Figure 2.

Effect of domestication on the average population fitness. The fitness drop corresponds to the switch in the optimal gene expressions at the onset of domestication (selection switch, red triangle). The population bottleneck is indicated as a thick horizontal segment. Three scenarios were considered: a full maize domestication scenario with selection switch and bottleneck (Default, plain line); a scenario without bottleneck (hyphenated line); a scenario with a bottleneck but constant selection (no switch, dotted line). The figure shows the average over 1000 simulations for each scenario.