title: Evolution: an exception that proves the rule.
abstract: A careful comparative analysis suggests a simple explanation for a category of exceptions to the general correlation between separate sexes in plants -- dioecy -- and self-incompatibility. In some genera, polyploidy causes failure of self-incompatibility, and dioecy may then evolve.
authors.affiliation: Institute of Cell, Animal and Population Biology, University of Edinburgh, Ashworth Laboratory, King's Buildings, W. Mains Road, Edinburgh EH9 3JT, UK.
authors.forename: D
authors.initials: D
authors.lastname: Charlesworth
mesh_terms: D005075:Biological Evolution; D010944:Plants / Q000235:genetics*