Figure 3

Linkage disequilibrium and chromosomal gametic disequilibrium as a function of the frequency of the A₂ allele during the course of selection of the epistatic gene combination. Selection parameters, mutation rate and meiotic parameters are the same as in Figure 2, with the recombination rate equal to 0.5. Part (a) corresponds to an autotetraploid population that is not experiencing double reduction, (b) an autotetraploid population that is experiencing double reduction and (c) an autotetraploid population that conforms to the gamete pool model in which chromosomal gametic disequilibrium is not possible. Gray curve—linkage disequilibrium. Black curve—disequilibrium of A₁B₂/A₂B₁ gamete. Long-dashed curve—disequilibrium of A₁B₁/A₂B₂ gamete. Dot-dashed—disequilibrium of A₁B₂/A₂B₂ gamete. Short-dashed—disequilibrium of A₂B₂/A₂B₂ gamete.