Genotypic and Environmental Variation in Grain Protein Components and their Relations to Beta-amylase and Beta-glucanase Activity in Malting Barley
Eight malting barley cultivars were used to investigate the cultivar and environmental effects on grain protein components and the relationships between protein fractions and β-amylase or β-glucanase activity. The results showed there was a great variation for three protein fraction (albumin, hordein and glutelin) contents over cultivars and locations, and a distinct difference in each protein fraction content between the locations for a given cultivars. Correlation analysis indicated that β-amylase activity was significantly correlated with three protein fraction contents and there was a negative correlation between glutelin content and β-amylase activity, but β-amylase activity positively correlated with albumin or hordein content. Furthermore, there was a significant positive correlation between total protein content and β-glucanase activity, and we found the hordein and glutelin content did not show correlated with β-glucanase activity but the albumin content was a significantly negative correlation with β-glucanase activity.
Keywordsbarley (Hordeum vulgare L.) protein content protein fraction beta-amylase beta-glucanase
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