Multiple Routes to Color Convergence in a Radiation of Neotropical Poison Frogs.

Autor: Twomey E; Department of Wildlife/Zoo Animal Biology and Systematics, Faculty of Biological Sciences, Goethe University Frankfurt, Max-von-Laue-Str. 13, Frankfurt am Main 60438, Germany., Melo-Sampaio P; Departamento de Vertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, R. Gen. Herculano Gomes 41, Rio de Janeiro 20941-360, Brazil., Schulte LM; Department of Wildlife/Zoo Animal Biology and Systematics, Faculty of Biological Sciences, Goethe University Frankfurt, Max-von-Laue-Str. 13, Frankfurt am Main 60438, Germany., Bossuyt F; Amphibian Evolution Laboratory, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, Brussels 1050, Belgium., Brown JL; School of Biological Sciences, Southern Illinois University, 125 Lincoln Dr., Carbondale, IL 62901, USA., Castroviejo-Fisher S; Departamento de Zoología, Universidad de Sevilla, Av. de la Reina Mercedes, Seville 41012, Spain.
Jazyk: angličtina
Zdroj: Systematic biology [Syst Biol] 2023 Dec 30; Vol. 72 (6), pp. 1247-1261.
DOI: 10.1093/sysbio/syad051
Abstrakt: Convergent evolution is defined as the independent evolution of similar phenotypes in different lineages. Its existence underscores the importance of external selection pressures in evolutionary history, revealing how functionally similar adaptations can evolve in response to persistent ecological challenges through a diversity of evolutionary routes. However, many examples of convergence, particularly among closely related species, involve parallel changes in the same genes or developmental pathways, raising the possibility that homology at deeper mechanistic levels is an important facilitator of phenotypic convergence. Using the genus Ranitomeya, a young, color-diverse radiation of Neotropical poison frogs, we set out to 1) provide a phylogenetic framework for this group, 2) leverage this framework to determine if color phenotypes are convergent, and 3) to characterize the underlying coloration mechanisms to test whether color convergence occurred through the same or different physical mechanisms. We generated a phylogeny for Ranitomeya using ultraconserved elements and investigated the physical mechanisms underlying bright coloration, focusing on skin pigments. Using phylogenetic comparative methods, we identified several instances of color convergence, involving several gains and losses of carotenoid and pterin pigments. We also found a compelling example of nonparallel convergence, where, in one lineage, red coloration evolved through the red pterin pigment drosopterin, and in another lineage through red ketocarotenoids. Additionally, in another lineage, "reddish" coloration evolved predominantly through structural color mechanisms. Our study demonstrates that, even within a radiation of closely related species, convergent evolution can occur through both parallel and nonparallel mechanisms, challenging the assumption that similar phenotypes among close relatives evolve through the same mechanisms.
(© The Author(s) 2023. Published by Oxford University Press on behalf of the Society of Systematic Biologists.)
Databáze: MEDLINE
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