Differences in style length confer prezygotic isolation between two dioecious species of Silene in sympatry.

One fundamental signature of reinforcement is elevated prezygotic reproductive isolation between related species in sympatry relative to allopatry. However, this alone is inadequate evidence for reinforcement, as traits conferring reproductive isolation can occur as a by-product of other forces. We conducted crosses between Silene latifolia and S.

Selection and constraint on regulatory elements in Drosophila simulans.

We utilized available Drosophila simulans molecular population genomic data to characterize sequence polymorphism in noncoding regulatory regions and their corresponding transcribed target genes or interacting transcription factors. We highlight two properties of regulatory evolution. First, we find that sequence divergence between D.