بررسي تنوع موجود ميان ژنوتيپهاي مختلف گل محمدي )ROSA DAMASCENA MILL( از نظر ريشه زايي قلمه و رشد نهال در كردستان

Study of cutting rhizogenesis and sapling growth variation in Rosa damascena genotypes in Kurdistan.

In order to determine genetic variation among 38 genotypes of Damask rose (Rosa damscena Mill.) for cutting rhizogenesis, sapling establishment and growth components, a study was carried out based on a completely randomized design (CRD) in Kurdistan. The genotypes were cut in March 2004 and planted in greenhouse environnment and data were recorded in Aug of the same year. Significant differences (cx<0.01) were detected among genotypes for different characteristics including rooted cutting percentage, primary branch number, average height of sapling, average leaf number per branch, average leaflets number per leaf, main branch diameter, the exit point of main branch and sapling vigor, as the suitable factors selection factors for breeding. Mean comparison showed that genotypes 22, 38 and 39 were better than others for all characteristics. Sapling height showed significant (a<0.01) positive correlations with rooted cutting percentage, primary branch number, leaf number per branch, leaflet number per leaf and main branch diameter. Also main branch diameter showed posetive and significant (a<0.01) correlation with primary branch number, average height of sapling and average leaf number per branch. The result of cluster analysis showed that the first and final steps of pooling of genotypes carried out in 98.68% and 51.27% respectively, and it was concluded that for similar researches in the future, 13 indicator genotypes could be used, instead of 38 genotypes.