The evolution of sexual signaling is linked to odorant receptor tuning in perfume-collecting orchid bees.

Autor:	Brand P; Department of Evolution and Ecology, Center for Population Biology, University of California, 1 Shields Avenue, 95616, Davis, California, USA. pbrand@ucdavis.edu.; Laboratory of Neurophysiology and Behavior, The Rockefeller University, 1230 York Avenue, 10065, New York, New York, USA. pbrand@ucdavis.edu., Hinojosa-Díaz IA; Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Tercer Circuito s/n Ciudad Universitaria Delegación Coyoacán, Apartado Postal 70-153, Ciudad de México, 04510, Mexico., Ayala R; Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 21, San Patricio, Jalisco, 48980, Mexico., Daigle M; Department of Evolution and Ecology, Center for Population Biology, University of California, 1 Shields Avenue, 95616, Davis, California, USA., Yurrita Obiols CL; Centro de Estudios Conservacionistas, Universidad de San Carlos de Guatemala, Avenida La Reforma, 0-63, Guatemala, 01000, Guatemala., Eltz T; Department of Animal Ecology, Evolution and Biodiversity, Ruhr University Bochum, Universitätsstrasse 150, 44801, Bochum, Germany., Ramírez SR; Department of Evolution and Ecology, Center for Population Biology, University of California, 1 Shields Avenue, 95616, Davis, California, USA. sanram@ucdavis.edu.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2020 Jan 13; Vol. 11 (1), pp. 244. Date of Electronic Publication: 2020 Jan 13.
DOI:	10.1038/s41467-019-14162-6
Abstrakt:	Sexual signaling is an important reproductive barrier known to evolve early during the formation of new species, but the genetic mechanisms that facilitate the divergence of sexual signals remain elusive. Here we isolate a gene linked to the rapid evolution of a signaling trait in a pair of nascent neotropical orchid bee lineages, Euglossa dilemma and E. viridissima. Male orchid bees acquire chemical compounds from their environment to concoct species-specific perfumes to later expose during courtship. We find that the two lineages acquire chemically distinct perfumes and are reproductively isolated despite low levels of genome-wide differentiation. Remarkably, variation in perfume chemistry coincides with rapid divergence in few odorant receptor (OR) genes. Using functional assays, we demonstrate that the derived variant of Or41 in E. dilemma is specific towards its species-specific major perfume compound, whereas the ancestral variant in E. viridissima is broadly tuned to multiple odorants. Our results show that OR evolution likely played a role in the divergence of sexual communication in natural populations.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu