Fig. 1. A: Distribution of the number of alleles detected at 100 RFLP loci in the USA (filled rectangles; n = 125) and world (open rectangles; n = 111) collections; B: Distribution of the number of alleles detected at 60 SSR loci in the USA (filled rectangles; n = 125) and world (open rectangles; n = 111) collections; C: Distribution of PIC values estimated for the 100 RFLP loci in the U.S. and world collections; D: Distribution of PIC values estimated for the 60 SSR loci in the U.S. and world collections.