Figure B2.

(A and C) Exact (solid lines) and approximate (dashed lines, from Equation 9) values of the transient excess of between-population genetic diversity ΔH_b, as a function of the strength of migration (M) and mutation (θ). In both A and C, the exact and approximate values of ΔH_b are very close. (B and D) Absolute error when using Equation A9 to approximate ΔH_b, as a function of M and θ. The maximum absolute error is reached when M ≃ 1 and θ < 1, the absolute error is 0.09 for n = 2 (B), and 0.016 for n = 20 (D). Equation 9 is a good approximation for ΔH_b whatever the parameter values of θ, M, and n considered.