Data from: Hybridization, natural selection and evolution of reproductive isolation: a 25-years survey of an artificial sympatric area between two mosquito sibling species of the Aedes mariae complex
Natural selection can act against maladaptive hybridization between co-occurring divergent populations leading to evolution of reproductive isolation among them. A critical unanswered question about this process that provides a basis for the theory of speciation by reinforcement, is whether natural...
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Zusammenfassung: | Natural selection can act against maladaptive hybridization between
co-occurring divergent populations leading to evolution of reproductive
isolation among them. A critical unanswered question about this process
that provides a basis for the theory of speciation by reinforcement, is
whether natural selection can cause hybridization rates to evolve to zero.
Here we investigated this issue in two sibling mosquitoes species, Aedes
mariae and Ae. zammitii, that show post-mating reproductive isolation (F1
males sterile) and partial pre-mating isolation (different height of
mating swarms) that could be reinforced by natural selection against
hybridization. In 1986, we created an artificial sympatric area between
the two species and sampled about 20,000 individuals over the following 25
years. Between 1986 to 2011, the composition of mating swarms and the
hybridization rate between the two species were investigated across time
in the sympatric area. Our results showed that Ae. mariae and Ae. zammitii
have not completed reproductive isolation since their first contact in the
artificial sympatric area. We have discussed the relative role of factors
such as time of contact, gene flow, strength of natural selection, and
biological mechanisms causing prezygotic isolation to explain the observed
results. |
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DOI: | 10.5061/dryad.39qf1 |