Pure species discriminate against hybrids in the Drosophila melanogaster species subgroup
| Autor: | Caleigh Koppelman, David Peede, Stephania Zhang, Baylee Roy, Timothy D. Schwochert, Daniel R. Matute, Antonio Serrato-Capuchina |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Gene Flow Species Subgroup Introgression Biology 010603 evolutionary biology 01 natural sciences Gene flow 03 medical and health sciences Genetics Animals Mating Drosophila Ecology Evolution Behavior and Systematics Hybrid Reproduction Reproductive isolation biology.organism_classification 030104 developmental biology Drosophila melanogaster Evolutionary biology Hybridization Genetic Female General Agricultural and Biological Sciences |
| Zdroj: | Evolution; international journal of organic evolutionLITERATURE CITED. 75(7) |
| ISSN: | 1558-5646 |
| Popis: | Introgression, the exchange of alleles between species, is a common event in nature. This transfer of alleles between species must happen through fertile hybrids. Characterizing the traits that cause defects in hybrids illuminates how and when gene flow is expected to occur. Inviability and sterility are extreme examples of fitness reductions but are not the only type of defects in hybrids. Some traits specific to hybrids are more subtle but are important to determine their fitness. In this report, we study whether F1 hybrids between two species pairs of Drosophila are as attractive as the parental species. We find that in both species pairs, the sexual attractiveness of the F1 hybrids is reduced and that pure species discriminate strongly against them. We also find that the cuticular hydrocarbon (CHC) profile of the female hybrids is intermediate between the parental species. Perfuming experiments show that modifying the CHC profile of the female hybrids to resemble pure species improves their chances of mating. Our results show that behavioral discrimination against hybrids might be an important component of the persistence of species that can hybridize. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text