankton PubMed Central (PMC) Antarctic Arctic Indian Pacific Southern Ocean The Antarctic Molecular Biology and Evolution 40 11 |
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Discoveries Choquet, Marvin Lenner, Felix Cocco, Arianna Toullec, Gaëlle Corre, Erwan Toullec, Jean-Yves Wallberg, Andreas Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
topic_facet |
Discoveries |
description |
Genetic variation is instrumental for adaptation to changing environments but it is unclear how it is structured and contributes to adaptation in pelagic species lacking clear barriers to gene flow. Here, we applied comparative genomics to extensive transcriptome datasets from 20 krill species collected across the Atlantic, Indian, Pacific, and Southern Oceans. We compared genetic variation both within and between species to elucidate their evolutionary history and genomic bases of adaptation. We resolved phylogenetic interrelationships and uncovered genomic evidence to elevate the cryptic Euphausia similis var. armata into species. Levels of genetic variation and rates of adaptive protein evolution vary widely. Species endemic to the cold Southern Ocean, such as the Antarctic krill Euphausia superba, showed less genetic variation and lower evolutionary rates than other species. This could suggest a low adaptive potential to rapid climate change. We uncovered hundreds of candidate genes with signatures of adaptive evolution among Antarctic Euphausia but did not observe strong evidence of adaptive convergence with the predominantly Arctic Thysanoessa. We instead identified candidates for cold-adaptation that have also been detected in Antarctic fish, including genes that govern thermal reception such as TrpA1. Our results suggest parallel genetic responses to similar selection pressures across Antarctic taxa and provide new insights into the adaptive potential of important zooplankton already affected by climate change. |
format |
Text |
author |
Choquet, Marvin Lenner, Felix Cocco, Arianna Toullec, Gaëlle Corre, Erwan Toullec, Jean-Yves Wallberg, Andreas |
author_facet |
Choquet, Marvin Lenner, Felix Cocco, Arianna Toullec, Gaëlle Corre, Erwan Toullec, Jean-Yves Wallberg, Andreas |
author_sort |
Choquet, Marvin |
title |
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
title_short |
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
title_full |
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
title_fullStr |
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
title_full_unstemmed |
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill |
title_sort |
comparative population transcriptomics provide new insight into the evolutionary history and adaptive potential of world ocean krill |
publisher |
Oxford University Press |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642690/ http://www.ncbi.nlm.nih.gov/pubmed/37816123 https://doi.org/10.1093/molbev/msad225 |
geographic |
Antarctic Arctic Indian Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Arctic Indian Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Arctic Climate change Euphausia superba Southern Ocean Zooplankton |
genre_facet |
Antarc* Antarctic Antarctic Krill Arctic Climate change Euphausia superba Southern Ocean Zooplankton |
op_source |
Mol Biol Evol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642690/ http://www.ncbi.nlm.nih.gov/pubmed/37816123 http://dx.doi.org/10.1093/molbev/msad225 |
op_rights |
© The Author(s) 2023. Published by Oxford University Press on behalf of Society for Molecular Biology and Evolution. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
op_doi |
https://doi.org/10.1093/molbev/msad225 |
container_title |
Molecular Biology and Evolution |
container_volume |
40 |
container_issue |
11 |
_version_ |
1785546700406915072 |