Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback
Evolution of similar phenotypes in independent populations is often taken as evidence of adaptation to the same fitness optimum. However, the genetic architecture of traits might cause evolution to proceed more often toward particular phenotypes, and less often toward others, independently of the ad...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:268482 2023-05-15T16:50:50+02:00 Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback Kimmel, Charles B. Cresko, William A. Phillips, Patrick C. Ullmann, Bonnie Currey, Mark von Hippel, Frank Kristjansson, Bjarni K. Gelmond, Ofer McGuigan, Katrina 2012-02-01 https://espace.library.uq.edu.au/view/UQ:268482 eng eng Wiley-Blackwell Publishing doi:10.1111/j.1558-5646.2011.01441.x issn:0014-3820 issn:1558-5646 orcid:0000-0002-0525-2202 IOS-0618738 Craniofacial G matrix Gasterosteus aculeatus Genetic basis of traits Genetic bias Genetic constraint Microevolution Quantitative genetics 1100 Agricultural and Biological Sciences 1105 Ecology Evolution Behavior and Systematics 1311 Genetics Journal Article 2012 ftunivqespace https://doi.org/10.1111/j.1558-5646.2011.01441.x 2020-08-05T02:10:48Z Evolution of similar phenotypes in independent populations is often taken as evidence of adaptation to the same fitness optimum. However, the genetic architecture of traits might cause evolution to proceed more often toward particular phenotypes, and less often toward others, independently of the adaptive value of the traits. Freshwater populations of Alaskan threespine stickleback have repeatedly evolved the same distinctive opercle shape after divergence from an oceanic ancestor. Here we demonstrate that this pattern of parallel evolution is widespread, distinguishing oceanic and freshwater populations across the Pacific Coast of North America and Iceland. We test whether this parallel evolution reflects genetic bias by estimating the additive genetic variance-covariance matrix (G) of opercle shape in an Alaskan oceanic (putative ancestral) population. We find significant additive genetic variance for opercle shape and that G has the potential to be biasing, because of the existence of regions of phenotypic space with low additive genetic variation. However, evolution did not occur along major eigenvectors of G, rather it occurred repeatedly in the same directions of high evolvability. We conclude that the parallel opercle evolution is most likely due to selection during adaptation to freshwater habitats, rather than due to biasing effects of opercle genetic architecture. Article in Journal/Newspaper Iceland The University of Queensland: UQ eSpace Pacific Evolution 66 2 419 434 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Craniofacial G matrix Gasterosteus aculeatus Genetic basis of traits Genetic bias Genetic constraint Microevolution Quantitative genetics 1100 Agricultural and Biological Sciences 1105 Ecology Evolution Behavior and Systematics 1311 Genetics |
spellingShingle |
Craniofacial G matrix Gasterosteus aculeatus Genetic basis of traits Genetic bias Genetic constraint Microevolution Quantitative genetics 1100 Agricultural and Biological Sciences 1105 Ecology Evolution Behavior and Systematics 1311 Genetics Kimmel, Charles B. Cresko, William A. Phillips, Patrick C. Ullmann, Bonnie Currey, Mark von Hippel, Frank Kristjansson, Bjarni K. Gelmond, Ofer McGuigan, Katrina Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
topic_facet |
Craniofacial G matrix Gasterosteus aculeatus Genetic basis of traits Genetic bias Genetic constraint Microevolution Quantitative genetics 1100 Agricultural and Biological Sciences 1105 Ecology Evolution Behavior and Systematics 1311 Genetics |
description |
Evolution of similar phenotypes in independent populations is often taken as evidence of adaptation to the same fitness optimum. However, the genetic architecture of traits might cause evolution to proceed more often toward particular phenotypes, and less often toward others, independently of the adaptive value of the traits. Freshwater populations of Alaskan threespine stickleback have repeatedly evolved the same distinctive opercle shape after divergence from an oceanic ancestor. Here we demonstrate that this pattern of parallel evolution is widespread, distinguishing oceanic and freshwater populations across the Pacific Coast of North America and Iceland. We test whether this parallel evolution reflects genetic bias by estimating the additive genetic variance-covariance matrix (G) of opercle shape in an Alaskan oceanic (putative ancestral) population. We find significant additive genetic variance for opercle shape and that G has the potential to be biasing, because of the existence of regions of phenotypic space with low additive genetic variation. However, evolution did not occur along major eigenvectors of G, rather it occurred repeatedly in the same directions of high evolvability. We conclude that the parallel opercle evolution is most likely due to selection during adaptation to freshwater habitats, rather than due to biasing effects of opercle genetic architecture. |
format |
Article in Journal/Newspaper |
author |
Kimmel, Charles B. Cresko, William A. Phillips, Patrick C. Ullmann, Bonnie Currey, Mark von Hippel, Frank Kristjansson, Bjarni K. Gelmond, Ofer McGuigan, Katrina |
author_facet |
Kimmel, Charles B. Cresko, William A. Phillips, Patrick C. Ullmann, Bonnie Currey, Mark von Hippel, Frank Kristjansson, Bjarni K. Gelmond, Ofer McGuigan, Katrina |
author_sort |
Kimmel, Charles B. |
title |
Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
title_short |
Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
title_full |
Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
title_fullStr |
Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
title_full_unstemmed |
Independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
title_sort |
independent axes of genetic variation and parallel evolutionary divergence of opercle bone shape in threespine stickleback |
publisher |
Wiley-Blackwell Publishing |
publishDate |
2012 |
url |
https://espace.library.uq.edu.au/view/UQ:268482 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
doi:10.1111/j.1558-5646.2011.01441.x issn:0014-3820 issn:1558-5646 orcid:0000-0002-0525-2202 IOS-0618738 |
op_doi |
https://doi.org/10.1111/j.1558-5646.2011.01441.x |
container_title |
Evolution |
container_volume |
66 |
container_issue |
2 |
container_start_page |
419 |
op_container_end_page |
434 |
_version_ |
1766040959752077312 |