Fig. 1. Mean levels of genetic variation in Northern Flint (NF), Southern Dent (SD), Corn Belt Dent (CBD), and inbred lines at 43 simple sequence repeat (SSR) loci: (a) allele number, (b) expected heterozygosity, and (c) inbreeding coefficient. Circle = NF/SD; diamond = CBD; x = inbred. The simple sequence repeat (SSR) loci are listed in chromosomal order and their numbers can be associated with the SSR locus in Table 3.