Figure 8.—
Simulation results of the proportion of nonfunctionalization finally occurring at the ancestor locus (fnon1) after segmental gene duplication in haploid vs. diploid populations with μ = 10−5. Asterisks and circles are simulation results for linked and unlinked gene duplication, respectively. Simulation results in subplot A are obtained under the DNR selective model in haploid populations with population sizes 2N; in subplot B results are obtained in diploid populations under the DNR selective model with population sizes N; in subplot C results are obtained in diploid populations under the HI selective model with population sizes N. In subplot C, when N > 40000 (or Nμ > 0.4), under the HI selective model nonfunctionalization for unlinked gene duplication is difficult to reach because of much prolonged time to nonfunctionalization. Simulation repeats 2000 times.