Journal of Crop Breeding

Recogniting the genetic diversity and classification of inheritancepools is one of important activities in the field of breeding and maintaining genetic resources in plants. In order to assess the genetic diversity in 48 genotypes of soybean amplification of gene loci was performed by using 10 ISSR primers In Genetics and Plant Breeding laboratory, College of Agriculture andNatural Resources, University of gonbad Kavos.Among 68 amplifed fragment of caltivars were generated, 34 fragments were ploymorphic.The number of polymorphic bands per primer varied from 2 to 5 and the most of polymorphic bands was related to PRI-4. Pic values varied between 0.147 to 0.058 and the marker indexwasbetween 8.39 to 1.56, for primers. The highest and lowest percentage of polymorphic belonged to primer PRI-2 (66.66) and primer PRI-5 (28.57). Primer PRI-5 showed the maximum value of Shanon index (0.678) and primer PRI-1 had the lowest Shanon index with a value of 0.467. The greatest amount of genetic variation was observed in primer PRI-5 with value of 0.485 and the lowest genetic diversity in primer PRI-1 with value 0.3. The highest number of effective alleles obtained for primer PRI-5 with a value of 1.943 and a minimal number of effective allels for primer PRI-1 with a value of 1.479. Maximum level ofmarker index obtained forprimer PRI-6 with value of 8.39 which indicating a higher resolution of this primer than the otherand the lowest was observed in primer PRI-5 with a value of 1.65. Culaster analysis method UPGAM and jacards similarity coefficient grouped 48 genotypes in four separate groups.The result showed ISSR marker is amarker system for detecion of high levels of polymorphism and can be usedto investigation genetic diversity and breeding program in soybean.