Table 2 Amount of pollen grains produced in a population at equilibrium with a two-fold relative fertility advantage for males and five self-incompatibility alleles, the fifth allele (denoted S1Am) causing dominant female-sterility. In this case, the equilibrium frequency of males is 0.5. Half of the S2 pollen grains are produced by hermaphrodites (3 × 1/24), half are produced by males (1/8). All S1Am pollen grains are produced by males
