The tree growth effect on fertility and fruit quality traits in 'Oblicinska' sour cherry genotypes

The goal of this study was to examine the variability and correlation between vigor, yield and fruit quality components in 'Oblačinska' sour cherry. Plant material used in this trial comprised of 41 genotypes, while the experiment was done in three consecutive years. An important diversity has been found in the set of evaluated genotypes and significant differences were found among them in most traits studied. Observed differences between years of study for almost all examined traits, indicate a high influence of environmental conditions on these parameters. Also, significant positive or negative correlation were found between some properties. Principal component analysis (PCA) analysis suggested that leaf dimension, fruit weight, yield efficiency, vigor and fruit set could be sufficient for determination of genotypes. Cluster analysis (CA) grouped genotypes in two main clusters, with numerous sub-clusters. Genotypes with low tree growth and high yield potential were proved to be interesting for following breeding programs and cultivation.