Data from: Hybrid speciation by sorting of parental incompatibilities in Italian sparrows

Jo S. Hermansen, Fredrik Haas, Richard I. Bailey, Alexander J. Nederbragt, Cassandra N. Trier, Alfonso Marzal, Glenn-Peter Sætre & Glenn-Peter Saetre
Speciation by hybridization is emerging as a significant contributor to biological diversification. Yet, little is known about the relative contributions of (i) evolutionary novelty and (ii) sorting of preexisting parental incompatibilities to the build-up of reproductive isolation under this mode of speciation. Few studies have addressed empirically whether hybrid animal taxa are intrinsically isolated from their parents, and no study has so far investigated by which of the two aforementioned routes intrinsic barriers evolve. Here,...
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