Fruit Anthocyanin Content of Some Euvitis × Vitis rotundifolia Hybrids

Abstract

The anthocyanin (Acy) content of 12 Euvitis × Vitis rotundifolia hybrids, 3 V. vinifera L., one V. × labruscana, and one V. rotundifolia Michx. clone were analyzed by high performance liquid chromatography (HPLC) techniques. All intersubgeneric hybrids contained mono- and diglucoside Acy, and all but one produced acylated Acy. A total of 40 pigments was separated, with ‘Concord’ having the most at 31. An additional unidentified pigment was detected in ‘Noble’. Sufficient variation was present in the hybrids for selection of genotypes that would improve color of wines. Relative Acy content (percentage of total) in the hybrids ranged from 2.3% to 44.3% for malvidins, 0.7% to 30.3% for petunidins, 0.8% to 69.2% for peonidins, 0.0% to 17.2% for cyanidins, and 0.5% to 52.3% for delphinidins. Relative content of acylated Acy forms in the hybrids ranged from 0.0% to 51.1%. Total Euvitis-type pigmentation (monoglucoside plus acylated Acy) in the hybrids ranged from 19.5% to 55.0%.