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Genotype and Environmental Variation in Phenolic Content, Phenolic Acid Composition, and Antioxidant Activity of Hard Spring Wheat

Genotype and Environmental Variation in Phenolic Content, Phenolic Acid Composition, and Antioxidant Activity of Hard Spring Wheat,10.1021/jf052683d,J

Genotype and Environmental Variation in Phenolic Content, Phenolic Acid Composition, and Antioxidant Activity of Hard Spring Wheat   (Citations: 21)
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The health-promoting effects of whole-grain wheat likely derive from phenolic compounds and other antioxidants that also make wheat a potential source of functional food ingredients. The objective of this study was to determine the effects of genotype and growing environment on the phenolic contents and antioxidant activities of alcohol-soluble extracts from commercial wheat cultivars. Total phenolic contents (TPCs), antioxidant activities (AOAs), and concentrations of six phenolic acids were measured in six red- and white-grained hard spring wheat genotypes grown at four diverse locations in Western Canada during the 2003 crop year. There were significant differences among genotypes and environments for TPC, AOA, and concentrations of all the phenolic acids measured. The predominant indicators of antioxidant potential, i.e., TPC, AOA, and ferulic acid (FA) concentration were highly intercorrelated (r > 0.72). For these indices, the Canada Western (CW) Red Spring wheat cultivars Neepawa and AC Elsa had the highest levels, whereas an analogous CW hard white spring wheat cultivar, AC Snowbird, had the lowest levels. Grain color did not appear to be a factor in the expression of antioxidant-related parameters. For both TPC and AOA, as well as for vanillic acid, syringic acid, and ferulic acid, environmental effects were considerably larger than genotype effects. Neither growing temperature nor rainfall from anthesis to maturity appeared to be related to the environmental variation that was observed. Genotype environment interaction was small for all parameters compared with genotype and location effects and was significant only for TPC. Genotype variation for antioxidant properties indicates that it would be possible to select for these quantitative traits in a breeding program. However, the significant environmental variation observed would delay and/or complicate this process.
Journal: Journal of Agricultural and Food Chemistry - J AGR FOOD CHEM , vol. 54, no. 4, pp. 1265-1270, 2006
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    • ...Many factors such as solvent composition, extraction time, extraction temperature, solvent to solid ratio, pH, and particle size, among others, may significantly influence the extraction efficacy (Kim et al. 2006; Qu et al. 2005; Marama et al. 2004; Pinzino 1999; Mpofu et al. 2006; Li et al. 2005; Silva et al. 2007)...
    • ...The free phenolic content (FPC) (Kim et al. 2006) and lignans (Qu et al. 2005) in wheat bran; TPC, reducing power and DPPH in wheat and its fraction (Marama et al. 2004); carotenoid content in wheat grain (Pinzino 1999); DPPH in red and white wheat grain (Mpofu et al. 2006); TPC and DPPH in Chinese black grained wheat (Li et al. 2005) have been reported by the researchers...

    Barinderjit Singhet al. Optimization of extraction of antioxidants from wheat bran ( Triticum ...

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