Hybridization has long been recognized as a fundamental evolutionary process in plants
but, until recently, our understanding of its phylogenetic distribution and biological …

Transposable elements make up a substantial proportion of most plant genomes. Because
they are potentially highly mutagenic, transposons are controlled by a set of mechanisms …

Hybridization is frequent in many organismal groups, but its role in adaptation is poorly
understood. In sunflowers, species found in the most extreme habitats are ancient hybrids …

Even before the publication of Darwin's Origin of Species, the perception of evolutionary
change has been a tree-like pattern of diversification-with divergent branches spreading …

By voluntarily directing attention to a specific region of a visual scene, we can improve our
perception of stimuli at that location. This ability to focus attention upon specific zones of the …

Although invasive plant species often have a hybrid ancestry, unambiguous evidence that
hybridization has stimulated the evolution of invasive behaviors has been difficult to come …

Our understanding of homoploid hybrid speciation has advanced substantially since this
mechanism of species formation was codified 50 years ago. Early theory and research …

Ecology affects each of the three principal processes leading to speciation: genetic
differentiation among populations within species, acquisition of reproductive isolation …

There has been considerable debate about the role of hybrids in the evolutionary process.
One question has involved the relative fitness of hybrid versus non-hybrid genotypes. For …

Homoploid hybrid speciation is the origin of a hybrid species without change in chromosome
number. Although currently thought to be a rare form of speciation, especially relative to the …