Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland
The ice cod Arctogadus glacialis (Peters, 1872) is one of the few fish species endemic to the Arctic. With a circumpolar distribution, the species is confined to the fjords and shelves of the Arctic seas. Biological information on A. glacialis is scarce, with genomic information restricted to micros...
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ftpubmed:oai:pubmedcentral.nih.gov:7766978 2023-05-15T14:52:29+02:00 Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland Ghigliotti, Laura Christiansen, Jørgen S. Carlig, Erica Di Blasi, Davide Pisano, Eva 2020-12-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766978/ http://www.ncbi.nlm.nih.gov/pubmed/33352937 https://doi.org/10.3390/genes11121515 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766978/ http://www.ncbi.nlm.nih.gov/pubmed/33352937 http://dx.doi.org/10.3390/genes11121515 © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Genes (Basel) Article Text 2020 ftpubmed https://doi.org/10.3390/genes11121515 2021-01-03T01:55:22Z The ice cod Arctogadus glacialis (Peters, 1872) is one of the few fish species endemic to the Arctic. With a circumpolar distribution, the species is confined to the fjords and shelves of the Arctic seas. Biological information on A. glacialis is scarce, with genomic information restricted to microsatellites. Within the frame of the TUNU-Programme: Arctic Ocean Fishes—Diversity, Adaptation and Conservation, we studied A. glacialis at the chromosomal level to explore fish diversity and evolutionary aspects. The analysis of over 50 individuals from the Northeast Greenland fjords between latitudes 71°09′ N and 76°42′ N revealed a remarkable intraspecific diversity epitomized by chromosome numbers spanning from 28 to 33, the occurrence of putative B chromosomes, and diversified patterns of distribution of heterochromatin and rDNAs. The number of B chromosomes followed a latitudinal gradient from 0–2 in the north to 2–5 in the south. Considering the benthic and rather stationary life history of this species, the observed chromosomal differences might have arisen independently, possibly driven and/or fostered by the dynamics of repetitive sequences, and are being fixed in relatively isolated fjord populations. The resulting latitudinal cline we observe today might have repercussions on the fate of local populations facing the ongoing climate-driven environmental changes. Text Arctic Arctic Ocean Arctogadus glacialis Greenland Tunu PubMed Central (PMC) Arctic Arctic Ocean Greenland Genes 11 12 1515 |
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Article Ghigliotti, Laura Christiansen, Jørgen S. Carlig, Erica Di Blasi, Davide Pisano, Eva Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
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Article |
description |
The ice cod Arctogadus glacialis (Peters, 1872) is one of the few fish species endemic to the Arctic. With a circumpolar distribution, the species is confined to the fjords and shelves of the Arctic seas. Biological information on A. glacialis is scarce, with genomic information restricted to microsatellites. Within the frame of the TUNU-Programme: Arctic Ocean Fishes—Diversity, Adaptation and Conservation, we studied A. glacialis at the chromosomal level to explore fish diversity and evolutionary aspects. The analysis of over 50 individuals from the Northeast Greenland fjords between latitudes 71°09′ N and 76°42′ N revealed a remarkable intraspecific diversity epitomized by chromosome numbers spanning from 28 to 33, the occurrence of putative B chromosomes, and diversified patterns of distribution of heterochromatin and rDNAs. The number of B chromosomes followed a latitudinal gradient from 0–2 in the north to 2–5 in the south. Considering the benthic and rather stationary life history of this species, the observed chromosomal differences might have arisen independently, possibly driven and/or fostered by the dynamics of repetitive sequences, and are being fixed in relatively isolated fjord populations. The resulting latitudinal cline we observe today might have repercussions on the fate of local populations facing the ongoing climate-driven environmental changes. |
format |
Text |
author |
Ghigliotti, Laura Christiansen, Jørgen S. Carlig, Erica Di Blasi, Davide Pisano, Eva |
author_facet |
Ghigliotti, Laura Christiansen, Jørgen S. Carlig, Erica Di Blasi, Davide Pisano, Eva |
author_sort |
Ghigliotti, Laura |
title |
Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
title_short |
Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
title_full |
Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
title_fullStr |
Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
title_full_unstemmed |
Latitudinal Cline in Chromosome Numbers of Ice Cod A. glacialis (Gadidae) from Northeast Greenland |
title_sort |
latitudinal cline in chromosome numbers of ice cod a. glacialis (gadidae) from northeast greenland |
publisher |
MDPI |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766978/ http://www.ncbi.nlm.nih.gov/pubmed/33352937 https://doi.org/10.3390/genes11121515 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Arctogadus glacialis Greenland Tunu |
genre_facet |
Arctic Arctic Ocean Arctogadus glacialis Greenland Tunu |
op_source |
Genes (Basel) |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7766978/ http://www.ncbi.nlm.nih.gov/pubmed/33352937 http://dx.doi.org/10.3390/genes11121515 |
op_rights |
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/genes11121515 |
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Genes |
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11 |
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12 |
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1515 |
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