Table S6. Specific alleles at each microsatellite locus within genetic cluster pairs.1 total allele observed at each locus. 2 alleles shared by at least two of the three clusters. a alleles observed in each cluster pairwise (clusters 1 vs. 3, 1 vs. 4 and 3 vs. 4). b specific alleles observed in each cluster pairwise (clusters 1 vs. 3, 1 vs. 4 and 3 vs. 4). c frequency of alleles based on the total number of alleles observed at the 25 SSR loci in the 207 apricot accessions studied. d frequency of specific alleles based on the total number of alleles detected at the 25 loci.