A necessary condition for equilibrium in systems exhibiting self-incompatible mating.
D000483:Alleles; D002875:Chromosomes; D005260:Female; D005787:Gene Frequency; D005796:Genes; D005828:Genetics, Population; D005838:Genotype; D008297:Male; D010063:Ovum; D010944:Plants; D012098:Reproduction; D013094:Spermatozoa