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Effects of genotype and environment on free amino acid levels in wheat grain:implications for acrylamide formation during processing

Curtis, Tanya Y. and Muttucumaru, Nira and Shewry, Peter R. and Parry, Martin A J and Powers, Stephen J. and Elmore, J. Stephen and Mottram, Donald S. and Hook, Simon and Halford, Nigel G. (2009) Effects of genotype and environment on free amino acid levels in wheat grain:implications for acrylamide formation during processing. Journal of Agricultural and Food Chemistry, 57 (3). pp. 1013-1021. ISSN 0021-8561

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Abstract

Acrylamide forms from free asparagine and reducing sugars during cooking, with asparagine concentration being the key parameter determining the formation in foods produced from wheat flour. In this study free amino acid concentrations were measured in the grain of varieties Spark and Rialto and four doubled haploid lines from a Spark x Rialto mapping population. The parental and doubled haploid lines had differing levels of total free amino acids and free asparagine in the grain, with one line consistently being lower than either parent for both of these factors. Sulfur deprivation led to huge increases in the concentrations of free asparagine and glutamine, and canonical variate analysis showed clear separation of the grain samples as a result of treatment (environment, E) and genotype (G) and provided evidence of G x E interactions. Low grain sulfur and high free asparagine concentration were closely associated with increased risk of acrylamide formation. G, E, and G x E effects were also evident in grain from six varieties of wheat grown at field locations around the United Kingdom in 2006 and 2007. The data indicate that progress in reducing the risk of acrylamide formation in processed wheat products could be made immediately through the selection and cultivation of low grain asparagine varieties and that further genetically driven improvements should be achievable. However, genotypes that are selected should also be tested under a range of environmental conditions. © 2009 American Chemical Society.

Item Type: Article
Journal or Publication Title: Journal of Agricultural and Food Chemistry
Uncontrolled Keywords: Acrylamide ; Asparagine ; Food contaminants ; Plant breeding ; Sulfur fertilization ; Triticum aestivum ; Wheat
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 75993
Deposited By: ep_importer_pure
Deposited On: 21 Oct 2015 06:03
Refereed?: Yes
Published?: Published
Last Modified: 22 Nov 2017 23:33
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/75993

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