In the past decade, advances in genome sequencing have allowed researchers to uncover
the history of hybridization in diverse groups of species, including our own. Although the …

Epistasis occurs when the effect of a mutation depends on its carrier's genetic background.
Despite increasing evidence that epistasis for fitness is common, its role during evolution is …

Speciation results from the progressive accumulation of mutations that decrease the
probability of mating between parental populations or reduce the fitness of hybrids—the so …

By formalizing the relationship between genotype or phenotype and fitness, fitness
landscapes harbor information on molecular and evolutionary constraints. The shape of the …

Many traits of interest are highly heritable and genetically complex, meaning that much of
the variation they exhibit arises from differences at numerous loci in the genome. Complex …

The genomic era has made clear that introgression, or the movement of genetic material
between species, is a common feature of evolution. Examples of both adaptive and …

Adaptation often proceeds from standing variation, and natural selection acting on pairs of
populations is a quantitative continuum ranging from parallel to divergent. Yet, it is unclear …

The evolution of postzygotic reproductive isolation is an important component of speciation.
But before isolation is complete there is sometimes a phase of heterosis in which hybrid …

Rates of hybridization are predicted to increase due to climate change and human activity
that cause redistribution of species and bring previously isolated populations into contact. At …

Independently evolving populations may adapt to similar selection pressures via different
genetic changes. The interactions between such changes, such as in a hybrid individual …