study on phenotypic diversity of some grape (vitis vinifera l.) cultivars and genotypes using morphological traits in hamedan provence

comparison and grouping of 32 grape cultivars and genotypes by using 61 traits including; 5 phenological and vegetative characters, 41 traits related to fruit and amount of resveratrol in 15 parts of plant was done according to grape descriptor and related methods. according to the results some traits such as spikelet weight, berry color, length of peduncle, length of berry tail, weight and length of seed and amount of cis &trans-resveratrol; in seeds of ripe and unripe fruit had high coefficient of variation. simple correlation coefficients between traits indicated the existence of significant, positive as well as negative correlations among some important vegetative, bunch, berry and seed measured traits. cluster analysis at euclidean distance of 25, divided all cultivars and genotypes into two main branches and characters such as time of berry ripening, tendril density, thickness of berry skin, weight of spikelet peduncle, length of berry tail and amount of cis-resveratrol in berry were effective in separation of cultivars and genotypes. with decrease in the euclidean distance from 25 to 5, the cultivars and genotypes were divided into six main subclusters and traits such as growth vigor, bunch size, berry density in bunch, anthocyanin coloration of berry, tss, thickness of berry skin, ratio of bunch weight to spikelet weight, bunch length and ratio of bunch length to bunch width were important factor in separation of main clusters. based on the results, cultivars and genotypes including ‘kyoho’, ‘ahmad mowla'ii’, ‘aangoshte aros’, ‘keshmeshi sefid’, ‘keshmeshi ghermez’, ‘asgari’tehran’ and ‘genotype1-row1’ in some of the important traits such as late flowering habit, tss and storage, table grape and amount of protein and resveratrol were better than the other cultivars and genotypes.