Data from: Genetic architecture influences when and how hybridization contributes to colonization

The role of genetic architecture in adaptation to novel environments has
received considerable attention when the source of adaptation variation is
de novo mutation. Relatively less is known when the source of adaptive
variation is inter- or intraspecific hybridization. We model hybridization
between divergent source populations and subsequent colonization of an
unoccupied novel environment using individual-based simulations in order
to understand the influence of genetic architecture on the timing of
colonization and the mode of adaptation. We find that two distinct
categories of genetic architecture facilitate rapid colonization but that
they do so in qualitatively different ways. For few and/or tightly linked
loci, the mode of adaptation is via the recovery of adaptive parental
genotypes. With many unlinked loci, the mode of adaptation is via the
generation of novel hybrid genotypes. The first category results in the
shortest colonization lag phases across the widest range of parameter
space, but further adaptation is mutation limited. The second category
takes longer and is more sensitive to genetic variance and dispersal rate,
but can facilitate adaptation to environmental conditions which exceed the
tolerance of parental populations. These findings have implications for
understanding the origins of biological invasions and the success of
hybrid populations.