Figure 4.

Change of fitness during the first three generations of selfing diploid and tetraploid populations in equilibrium (assuming a mutation rate of 10⁻⁶, random mating, and a deleterious allele lethal to homozygous sporophytes and double reduction rates α = 0, 0.04, and 0.17). The inbreeding coefficient F_i is obtained from the recurrence relations F_i = (1 + F_i−1)/2 and F_i = (1 + 2α + (5 − 2α)F_i−1)/6 for the diploid and the tetraploid populations, respectively (where i represents the number of generations of selfing and α the is rate of double reduction) (51). At generation 0 we stipulate an inbreeding coefficient of 0 and a fitness of 1.