Divergent selection on opsins drives incipient speciation in Lake Victoria cichlids
| Autor: | Yohey Terai, Hiroo Imai, Tohru Sugawara, Kazuhiko Takahashi, Shinji Mizoiri, Nellie Konijnendijk, Ole Seehausen, Tetsu Sato, Hillary D. J. Mrosso, Yoshinori Shichida, Takeshi Sasaki, Masakatsu Watanabe, Hidenori Tachida, Norihiro Okada |
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| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Male
QH301-705.5 Genetic Speciation Teleost Fishes reproductive isolation Molecular Sequence Data Fresh Water sensory drive Biology dna General Biochemistry Genetics and Molecular Biology Ecological speciation vertebrate visual pigments Molecular evolution Cichlid Genetic algorithm Animals sexual selection Biology (General) Selection Genetic gene Alleles fish Evolutionary Biology Natural selection General Immunology and Microbiology Behavior Animal Ecology spectral sensitivity molecular evolution General Neuroscience Spectrum Analysis Rod Opsins Cichlids Pigments Biological Incipient speciation Africa Eastern biology.organism_classification Divergent evolution Evolutionary biology color-vision Synopsis General Agricultural and Biological Sciences Research Article |
| Zdroj: | PLoS Biology PLoS Biology, Vol 4, Iss 12, p e433 (2006) |
| Popis: | Divergent natural selection acting on ecological traits, which also affect mate choice, is a key element of ecological speciation theory, but has not previously been demonstrated at the molecular gene level to our knowledge. Here we demonstrate parallel evolution in two cichlid genera under strong divergent selection in a gene that affects both. Strong divergent natural selection fixed opsin proteins with different predicted light absorbance properties at opposite ends of an environmental gradient. By expressing them and measuring absorbance, we show that the reciprocal fixation adapts populations to divergent light environments. The divergent evolution of the visual system coincides with divergence in male breeding coloration, consistent with incipient ecological by-product speciation. The rapid evolution of African cichlid fish driven by strong divergent selection is revealed in a gene that is responsible for ecological adaptation. This gene also affects mate choice and is thus consistent with incipient ecological by-product speciation. |
| Databáze: | OpenAIRE |
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