Intraspecific genomic variation and local adaptation in a young hybrid species

Angelica Cuevas, Mark Ravinet, Glenn-Peter Sætre & Fabrice Eroukhmanoff
Hybridization increases genetic variation, hence hybrid species may have greater evolutionary potential once their admixed genomes have stabilized and incompatibilities have been purged. Yet, little is known about how such hybrid lineages evolve at the genomic level following their formation, in particular their adaptive potential. Here we investigate how the Italian sparrow (Passer italiae), a homoploid hybrid species, has evolved and locally adapted to its variable environment. Using restriction site-associated DNA sequencing (RAD-seq) on several...
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