O. Mayo et Cr. Leach, WHY ARE THERE SO FEW HOMOMORPHIC MULTILOCUS SPOROPHYTICALLY DETERMINED SELF-INCOMPATIBILITY SYSTEMS, Theoretical and Applied Genetics, 86(8), 1993, pp. 955-958
Homomorphic multi-locus sporophytically determined self-incompatibilit
y systems are much rarer than multi-locus gametophytic systems. This n
ote examines some of the possible reasons for this disparity and concl
udes that, while each additional locus in a gametophytic system allows
increased crossing among related plants as well as a lower mutation r
ate to maintain a given level of variability, the same conclusion cann
ot be drawn for sporophytic systems.