Summary statistics calculated for each population (12 SL, Var2 and Var6), for each group and sub-group (SL and VAR, SL90 and SL99,) and for the whole sample.

The SL population codes are in Table 1.

S, sample size; na, mean number of observed alleles per locus; ne, mean number of expected alleles per locus; I, Shannon’s information index; Ho, observed heterozygosity; He, expected heterozygosity; Rs, allelic richness; Fis, intra-population fixation index.