The metaphor of 'genomic islands of speciation'was first used to describe heterogeneous
differentiation among loci between the genomes of closely related species. The biological …

Despite taxonomy's 250‐year history, the past 20 years have borne witness to remarkable
advances in technology and techniques, as well as debate. DNA barcoding has generated a …

Genetic data often exhibit patterns broadly consistent with'isolation by distance'—a
phenomenon where genetic similarity decays with geographic distance. In a heterogeneous …

Most speciation events probably occur gradually, without complete and immediate
reproductive isolation, but the full extent of gene flow between diverging species has rarely …

It is widely documented that hybridisation occurs between many closely related species, but
the importance of introgression in adaptive evolution remains unclear, especially in animals …

Species are generally viewed by evolutionists as 'real'distinct entities in nature, making
speciation appear difficult. Charles Darwin had originally promoted a very different …

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 …

Research into Heliconius butterflies has made a significant contribution to evolutionary
biology. Here, we review our understanding of the diversification of these butterflies …

Background To understand speciation and the maintenance of taxa as separate entities, we
need information about natural hybridization and gene flow among species. Results …

Estimates of the timing of divergence are central to testing the underlying causes of
speciation. Relaxed molecular clocks and fossil calibration have improved these estimates; …