The mechanisms of reproductive isolation that cause phenotypic diversification and
eventually speciation are a major topic of evolutionary research. Hybrid necrosis is a post …

In just the last few years, plant geneticists have made tremendous progress in identifying the
molecular genetic basis of postzygotic reproductive isolation. With more than a dozen genes …

Many botanists doubt the existence of plant species,,,,, viewing them as arbitrary constructs
of the human mind, as opposed to discrete, objective entities that represent reproductively …

Reproductive isolation: Natural selection at work: Current Biology Skip to Main Content
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Ecological factors, hybrid sterility and differences in ploidy levels are well known for
contributing to gene-flow barriers in plants. Another common postzygotic incompatibility …

Evolution is based on genetic variability and subsequent phenotypic selection. Mechanisms
that modulate the rate of mutation according to environmental cues, and thus control the …

Parallel evolution of similar traits in independent populations that inhabit ecologically similar
environments strongly implicates natural selection as the cause of evolution. Parallel …

Speciation is characterized by the evolution of reproductive isolation between two groups of
organisms. Understanding the process of speciation requires the quantification of barriers to …

Reproductive isolation in plants occurs through multiple barriers that restrict gene flow
between populations, but their origins remain uncertain. Work in the past decade has shown …

Reproductive strategies play a major role in plant speciation. Notably, transitions from
outcrossing to selfing may lead to relaxed sexual selection and parental conflict. Shifts in …