Relations between flower yield and its components in 10 genotypes of damask rose in Golpayegan

To evaluate the flower performance and its components in terms of morphological traits, 10 genotypes of damask rose (Rosa damascena Mill.), have been cultivated in randomized complete blocks with three replications in a research field in Golpayegan city and studied in 2013. The results of means comparisons showed that for yield per plant, Yazd2 and Khuzestan genotypes had the highest and lowest value, respectively. Esfahan4 genotype was the superior for oil yield/hec. Significant correlations were observed between the characteristics. Positive and significant correlation between plant height and number of flowers with yield per plant were the most important. The results showed significant differences among genotypes for all evaluated traits, but for the qualities of essential oils and petals of the flower weight ratio. In cluster Analysis, the studied genotypes were divided into four groups.