The standard dimensionless matrix of the eleven parameters related to the polymorphism and discriminability of the 20 SSR loci evaluated by the TOPSIS method.

NB, NA, NE, NPA, PPA, NSA, PSA, PIC, I, H and DP represent the observed number of bands, the observed number of alleles, the mean value of effective alleles, the number of polymorphic alleles, the proportion of polymorphic alleles (%), the number of specific alleles, the proportion of specific alleles (%), the polymorphism information content, the mean Shannon's information index, the mean Nei's gene diversity index, and the discriminating power, respectively. Dj+, Dj− and Zi represent the distance between the Pi to the plus ideal solution, the distance between the Pi to the minus ideal solution, and the relative approach degree, respectively, which were calculated according to Boran et al [34] and Torfi et al [35].