Histogram of the ratio Vg(i)/Vip(i). (a)The variances Vg(i) and Vip(i) and their ratio were computed for each gene i, in the same manner as that adopted in Figure 2. Histogram of the was computed and sampled for all genes i from 280 to 300 generations. σ = .001 (red +), .02 (green x), .03(blue *), .05(pink ▢), and .08(sky blue *) and .1 (black ○). (b) Temporal evolution of the histogram for the ratio Vg(i)/Vip(i) for σ = 0.1. The histogram was computed over all networks and for every 20 generations. We used the logarithmic scales for both axes, so that the values for abscissa shows : The histograms over generations 1-20, 21-40, 41-60,101-120, 181-200, and 281-300 were plotted with a different color for each network. With evolution, a peak was formed at Vg(i)/Vip(i) = ρ ~ 10-2.3. See Method for the choice of the parameters.
Kaneko BMC Evolutionary Biology 2011 11:27 doi:10.1186/1471-2148-11-27