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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Theor Popul Biol. 2011 Jun 21;80(2):121–131. doi: 10.1016/j.tpb.2011.06.003

Figure 2.

Figure 2

Relative reproductive rate (5) induced at a neutral marker locus by purifying selection (σ = 0.80, τ = 0.77) at a Type 1 equilibrium under various levels of gene flow. For a given rate of crossing-over between the target of selection and the marker locus (r), the points correspond to an equally-spaced sequence of migration rates from m = 0 to m = 0.11 (beyond which the Type 1 equilibrium fuses with the Type 2 equilibria and becomes unstable). Relative reproductive rate (5) induced at the marker locus (ω) increases with the Euclidean distance of the stable Type 1 equilibrium from the fixation state (‖(x1,x2)−(1,0)‖=(1−x1)2. For very small backward migration rates (m → 0), the vertical sequence of the leftmost points is very similar to (12), the “gene flow factor” of Bengtsson (1985).