Data from: Rapid polygenic response to secondary contact in a hybrid species

Glenn-Peter Sætre, Angelica Cuevas, Jo S. Hermansen, Tore O. Elgvin, Laura Piñeiro Fernández, Stein A. Sæther, Camilla Lo Cascio Sætre & Fabrice Eroukhmanoff
Secondary contact between closely related species can have genetic consequences. Competition for essential resources may lead to divergence in heritable traits that reduces interspecific competition, thus leading to increased genetic divergence. Conversely, hybridization and backcrossing can lead to genetic convergence. Here we study a population of a hybrid species, the Italian sparrow (Passer italiae), before and after it came into secondary contact with one of its parent species, the Spanish sparrow (P. hispaniolensis), in 2013....
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