Figure 1. PCR-RFLP results on poly acryl amide gel (8%).RR; homozygote genotype for R577, shows two bands (205 and 85 bp) after digestion by Dde1.XX; homozygote genotype for X577, whit three bands (85, 97 and 108 bp). RX, heterozygote genotype, distinguished by 4 bands (85, 97,108 and 205bp).