Figure 2. Lack of concordance in allelic richness between microsatellite loci and the sex-determination locus rule out a ‘lagged’ invasion scenario.

In simulated founder populations of 100 bees, average allelic richness at the microsatellite loci (black squares) declined at a faster rate during the lag period when compared to the sex-determination locus initialized with either 9 (open squares) or 20 (open triangles) alleles. Average allelic richness at the microsatellite loci was transiently concordant only with that of the sex-determination locus at 9 alleles-much higher than observed in the introduced L. leucozonium population where both types of loci had ∼3 alleles.