Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth

Abstract Understanding the genetic basis of adaptation is one of the main enigmas of evolutionary biology. Among vertebrates, hemoglobin has been well documented as a key trait for adaptation to different environments. Here, we investigate the role of hemoglobins in adaptation to ocean depth in the...

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Autores principales:	Helle Tessand Baalsrud, Kjetil Lysne Voje, Ole Kristian Tørresen, Monica Hongrø Solbakken, Michael Matschiner, Martin Malmstrøm, Reinhold Hanel, Walter Salzburger, Kjetill S. Jakobsen, Sissel Jentoft
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bc993e39c5914058b5e160d27b7e1c9c
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spelling	oai:doaj.org-article:bc993e39c5914058b5e160d27b7e1c9c2021-12-02T12:31:51ZEvolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth10.1038/s41598-017-08286-22045-2322https://doaj.org/article/bc993e39c5914058b5e160d27b7e1c9c2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08286-2https://doaj.org/toc/2045-2322Abstract Understanding the genetic basis of adaptation is one of the main enigmas of evolutionary biology. Among vertebrates, hemoglobin has been well documented as a key trait for adaptation to different environments. Here, we investigate the role of hemoglobins in adaptation to ocean depth in the diverse teleost order Gadiformes, with species distributed at a wide range of depths varying in temperature, hydrostatic pressure and oxygen levels. Using genomic data we characterized the full hemoglobin (Hb) gene repertoire for subset of species within this lineage. We discovered a correlation between expanded numbers of Hb genes and ocean depth, with the highest numbers in species occupying shallower, epipelagic regions. Moreover, we demonstrate that the Hb genes have functionally diverged through diversifying selection. Our results suggest that the more variable environment in shallower water has led to selection for a larger Hb gene repertoire and that Hbs have a key role in adaptive processes in marine environments.Helle Tessand BaalsrudKjetil Lysne VojeOle Kristian TørresenMonica Hongrø SolbakkenMichael MatschinerMartin MalmstrømReinhold HanelWalter SalzburgerKjetill S. JakobsenSissel JentoftNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Helle Tessand Baalsrud Kjetil Lysne Voje Ole Kristian Tørresen Monica Hongrø Solbakken Michael Matschiner Martin Malmstrøm Reinhold Hanel Walter Salzburger Kjetill S. Jakobsen Sissel Jentoft Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
description	Abstract Understanding the genetic basis of adaptation is one of the main enigmas of evolutionary biology. Among vertebrates, hemoglobin has been well documented as a key trait for adaptation to different environments. Here, we investigate the role of hemoglobins in adaptation to ocean depth in the diverse teleost order Gadiformes, with species distributed at a wide range of depths varying in temperature, hydrostatic pressure and oxygen levels. Using genomic data we characterized the full hemoglobin (Hb) gene repertoire for subset of species within this lineage. We discovered a correlation between expanded numbers of Hb genes and ocean depth, with the highest numbers in species occupying shallower, epipelagic regions. Moreover, we demonstrate that the Hb genes have functionally diverged through diversifying selection. Our results suggest that the more variable environment in shallower water has led to selection for a larger Hb gene repertoire and that Hbs have a key role in adaptive processes in marine environments.
format	article
author	Helle Tessand Baalsrud Kjetil Lysne Voje Ole Kristian Tørresen Monica Hongrø Solbakken Michael Matschiner Martin Malmstrøm Reinhold Hanel Walter Salzburger Kjetill S. Jakobsen Sissel Jentoft
author_facet	Helle Tessand Baalsrud Kjetil Lysne Voje Ole Kristian Tørresen Monica Hongrø Solbakken Michael Matschiner Martin Malmstrøm Reinhold Hanel Walter Salzburger Kjetill S. Jakobsen Sissel Jentoft
author_sort	Helle Tessand Baalsrud
title	Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
title_short	Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
title_full	Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
title_fullStr	Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
title_full_unstemmed	Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth
title_sort	evolution of hemoglobin genes in codfishes influenced by ocean depth
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/bc993e39c5914058b5e160d27b7e1c9c
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Evolution of Hemoglobin Genes in Codfishes Influenced by Ocean Depth

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