Genomic changes underlying repeated niche shifts in an adaptive radiation

Simple item page
dc.contributor.authorReimchen, Thomas E.
dc.contributor.authorMarques, David A.
dc.contributor.authorJones, Felicity C.
dc.contributor.authorDi Palma, Federica
dc.contributor.authorKingsley, David M.
dc.date.accessioned2022-07-14T16:56:19Z
dc.date.available2022-07-14T16:56:19Z
dc.date.copyright2022en_US
dc.date.issued2022-04-10
dc.descriptionWe would like to thank C. B. Lowe, S. D. Brady, B. Deagle, J. Turner, K. Lindblad-Toh, and the Broad Genomics Platforms for assistance with samples and sequencing; B. Moa for bioinformatics support; and M. Muschick for discussionen_US
dc.description.abstractIn adaptive radiations, single lineages rapidly diversify by adapting to many new niches. Little is known yet about the genomic mechanisms involved, that is, the source of genetic variation or genomic architecture facilitating or constraining adaptive radiation. Here, we investigate genomic changes associated with repeated invasion of many different freshwater niches by threespine stickleback in the Haida Gwaii archipelago, Canada, by resequencing single genomes from one marine and 28 freshwater populations. We find 89 likely targets of parallel selection in the genome that are enriched for old standing genetic variation. In contrast to theoretical expectations, their genomic architecture is highly dispersed with little clustering. Candidate genes and genotype-environment correlations match the three major environmental axes predation regime, light environment, and ecosystem size. In a niche space with these three dimensions, we find that the more divergent a new niche from the ancestral marine habitat, the more loci show signatures of parallel selection. Our findings suggest that the genomic architecture of parallel adaptation in adaptive radiation depends on the steepness of ecological gradients and the dimensionality of the niche space.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work was funded by the National Research Council Canada grant NRC2354 to TER and National Institute of Health grants 3P50HG002568-09S1 ARRA and 3P50HG002568 to DMK; DAM was also supported through the Swiss National Science Foundation grant 31003A_163338 to O. Seehausen and L. Excoffier. Open Access Funding provided by Universitat Bern.en_US
dc.identifier.citationMarques, D.A., Jones, F.C., Di Palma, F., Kingsley, D.M. and Reimchen, T.E. (2022), Genomic changes underlying repeated niche shifts in an adaptive radiation. Evolution, 76: 1301-1319. https://doi.org/10.1111/evo.14490en_US
dc.identifier.urihttps://doi.org/10.1111/evo.14490
dc.identifier.urihttp://hdl.handle.net/1828/14060
dc.language.isoenen_US
dc.publisherEvolution: International Journal of Organic Evolutionen_US
dc.subjectAdaptive radiation
dc.subjectgenomics
dc.subjectHaida Gwaii
dc.subjectniche shift
dc.subjectniche space
dc.subjectthreespine stickleback
dc.subject.departmentDepartment of Biology
dc.titleGenomic changes underlying repeated niche shifts in an adaptive radiationen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Reimchen_Evolution_2022.pdf
Size:
2.04 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Faculty and Staff Publications
 
University of Victoria Libraries

We acknowledge and respect the Lək̓ʷəŋən (Songhees and Esquimalt) Peoples on whose territory the university stands, and the Lək̓ʷəŋən and W̱SÁNEĆ Peoples whose historical relationships with the land continue to this day.