Like the formation of animal species, plant speciation is characterized by the evolution of
barriers to genetic exchange between previously interbreeding populations. Prezygotic barriers…

The origin of new homoploid species via hybridization is theoretically difficult because it
requires the development of reproductive isolation in sympatry. Nonetheless, this mode is often …

Several authors have proposed that speciation frequently occurs when a population becomes
fixed for one or more chromosomal rearrangements that reduce fitness when they are …

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, and …

The production of extreme or ‘transgressive’phenotypes in segregating hybrid populations
has been speculated to contribute to niche divergence of hybrid lineages. Here, we assess …

Since its discovery in 1907, polyploidy has been recognized as an important phenomenon
in vascular plants, and several lines of evidence indicate that most, if not all, plant species …

The narrowing of diversity in crop species contributing to the world’s food supplies has been
considered a potential threat to food security. However, changes in this diversity have not …

An introduction is presented in which the editors discuss various reports within the issue on
topics including the review of the available NGS technologies and different aspects of its …

The eighteenth-century Malthusian prediction of population growth outstripping food production
has not yet come to bear. Unprecedented agricultural land expansions since 1700, and …

During the past decade, molecular techniques have provided a wealth of data that have
facilitated the resolution of several controversial questions in polyploid evolution. Herein we …