Effect of Cultivar, Year Grown, and Cropping System on the Content of Tocopherols and Tocotrienols in Grains of Hulled and Hulless Barley |
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Authors: | J. Ehrenbergerová N. Belcrediová J. Prýma K. Vaculová C. W. Newman |
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Affiliation: | (1) Mendel University of Agriculture and Forestry, Brno, Czech Republic;(2) Research Institute of Brewing and Malting, PLC, Malting Institute, Brno, Czech Republic;(3) Agricultural Research Institute, Kroměříž, Ltd., Kroměříž, Czech Republic;(4) Montana State University, Bozeman, MT, USA |
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Abstract: | In a three-year period (2000–2002) total tocols (tocopherols and tocotrienols), content of vitamin E and its isomers (α-, β+γ-, δ-tocopherols and tocotrienols) were assessed in grain of 13 barley genotypes. The highest content of tocols (60.3–67.6 mg kg−1) and content of vitamin E (Vitamin E equivalent—18.0–20.1 mg kg−1) were determined in the waxy varieties Wanubet, Wabet, and Washonubet. Standard varieties, i.e. of a malting type (Krona and Kompakt), had statistically significantly lower content of tocols (49.9 and 53.6 mg kg−1) and vitamin E (15.7–16.1 mg kg−1) compared to the waxy varieties. The hulless waxy variety Washonubet had statistically significantly higher total content of tocols (67.6 mg kg−1) and α- tocotrienols isomer (42.1 mg kg−1) versus all other genotypes in the set. Chemical treatment and fertilization statistically significantly increased the content of tocols (by 4.7 mg kg−1), vitamin E (by 1.9 mg kg−1), isomer α-tocopherol (by 0.9 mg kg−1) and isomer α- tocotrienols (by 3.3 mg kg−1). The average values of α-tocopherols and α-tocotrienols in the set were 6.7 mg kg−1 and 29.7 mg kg−1, respectively. Some of the reciprocal lines created by us from the malting and waxy varieties are suitable for food use for high contents of all tocopherols and α-tocotrienols. |
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Keywords: | Spring barley Waxy barley Tocopherols Tocotrienols Cropping system |
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