Figure 1.—

Frequency distribution of Tajima's D for n = 10 (blue) and n = 100 (red) for a frequency spectrum with an excess of alleles between 0.1 and 0.2. The distributions were obtained from simulations of an admixture of two populations (one single population split in two isolated at 0.2N_e generations from present, with N_e1 = 0.15N_e and N_e2 = 0.85N_e, and merged 8N_e generations later). A short period of high recombination values was used at the beginning (first 0.2N_e generations) to reduce the effect of discrete sampling from one or the other population, especially in the case of n = 10.