The Persian walnut (Juglans regia L.) is one of the most valuable resources in Iran because of
its multi benefits. The present study was conducted in Meshkin-Shahr in Ardabil province to
investigate the important quantitative and qualitative characteristics of 31 walnut genotypes.
Classification of genotypes was analyzed using the cluster method. The results showed that
among selected walnut genotypes, SS genotype had the highest kernel weight (7.03 g), and
fruits weight (12.65 g), and RM3 had the best kernel percentage 63.73%. The walnut
genotypes were clustered into three groups using UPGMA cluster method. This preliminary
study demonstrated that quantitative and qualitative characteristics were effective in evaluating
the genetic diversity of walnut genotypes.
