Journal
BIOESSAYS
Volume 27, Issue 5, Pages 472-476Publisher
WILEY
DOI: 10.1002/bies.20231
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Changes in breeding system are a regular evolutionary change in plants, as self-fertilisation is often advantageous, particularly for weedy and colonising species. The adoption of Arabidopsis thaliana as a plant model species has led to interest in how self-incompatibility was lost so that this species became highly inbreeding. Molecular evolutionary approaches have recently focused on investigating two loci involved in the incompatibility recognition process in related Arabidopsis species; nonfunctional copies of these genes still exist in A. thaliana. New work studying polymorphism at these loci found strikingly low diversity at one of them, suggesting that spread of a mutation in this gene might have caused self-compatibility in an ancestor of A. thaliana.((1)) However, it is difficult to be sure of the time when the selfing habit evolved in the lineage that led to A. thaliana.
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