Introgression is emerging as an important source of novel genetic variation, alongside
standing variation and mutation. It is adaptive when such introgressed alleles are …

Levels of genetic differentiation between populations can be highly variable across the
genome, with divergent selection contributing to such heterogeneous genomic divergence …

Species can be defined as populations that are diagnosably distinct, reproductively isolated,
cohesive, or exclusive groups of organisms. Boundaries between species in sympatry are …

The tree of life is highly reticulate, with the history of population divergence emerging from
populations of gene phylogenies that reflect histories of introgression, lineage sorting and …

The origin of biological diversity, via the formation of new species, can be inextricably linked
to adaptation to the ecological environment. Specifically, ecological processes are central to …

Many emerging invasive species display evidence of rapid adaptation. Contemporary
genetic studies demonstrate that adaptation to novel environments can occur within 20 …

Despite hundreds of reports involving both plants and animals, the mechanisms underlying
introgression remain obscure, even if some form of selection is frequently invoked …

A central challenge in evolutionary biology is to identify genes underlying ecologically
important traits and describe the fitness consequences of naturally occurring variation at …

Hybridization in plants and animals is more common and has more complex outcomes than
previously realized. Genome-wide analyses of introgression in organisms ranging from oaks …

Genetic differentiation can be highly variable across the genome. For example, loci under
divergent selection and those tightly linked to them may exhibit elevated differentiation …