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Tytuł:
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The Genetics of Seasonal Migration and Plumage Color.
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Autorzy:
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Delmore KE; Biodiversity Research Center, University of British Columbia, Vancouver, BC V6T 1Z4, Canada. Electronic address: .
Toews DP; Biodiversity Research Center, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
Germain RR; Biodiversity Research Center, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
Owens GL; Biodiversity Research Center, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
Irwin DE; Biodiversity Research Center, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
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Źródło:
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Current biology : CB [Curr Biol] 2016 Aug 22; Vol. 26 (16), pp. 2167-73. Date of Electronic Publication: 2016 Jul 28.
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Typ publikacji:
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Journal Article; Research Support, Non-U.S. Gov't
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Język:
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English
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Imprint Name(s):
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Publication: Cambridge, MA : Cell Press
Original Publication: London, UK : Current Biology Ltd., c1991-
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MeSH Terms:
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Animal Migration*
Genetic Variation*
Pigmentation/*genetics
Songbirds/*physiology
Animals ; British Columbia ; Color ; Feathers/physiology ; Female ; Hybridization, Genetic ; Male ; Phenotype ; Songbirds/genetics
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Entry Date(s):
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Date Created: 20160802 Date Completed: 20171227 Latest Revision: 20180319
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Update Code:
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20240104
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DOI:
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10.1016/j.cub.2016.06.015
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PMID:
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27476599
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Details on the genetics of behavioral and quantitative phenotypes remain limited to a few organisms. Such information is central to understanding both adaptation and speciation, as many of these phenotypes reduce gene flow between taxa [1-3]. Hybrid zones provide an ideal arena for studying this topic, as they consist of recombinant genotypes that allow genetic mapping of traits distinguishing natural populations [4]. We examined the genetic basis of migratory orientation and plumage color, both of which may contribute to speciation, in a hybrid zone between two groups of Swainson's thrushes that differ in these traits. We identified a cluster of SNPs on chromosome 4 strongly associated with migratory orientation. Genes involved with the circadian clock, nervous system, and cell signaling were located here and included candidates implicated in smaller-scale studies of migration in different animal groups, supporting previous suggestions that there is a common gene package for migration [5]. Plumage color was more polygenic than migratory orientation but showed strong associations on the Z chromosome that included SNPs linked to TYRP1, a gene involved in the production of eumelanin. We integrated these results with genomic data from pure populations and found that regions associated with both phenotypes co-localized with regions of elevated relative differentiation between the groups. This finding relates to the literature on islands of differentiation [6-8] by implicating divergent selection in generating these peaks. Together, our results identify specific genomic regions involved in both the regulation of complex phenotypes across animal groups and speciation [9].
(Copyright © 2016 Elsevier Ltd. All rights reserved.)
Comment in: Curr Biol. 2016 Nov 7;26(21):R1155-R1157. (PMID: 27825455)
