Effect of genotype, environment and agronomic management on b-glucan concentration of naked barley grain intended for human health food use.

Dickin, E.T., Steele, K.A., Frost, G., Edwards-Jones, G. and Wright, D. (2011) Effect of genotype, environment and agronomic management on b-glucan concentration of naked barley grain intended for human health food use. Journal of Cereal Science, 54 (1). pp. 44-52.

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Abstract

(1,3:1,4)-beta-D-Glucan is an important bioactive that contributes to the ability of barley foods to help prevent type-2 diabetes. Realisation of these benefits requires understanding of genotype and environment effects on beta-glucan concentration and how this variation affects biological activity of barley foods. Field experiments showed genetic variation in beta-glucan concentration (3.0-7.0 g/100 g DM), but also considerable variation between environments. beta-Glucan concentrations were lower in the wet summer of 2007 than 2006 or 2009; and slightly less in the dry summer of 2006 than 2009. beta-Glucan was not diluted by higher grain yields. The role of beta-glucan as an assimilate buffer adds complexity to interpreting the effects of environment during grain filling. Autumn sowing and fungicide increased the duration of grain filling, decreased beta-glucan concentration but increased environmental stability; possibly due to lower demand for assimilate buffering. Lodging and foliar disease decreased beta-glucan concentration, by decreasing assimilate supply leading to remobilisation of carbohydrate from beta-glucan, so that fungicide increased beta-glucan in some disease-susceptible accessions. Sequential harvesting starting at GS 91 suggested an optimum harvest window for maximum beta-glucan concentration. The variability in beta-glucan reported here between genotypes and environments was sufficient to affect control of post-prandial blood glucose in healthy volunteers.

Item Type: Article
Divisions: Crop and Environment Sciences
Depositing User: Mr Darren Roberts
Date Deposited: 08 Aug 2018 15:12
Last Modified: 08 Aug 2018 15:12
URI: http://hau.repository.guildhe.ac.uk/id/eprint/16871

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