Rapid evolution of chemosensory receptor genes in a pair of sibling species of orchid bees (Apidae: Euglossini)
| العنوان: | Rapid evolution of chemosensory receptor genes in a pair of sibling species of orchid bees (Apidae: Euglossini) |
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| المؤلفون: | Philipp Brand, Thomas Eltz, Santiago R. Ramírez, Florian Leese, Ralph Tollrian, José Javier G. Quezada-Euán |
| المصدر: | BMC evolutionary biology, vol 15, iss 1 BMC Evolutionary Biology |
| بيانات النشر: | Springer Science and Business Media LLC, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Male, Olfactory system, Evolution, Odorant binding, media_common.quotation_subject, Insect, Receptors, Odorant, Pheromones, Evolution, Molecular, Receptors, Genetics, Animals, Gene family, Phylogeny, Ecology, Evolution, Behavior and Systematics, media_common, Evolutionary Biology, Apidae, biology, Ecology, Molecular, Bees, biology.organism_classification, Euglossa dilemma, Euglossini, Smell, Odorant, Evolutionary biology, Insect Proteins, Pheromone, Female, Biologie, Research Article |
| الوصف: | Background Insects rely more on chemical signals (semiochemicals) than on any other sensory modality to find, identify, and choose mates. In most insects, pheromone production is typically regulated through biosynthetic pathways, whereas pheromone sensory detection is controlled by the olfactory system. Orchid bees are exceptional in that their semiochemicals are not produced metabolically, but instead male bees collect odoriferous compounds (perfumes) from the environment and store them in specialized hind-leg pockets to subsequently expose during courtship display. Thus, the olfactory sensory system of orchid bees simultaneously controls male perfume traits (sender components) and female preferences (receiver components). This functional linkage increases the opportunities for parallel evolution of male traits and female preferences, particularly in response to genetic changes of chemosensory detection (e.g. Odorant Receptor genes). To identify whether shifts in pheromone composition among related lineages of orchid bees are associated with divergence in chemosensory genes of the olfactory periphery, we searched for patterns of divergent selection across the antennal transcriptomes of two recently diverged sibling species Euglossa dilemma and E. viridissima. Results We identified 3185 orthologous genes including 94 chemosensory loci from five different gene families (Odorant Receptors, Ionotropic Receptors, Gustatory Receptors, Odorant Binding Proteins, and Chemosensory Proteins). Our results revealed that orthologs with signatures of divergent selection between E. dilemma and E. viridissima were significantly enriched for chemosensory genes. Notably, elevated signals of divergent selection were almost exclusively observed among chemosensory receptors (i.e. Odorant Receptors). Conclusions Our results suggest that rapid changes in the chemosensory gene family occurred among closely related species of orchid bees. These findings are consistent with the hypothesis that strong divergent selection acting on chemosensory receptor genes plays an important role in the evolution and diversification of insect pheromone systems. |
| وصف الملف: | application/pdf |
| تدمد: | 1471-2148 |
| DOI: | 10.1186/s12862-015-0451-9 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b47908fd82de33c3bba1dd63de6e525 https://doi.org/10.1186/s12862-015-0451-9 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....3b47908fd82de33c3bba1dd63de6e525 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14712148 |
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| DOI: | 10.1186/s12862-015-0451-9 |