Fifty-six rice genotypes were investigated using RAPD marker (Random Amplified Polymorphic DNA). In the experiment 66 primers were used. The results indicated that 12 Random primers produce suitable polymorphism. 129 random markers were shown in which 104 were polymorphic (80.62%) while 25 were monomorphic (19.38%). The size of generated bands was from 0.45 to 3 Kb. The average band number for each polymorphic primer was estimated from 7 to 10.75. Genotype clustering was done using UPGMA method and Jacard similarity coeffient. The investigated population (genotypes) stood in 7 groups. Similarity among varities varied from 44 to 91%. Minimum similarity estimated was between Boofican and Domsiah varities while maximum belonged to IR28 and Amol-2. The results showed that there exists enough suitable diversity among varities that can be used for different purposes in rice breeding programs. Furthermore the results indicated that RAPD marker is a suitable technique for classification as well as investication in rice varities .
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