Strength of sexual and postmating prezygotic barriers varies between sympatric populations with different histories and species abundances
| Autor: | Noora Poikela, Maaria Kankare, Rhonda R. Snook, Mareike Wurdack, Anneli Hoikkala, Thomas Schmitt, Johanna Kinnunen, Hannele Kauranen |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Sympatry Reproductive Isolation Reciprocal cross media_common.quotation_subject Population Zoology Biology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Sexual Behavior Animal Genetics Animals education Drosophila Ecology Evolution Behavior and Systematics media_common Population Density Drosophila montana education.field_of_study Reproductive isolation biology.organism_classification Biological Evolution Speciation 030104 developmental biology Sympatric speciation General Agricultural and Biological Sciences |
| Zdroj: | Evolution; international journal of organic evolution. 73(6) |
| ISSN: | 1558-5646 |
| Popis: | The impact of different reproductive barriers on species or population isolation may vary in different stages of speciation depending on evolutionary forces acting within species and through species' interactions. Genetic incompatibilities between interacting species are expected to reinforce prezygotic barriers in sympatric populations and lead to cascade reinforcement between conspecific populations living within and outside the areas of sympatry. We tested these predictions and studied whether and how the strength and target of reinforcement between Drosophila montana and Drosophila flavomontana vary between sympatric populations with different histories and species abundances. All barriers between D. montana females and D. flavomontana males were nearly complete, while in the reciprocal cross strong postzygotic isolation was accompanied by prezygotic barriers whose strength varied according to population composition. Sexual isolation between D. flavomontana females and D. montana males was increased in long-established sympatric populations, where D. flavomontana is abundant, while postmating prezygotic (PMPZ) barriers were stronger in populations where this species is a new invader and still rare and where female discrimination against heterospecific males was lower. Strengthening of sexual and PMPZ barriers in this cross also induced cascade reinforcement of respective barriers between D. flavomontana populations, which is a classic signature of reinforcement process. |
| Databáze: | OpenAIRE |
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