How barriers to gene flow arise and are maintained are key questions in evolutionary
biology. Speciation research has mainly focused on barriers that occur either before mating …

Living in high latitudes and altitudes sets specific requirements on species' ability to forecast
seasonal changes and to respond to them in an appropriate way. Adaptation into diverse …

Speciation with gene flow is now widely regarded as common. However, the frequency of
introgression between recently diverged species and the evolutionary consequences of …

Species that coexist in hybrid zones sexually isolate through reproductive character
displacement, a mechanism that favours divergence between species. In Drosophila …

Interspecific gene flow (introgression) is an important source of new genetic variation, but
selection against it can reinforce reproductive barriers between interbreeding species. We …

Background Tracing the association between insect cold tolerance and latitudinally and
locally varying environmental conditions, as well as key morphological traits and molecular …

Brachionus calyciflorus is a recently described monogonont rotifer species complex that
comprises four species. The observation of hybridisation between two of these species …

Chromosomal inversions may play a central role in speciation given their ability to locally
reduce recombination and therefore genetic exchange between diverging populations. We …

Male secondary sexual traits are one of the most striking and diverse features of the animal
kingdom. While these traits are often thought to evolve via sexual selection, many questions …

Abstract Euschistus heros (Hemiptera: Pentatomidae) has two allopatric strains with a hybrid
zone in central Brazil. Asymmetric dispersal and gene flow between these strains of E. heros …