Comparison of the Studied Morphological, Yield and Essential oil Traits of Rosa damascena in Kermanshah Province

Rosa damascena Mill from the Rosaceae family plays an important role in the perfume and rose making industries in the Iran and the World. The aim of this study that was performed at Islamabad-e-Gharb Research Station in Kermanshah province was selection of adaptive and elite genotypes. The research was conducted in the form of a complete randomized block design with 3 replications for 5 years (2012-2016).The results showed that the average dry weight of petals in different Accsessions include: Fars 1, West Azerbaijan 1, Lorestan 1 and Kermanshah 9 genotypes was highest and in contrast, in Isfahan 5, Isfahan 7 and Kermanshah 10 genotypes, was lowest. Compare the average of the studied traits of different accessions such as average dry weight of flowers, wet weight of flowers, dry weight of petals, wet weight of petals, average small and large diameter, average plant height and average number of flowers showed varies in different genotypes. Statistical analysis of the inter Accsessions of two factors of year and genotype also showed that except two chemical compounds of essential oil (y-elemene and a-cadinene); other compounds had a significant difference (statistical level of 1% and 5%).