Activity and concentration of polyphenolic antioxidants and agronomic characteristics of selected cultivars and advanced apple lines from Quebec and British Columbia, Canada.

Damm, A., Charles, M.T., Gondet, L., Hampson, C.R., Dubé, C., and Khanizadeh, S. (2013). "Activity and concentration of polyphenolic antioxidants and agronomic characteristics of selected cultivars and advanced apple lines from Quebec and British Columbia, Canada.", Journal of Food, Agriculture & Environment (JFAE), 11(3&4), pp. 834-843.

Abstract

Agronomic characteristics, total phenolic content (TPC) and total antioxidant (TA) activity were determined in the flesh and peel of eight selected apple genotypes from Canada, namely seven from Quebec (‘SJC658’, ‘SJC82341’, ‘A15R5A15A’, ‘A15R5A15B’, ‘Diva’, ‘Eden’, and ‘Reinette Russet’) and one from British Columbia (‘11W-19-18’) intended for fresh market and processing. The agronomic characteristics differed significantly among the selected cultivars (cv.), reflecting their intended use. TPC was measured by the Folin-Ciocalteu method, total antioxidant capacity (TAC) by the ferric reducing/antioxidant power (FRAP) and oxygen radical absorbance capacity (ORAC) assays. The phenolic content (PC) and antioxidant capacity (AC) were found to be higher in the peel for all cv. and breeding lines. ‘Eden’ had the lowest PC and AC while ‘Reinette Russet’ and ‘SJC658’ had the highest PC in both the flesh and the peel. A significant positive correlation was found between the TPC and the TAC measured by the two different methods. A significant correlation (r = 0.810) was also found between the FRAP and ORAC measurements, showing that these methods give consistent results. The significant variation observed in the agronomic and antioxidant parameters confirms the potential of some of the unnamed lines for processing, use in a breeding program, or both.

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