Cultivar and environmental effects on (1 to 3, 1 to 4)-beta-D-glucan and protein content in malting barley
2001
Zhang, G. | Chen, J. | Wang, J. | Ding, S.
A low beta-glucan and protein content is desirable for malting barley. In China high beta-glucan content has been considered a major factor contributing to the inferior malting quality of local barleys. In this study 10 barley cultivars were planted in multi-location trials in the southern winter-barley zone to determine genotypic and environmental effects on beta-glucan and protein content. There were highly significant differences in both beta-glucan and protein content between the 10 barleys, the eight locations and the 2 planting years. The average beta-glucan content over the 2 years for the 10 cultivars in the eight locations ranged from 3.91% for Gangpi 1 to 4.95% for Xiumei 3, and from 3.76% for Hangzhou to 4.75% for Taian in eight locations. Correspondingly, the protein contents of the 10 cultivars ranged from 11.37% for Yanyin 1 to 12.52% for ZAU, and of the eight locations from 9.5% for Hangzhou to 14.69% for Taian. Environmental factors contributed the largest component of the variation in both beta-glucan and protein content. Five climatic factors, namely the total accumulated temperature, accumulated temperature to 25 degrees C and to 30 degrees C, precipitation and days with rain during seed development were included in a regression equation relating climatic factors and beta-glucan content. In the regression equation relating climatic factors and protein content, two other factors, days from heading to maturity and accumulated temperature to 20 degrees C were included, in addition to the five climatic factors that significantly affected beta-glucan content.
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