Kvasný průmysl (Jun 2007)
Selected malting parameters of new accessions from the collection of spring barley genetic resources.
Abstract
The study evaluates selected parameters of grain and malt of new accessions from the Collection of Genetic Resources of Spring Barley maintained at the Agricultural Research Institute Kroměříž, Ltd. over 2003-2005. The results of evaluation of 113 varieties from differentiated regions of the origin confirmed the highest malting quality of the set of varieties from Western and Central Europe with orientation to the selection of materials with high content of fermentable substances. They also pointed to progress in breeding malting barleys achieved in countries of North Europe (Sweden and Denmark). Some Czech varieties, specially bred for use in production of a so-called "Czech Beer", were characterized by lower values of apparent final attenuation. Classification of varieties with a different type of hull percentage of a grain and type of ear was connected with high variability of indicators of grain modification, color of malt and wort turbidity. Significant differences in values of friability and beta-glucans in malt were found between the hulled and hulless varieties, the highest values of turbidity and color of malt were measured in the German hulless variety Lawina. For our growing conditions the least suitable varieties were the varieties from Eastern Europe (first of all Russia and Latvia) which except higher starch content did not excel in any required malting parameters or economically significant characters.The study evaluates selected parameters of grain and malt of new accessions from the Collection of Genetic Resources of Spring Barley maintained at the Agricultural Research Institute Kroměříž, Ltd. over 2003-2005. The results of evaluation of 113 varieties from differentiated regions of the origin confirmed the highest malting quality of the set of varieties from Western and Central Europe with orientation to the selection of materials with high content of fermentable substances. They also pointed to progress in breeding malting barleys achieved in countries of North Europe (Sweden and Denmark). Some Czech varieties, specially bred for use in production of a so-called "Czech Beer", were characterized by lower values of apparent final attenuation. Classification of varieties with a different type of hull percentage of a grain and type of ear was connected with high variability of indicators of grain modification, color of malt and wort turbidity. Significant differences in values of friability and beta-glucans in malt were found between the hulled and hulless varieties, the highest values of turbidity and color of malt were measured in the German hulless variety Lawina. For our growing conditions the least suitable varieties were the varieties from Eastern Europe (first of all Russia and Latvia) which except higher starch content did not excel in any required malting parameters or economically significant characters.
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