Data from: Impact of a putative riverine barrier on genomic population structure and gene flow in the presence of sexual selection

Gene flow connects populations and facilitates the exchange of alleles,
impacting speciation and adaptation. In western Panama, lekking
golden-collared and white-collared manakins (Manacus vitellinus and M.
candei, respectively) interbreed in a narrow hybrid zone across which
males’ brilliant yellow collar plumage, principally controlled by the
carotenoid metabolism gene BCO2,  has introgressed from
vitellinus into candei under sexual selection. Plumage introgression is
sharply limited across the lower reaches of the widest river in the
region, but both color morphs occur on both riverbanks at its headwaters.
Previous authors have speculated that the river may be a strong barrier to
gene flow, preventing further plumage color introgression, but this
hypothesis has never been tested. In this study, we used between ~10,000
and 14,000 single nucleotide polymorphisms (SNPs) to test this hypothesis
by assessing genetic differentiation and estimating gene flow across the
river. The data associated with this study include VCF files containing
genetic variants, information on demographic modeling of cross-river
populations, and scripts used to run the analyses.