Data from: Tangled banks: a landscape genomic evaluation of wallace's riverine barrier hypothesis for three amazon plant species

Wallace’s Riverine Barrier hypotheses is one of the earliest biogeographic
explanations for Amazon speciation, but it has rarely been tested in
plants. In this study, we used three woody Amazonian plant species to
evaluate Wallace’s Hypothesis using tools of landscape genomics. We
generated unlinked single-nucleotide polymorphism (SNP) data from the
nuclear genomes of 234 individuals (78 for each plant species) across 13
sampling sites along the Rio Branco, Brazil, for Amphirrhox longifolia
(8,075 SNPs), Psychotria lupulina, (9,501 SNPs) and Passiflora spinosa
(14,536 SNPs). Although significantly different migration rates were
estimated between species, the population structure data do not support
the hypothesis that the Rio Branco – an allopatric barrier for primates
and birds – is a significant genetic barrier for Amphirrhox longifolia,
Passiflora spinosa, or Psychotria lupulina. Overall, we demonstrated that
medium-sized rivers in the Amazon Basin, such as the Rio Branco, are
permeable barriers to gene flow for animal dispersed and animal pollinated
plant species.