Uncovering the genetic and evolutionary basis of local adaptation is a major focus of
evolutionary biology. The recent development of cost-effective methods for obtaining high …

Hybridization has a major role in evolution—from the introgression of important phenotypic
traits between species, to the creation of new species through hybrid speciation. Molecular …

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 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 …

Domesticated plants and animals often display dramatic responses to selection, but the
origins of the genetic diversity underlying these responses remain poorly understood …

Introgressive hybridization challenges the concepts we use to define species and infer
phylogenetic relationships. Methods for inferring historical introgression from the genomes …

The flow of genes between different species represents a form of genetic variation whose
implications have not been fully appreciated. Here I examine some key findings on the …

In contrast to the large amount of ecological information supporting the role of natural
selection as a main cause of population divergence and speciation, an understanding of the …

Sunflowers of the genus Helianthus are models for hybridization research and contain three
of the best-studied examples of homoploid hybrid speciation. To understand a broader …

Hybrids between species provide information about the evolutionary processes involved in
divergence. In addition to creating hybrids in the laboratory, biologists can take advantage of …