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Genomic Mapping of Speciation-Related Traits in Hybridizing Sculpins (Cottus)

European freshwater sculpins, Cottus rhenanus and Cottus perifretum, have formed hybrid lineages (invasive Cottus) in the Lower River Rhine. The hybrid Cottus particularly resembles one of its ancestral species, C. perifretum, in phenotypic features. This contrasts with the fact that the invasive genome...