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In many hermaphroditic flowering plants, self‐fertilization is prevented by self‐incompatibility (SI), often controlled by a single locus, the S‐locus. In single isolated populations, the maintenance of SI depends chiefly on inbreeding depression and the number of SI alleles at the S‐locus. In subdivided populations, however, population subdivision has complicated effects on both the number of SI...
A longstanding hypothesis (“Baker's rule”) is that plant invasiveness is facilitated by floral self compatibility rather than self incompatibility. Extending this idea, invasive species whose individuals vary in degree of self compatibility within the native range might be self compatible in invading or weedy populations, due to natural selection on the mating system. We compared mating system between...
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