evaluation of genetic variation of some grape cultivars based on morphological traits

this research was conducted to study morphological and evaluation of genetic diversity of 15 grape cultivars in collections of agriculture and natural resources, research center of khorasan razavi based on completely randomized design with four replications. results showed extensive range of variations among cultivars and measured traits. in some key traits of tests for distinctness uniformity and stability descriptor including density of prostrate hairs between main veins on lower side of blade, density of erect hairs on main veins on lower side of blade and blistering of upper side of blade in mature leaf, anthocyanin coloration of main veins on upper side of blade surface, density of prostrate hairs on the shoot tip in young shoot and color of upper side of blade in young leaf, showed highest diversity coefficient, that is more diversity among studied grape cultivars. the results of correlation coefficients showed positive and significant correlation among some important traits in cultivars breakdown and distinctness. the cluster analysis was done based on all measured traits with ward method, finally in distance 5, the cultivars were classified to four groups. the cultivar of keshmeshi bidaneh ghochan located in separate group, and in among some cultivars of other groups were rather high similarity. results showed high diversity of key traits and in terms of uniformity and stability were able to breakdown and distinctness cultivars. therefore to reason of cultivars evaluation in similar qualification, may have selection based on studied traits.