Parasitism is widely viewed as the primary cost of sociality and a constraint on group size,
yet studies report varied associations between group size and parasitism. Using the largest …

Unambiguous examples of ecological causation of sexual dimorphism are rare, and the best
evidence involves sexual differences in trophic morphology. We show that moderate female…

Classical models suggest that recombination rates on sex chromosomes evolve in a stepwise
manner to localize sexually antagonistic variants in the sex in which they are beneficial, …

It has long been recognized that natural selection during the haploid gametophytic phase of
the plant life cycle may have widespread importance for rates of evolution and the …

Gene flow is thought to impede genetic divergence and speciation by homogenizing
genomes. Recent theory and research suggest that sufficiently strong divergent selection can …

There is growing evidence from diverse taxa for sex differences in the genomic landscape
of recombination, but the causes and consequences of these differences remain poorly …

Reproductive isolation between selfing and outcrossing species can arise through diverse
mechanisms, some of which are directly associated with differences in mating system. We …

Hybridization between species can affect the strength of the reproductive barriers that
separate those species. Two extensions of this effect are (1) the expectation that asymmetric …

Although the evolution of the selfing syndrome often involves reductions in floral size, pollen
and nectar, few studies of selfing syndrome divergence have examined nectar. We …

The frequent transition from outcrossing to selfing in flowering plants is often accompanied
by changes in multiple aspects of floral morphology, termed the “selfing syndrome.” While the …