Ampelographic characterization of Vitis cv "Prokupac" clones by multivariate analysis

Abstract

Twenty-five Prokupac clones were included in the research. The aim of this study was to: examine the variability of morphological traits within the clone collection, calculate the correlation among characteristics, detect associations among clones, identify the most useful variables for discrimination among clones and recommend clones suitable for further exploitation. Statistical analysis was performed based on the average values obtained from a three year long period. Relationship among the traits was presented with a correlation analysis which was done by using Pearson correlation coefficients. Cluster analysis was performed by applying Ward's method and Euclidean distances. The overall mean values showed high level of morphological variability. The highest level of variation was found in the number of berry seeds. Based on cluster analysis clones divided into three clusters I, II and III which include 7, 12 and 6 clones, respectively. Maximum Euclidean distance was observed between the clones 42/2 and 43/8, and minimum distance was observed between the clones 40/8 and 43/7. Parameters with high discriminating values were those related to bunch and berry size and structure. Most clones are perspective for further investigation and vine production, clones 40/4, 41/1 and 43/8 have large bunches and can be recommended as consummation grape.