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The repeated transition from outcrossing to selfing is a key topic in evolutionary biology. However, the molecular basis of such shifts has been rarely examined due to lack of knowledge of the genes controlling these transitions. A classic example of mating system transition is the repeated shift from heterostyly to homostyly. Occurring in 28 angiosperm families, heterostyly is characterized by the...
One of the most common trends in plant evolution, loss of self‐incompatibility and ensuing increases in selfing, is generally assumed to be associated with a suite of phenotypic changes, notably a reduction of floral size, termed the selfing syndrome. We investigate whether floral morphological traits indeed decrease in a deterministic fashion after losses of self‐incompatibility, as traditionally...
1. Unreliable pollinator service is thought to promote the evolution of self‐compatible plant breeding systems, because selfing may provide reproductive assurance when outcrossing opportunity is limited. The recurrent evolution of self‐compatible homostyly from obligately outcrossing heterostylous species has been regarded as a classic example of evolutionary response to lack of pollinators or mates,...
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