A multispecies BCO2 beak color polymorphism in the Darwin's finch radiation.

Autor:	Enbody ED; Department of Medical Biochemistry and Microbiology, Uppsala University, SE-751 23 Uppsala, Sweden. Electronic address: erik.enbody@gmail.com., Sprehn CG; Department of Medical Biochemistry and Microbiology, Uppsala University, SE-751 23 Uppsala, Sweden., Abzhanov A; Department of Life Sciences, Imperial College London, Silwood Park Campus, SL5 7PY Ascot, UK., Bi H; Department of Medical Biochemistry and Microbiology, Uppsala University, SE-751 23 Uppsala, Sweden., Dobreva MP; Department of Life Sciences, Imperial College London, Silwood Park Campus, SL5 7PY Ascot, UK., Osborne OG; School of Natural Sciences, Bangor University, Environment Centre Wales, Deiniol Road, Bangor LL57 2UW, UK., Rubin CJ; Department of Medical Biochemistry and Microbiology, Uppsala University, SE-751 23 Uppsala, Sweden., Grant PR; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA., Grant BR; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA., Andersson L; Department of Medical Biochemistry and Microbiology, Uppsala University, SE-751 23 Uppsala, Sweden; Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 75007 Uppsala, Sweden; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-4458, USA. Electronic address: leif.andersson@imbim.uu.se.
Jazyk:	angličtina
Zdroj:	Current biology : CB [Curr Biol] 2021 Dec 20; Vol. 31 (24), pp. 5597-5604.e7. Date of Electronic Publication: 2021 Oct 22.
DOI:	10.1016/j.cub.2021.09.085
Abstrakt:	Carotenoid-based polymorphisms are widespread in populations of birds, fish, and reptiles, 1 but generally little is known about the factors affecting their maintenance in populations. 2 We report a combined field and molecular-genetic investigation of a nestling beak color polymorphism in Darwin's finches. Beaks are pink or yellow, and yellow is recessive. 3 Here we show that the polymorphism arose in the Galápagos half a million years ago through a mutation associated with regulatory change in the BCO2 gene and is shared by 14 descendant species. The polymorphism is probably a balanced polymorphism, maintained by ecological selection associated with survival and diet. In cactus finches, the frequency of the yellow genotype is correlated with cactus fruit abundance and greater hatching success and may be altered by introgressive hybridization. Polymorphisms that are hidden as adults, as here, may be far more common than is currently recognized, and contribute to diversification in ways that are yet to be discovered. Competing Interests: Declaration of interests Authors declare no competing interests. (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu