Statistical analysis was conducted with the program Statgraphics Plus 4.0 (Statgraphics, Herndon, VA). Oneway analysis of variance was used for analysis of the effect of cultivar on the content of sugars, acids, phenolics, etc. Differences between cultivars were estimated with the HSD test (p < 0.05). Linear regression was performed between measured variables. Correlations were tested at p 6 0.05.