Effects of cultivar and environment on beta-(1,3)-(1,4)-D-glucan content and acid extract viscosity of Spanish barleys
1996
Perez-Vendrell, A.M. | Brufau, J. | Molina-Cano, J.L. | Francesch, M. | Guasch, J.
The acid extract viscosities and beta-glucan contents of ten two- and six-rowed barley cultivars grown at seven locations in three consecutive years in Spain were studied in the present work. The viscosities varied from 2.4 to 24.8 centistokes (cSt) and the mean value was 6.4 cSt. The average beta-glucan content of barleys determined by HPLC was 3.5% with a range of 1.9-5.5%. Significant differences were found in both beta-glucan content and acid extract viscosity between different cultivars, locations and years. The beta-glucan contents and viscosities of winter cultivars were higher than those of spring. Cvs. Barbarrosa and Hatif de Grignon were the genotypes with the highest values for both parameters, while cv. Beka had the lowest viscosity and beta-glucan content. Environmental factors influenced both parameters. The acid extract viscosities of barleys were correlated negatively with the amount of precipitation (r= - 0.754; P<0.05). Barleys grown in wet and rainy areas (Girona and La Coruna) had lower viscosity values.
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