Genome-wide differentiation in closely related populations: the roles of selection and geographic isolation

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dc.contributor.authorSafran, Rebecca J.
dc.contributor.authorScordato, Elizabeth S. C.
dc.contributor.authorWilkins, Matthew R.
dc.contributor.authorHubbard, Joanna K.
dc.contributor.authorJenkins, Brittany R.
dc.contributor.authorAlbrecht, Tomas
dc.contributor.authorKaraardıç, Hakan
dc.contributor.authorVortman,Yoni
dc.contributor.authorArnon, Lotem
dc.contributor.authorPap, Peter L.
dc.contributor.authorShen, Sheng-Feng
dc.contributor.authorChan, Shih-Fan
dc.contributor.authorParchman, Thomas L.
dc.contributor.authorKane, Nolan C.
dc.contributor.authorNosil, Patrik
dc.date.accessioned2021-02-19T21:16:36Z
dc.date.available2021-02-19T21:16:36Z
dc.date.issued2016
dc.departmentALKÜ
dc.descriptionShih-Fan, Chan/0000-0003-2955-9433; Shen, Sheng-Feng/0000-0002-0631-6343; Albrecht, Tomas/0000-0002-9213-0034; Karaardic, Hakan/0000-0001-9839-4201; Wilkins, Matthew/0000-0002-3162-6749
dc.description.abstractPopulation divergence in geographic isolation is due to a combination of factors. Natural and sexual selection may be important in shaping patterns of population differentiation, a pattern referred to as 'isolation by adaptation' (IBA). IBA can be complementary to the well-known pattern of 'isolation by distance' (IBD), in which the divergence of closely related populations (via any evolutionary process) is associated with geographic isolation. The barn swallow Hirundo rustica complex comprises six closely related subspecies, where divergent sexual selection is associated with phenotypic differentiation among allopatric populations. To investigate the relative contributions of selection and geographic distance to genome-wide differentiation, we compared genotypic and phenotypic variation from 350 barn swallows sampled across eight populations (28 pairwise comparisons) from four different subspecies. We report a draft whole-genome sequence for H. rustica, to which we aligned a set of 9493 single nucleotide polymorphisms (SNPs). Using statistical approaches to control for spatial autocorrelation of phenotypic variables and geographic distance, we find that divergence in traits related to migratory behaviour and sexual signalling, as well as geographic distance, together explain over 70% of genome-wide divergence among populations. Controlling for IBD, we find 42% of genomewide divergence is attributable to IBA through pairwise differences in traits related to migratory behaviour and sexual signalling alone. By (i) combining these results with prior studies of how selection shapes morphological differentiation and (ii) accounting for spatial autocorrelation, we infer that morphological adaptation plays a large role in shaping population -level differentiation in this group of closely related populations.
dc.description.sponsorshipNational Science FoundationNational Science Foundation (NSF) [DEB-CAREER-1149942]; NSFNational Science Foundation (NSF); Royal Society of LondonRoyal Society of London; Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic [LH14045]
dc.description.sponsorshipWe thank C. Alex Buerkle for collaboration on all aspects of this project and the Safran, Kane and Flaxman laboratory groups at the University of Colorado for feedback and advice. We thanks Matthew Evans for collaboration on barn swallows in the UK. Funding for this project was provided by the National Science Foundation (DEB-CAREER-1149942) to R.J.S. M.R.W was supported by an NSF graduate research fellowship and P.N by a Royal Society of London University Research Fellowship. Work in the Czech Republic was funded by the Ministry of Education, Youth and Sports of the Czech Republic (project LH14045). All field and laboratory protocols were compliant with University of Colorado, and Federal animal care and import/export protocols. We are grateful for the excellent reviews provided by Dr. Anna Santure and three anonymous reviewers.
dc.identifier.doi10.1111/mec.13740
dc.identifier.endpage3883en_US
dc.identifier.issn0962-1083
dc.identifier.issn1365-294X
dc.identifier.issue16en_US
dc.identifier.pmid27357267
dc.identifier.scopusqualityQ1
dc.identifier.startpage3865en_US
dc.identifier.urihttps://doi.org/10.1111/mec.13740
dc.identifier.urihttps://hdl.handle.net/20.500.12868/489
dc.identifier.volume25en_US
dc.identifier.wosWOS:000381578200007
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthor0-belirlenecek
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofMolecular Ecology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectclimate variability
dc.subjectgenomic divergence
dc.subjectgenotvping by sequencing
dc.subjectpopulation genetics
dc.subjectreproductive isolation
dc.subjectspcciation
dc.titleGenome-wide differentiation in closely related populations: the roles of selection and geographic isolation
dc.typeArticle

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