Authors:V. Psota, E. Lukšíčková, J. Ehrenbergerová, and J. Hartmann
The occurrence of damaged grains was studied in 12 barley genotypes in a three-year period. The occurrence of grains with physiological split of lemma and endosperm was generally low. Split of palea and endosperm was mostly affected by the genotype (10%) and it was recorded most frequently in the genotype Heris. Incomplete overlapping of husks was also markedly affected by the genotype (10%) and it occurred most frequently in the genotype Scarlett. Sprouted grains and grains of green color occurred minimally. Black points were affected by year (21%) and genotype (15%). This damage was most frequently reported for the genotypes Camera and Jersey. Surprisingly, the occurrence of grains with apparently moldy husks was markedly affected by the genotype (25%), less substantially by the location (10%) and minimally by year (3%).
Authors:K. Vejražka, V. Psota, J. Ehrenbergerova, and P. Hrstkova
The study presents results of the research on the use of barley caryopses hardness for description and prediction of the malting quality. In 2001–2003, twelve barley varieties from three localities were analyzed. The content of protein, starch and non-starch polysaccharides was assessed in all grain samples. Grain hardness was determined using a modified grain milling energy method (GME). Subsequently, the samples were micromalted, and the selected quality parameters were established.Statistically significant differences in the level of hardness between the varieties were found. However, the effect of locality and growing year was not proven. Share of a variety in the total variability of hardness reached nearly 47%. Correlations between the level of hardness and the selected quality parameters of barley and malt were calculated. Hardness values, such as the correlations with the malt extract (−0.29**), the Kolbach index (−0.33**), friability (−0.48**),
-glucan content in wort (0.43**),
-glucan content in grain (0.53**) and malting quality index (MQI) (−0.42**) were established.