Figure 5.

The proportion of pooled allele-frequency vectors that were significantly different from neutral according to the Ewens–Watterson test for neutrality as a function of gene flow for three different population sizes N and n > 1. The solid symbols indicate the results for populations with random drift whereas the open symbols indicate those without. Allele-frequency vectors were rejected if 18 or more of the generated sample homozygosity $\left(\widehat{F}\right)$ values were outside the critical range of Ewens sampling distribution (see text for explanation). Only combinations of N, m and n are shown for which at least 10 replicates were found.