Intrinsic postzygotic barriers can play an important and multifaceted role in speciation, but
their contribution is often thought to be reserved to the final stages of the speciation process …

The transition from outcrossing to self-fertilization is one of the most common evolutionary
changes in plants, yet only about 10–15% of flowering plants are predominantly selfing. To …

Autopolyploidy is more common in plants than traditionally assumed, but has received little
attention compared with allopolyploidy. Hence, the advantages and disadvantages of …

Background There are conflicting views between palaeobotanists and plant systematists/
evolutionary biologists regarding the occurrence of plant speciation in the Quaternary …

Compared to those of their parents, are the traits of first-generation (F1) hybrids typically
intermediate, biased toward one parent, or mismatched for alternative parental phenotypes …

Surprisingly little attention has been given to the impact of selfing on speciation, even
though selfing reduces gene flow between populations and affects other key population …

Reproductive isolation is both an indicator of speciation and a mechanism for maintaining
species identity. Here we review the progress in studies of hybrid sterility in rice to illustrate …

Traditionally, the Arctic has been viewed as an 'evolutionary freezer'with low evolutionary
rates caused by extreme environmental constraints and depauperated by repeated …

Adaptation to local conditions likely plays an important role in plant diversity and speciation.
A fuller understanding of the role of adaptation in speciation requires connecting particular …

Phylogenetic analyses of sequence data from the internal transcribed spacer regions of the
nuclear ribosomal DNA (ITS) and the plastid trnL–F region were conducted to reconstruct …