大麦的基因型和环境变异限制了糊精酶活性及其与麦芽品质的关系。
Genotypic and environmental variation in barley limit dextrinase activity and its relation to malt quality.
作者信息
Wang Xu-dong, Yang Juan, Zhang Guo-ping
机构信息
Department of Agronomy, Zhejiang University, Hangzhou 310029, China.
出版信息
J Zhejiang Univ Sci B. 2006 May;7(5):386-92. doi: 10.1631/jzus.2006.B0386.
Variation in the limit dextrinase activity of barley malt, and the relationships between limit dextrinase activity and malt quality parameters were investigated using eight cultivars grown at seven diverse locations in China for two successive years. Limit dextrinase activity varied with genotype and location, with the levels ranging from 0.245 U/g to 0.980 U/g. The results showed that the variation in limit dextrinase activity was more attributable to the environment (location and year) than to the genotype. The response of limit dextrinase activity to the environment differed markedly among cultivars, and was reflected by large difference in coefficient of variation of cultivars across diverse locations. Regression analysis showed that limit dextrinase activity was negatively correlated with malt viscosity (r=-0.52, P<0.01), positively correlated with Kolbach index (r=0.38, P<0.01) and malt extract (r=0.30, P<0.05), but had no significant correlation with malt protein content and diastatic power.
连续两年在中国七个不同地点种植的八个大麦品种用于研究大麦麦芽中极限糊精酶活性的变化，以及极限糊精酶活性与麦芽品质参数之间的关系。极限糊精酶活性随基因型和地点而变化，水平范围为0.245 U/g至0.980 U/g。结果表明，极限糊精酶活性的变化更多归因于环境（地点和年份）而非基因型。极限糊精酶活性对环境的响应在不同品种间差异显著，并通过不同地点品种变异系数的巨大差异得以体现。回归分析表明，极限糊精酶活性与麦芽粘度呈负相关（r=-0.52，P<0.01），与库尔巴哈值呈正相关（r=0.38，P<0.01）以及与麦芽浸出率呈正相关（r=0.30，P<0.05），但与麦芽蛋白质含量和糖化力无显著相关性。
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