Abstract
The study presents malting quality and agronomic characteristics obtained during testing of barley varieties in the Czech Republic. After the harvest of 2020, the following spring barley malting varieties were registered: Amidala, Focus, Greenway, KWS Jessie, LG Belcanto, and LG Stamgast. LG Stamgast was recommended for production of the beer with the protected geographical indication České pivo. In addition, the non-malting spring barley variety RGT Gagarin was registered. Amidala, Focus, Greenway, KWS Jessie, LG Belcanto provided malt with the extract content over 83%. These varieties also easily degraded nitrogenous substances. The value of the Kolbach index ranged from 48.6 to 52.1%. Diastatic power was at the optimal level. Degradation of cell walls was also optimal. Friability moved from 89 to 97% and β-glucan content in wort achieved satisfactory values of 65 – 170 mg/l in the given varieties . Wort quality, which is characterized by final attenuation, was at the above average to optimal level of 80.9 – 83.2% in these varieties of spring barley. LG Stamgast showed lower values of proteolytic and cytolytic modification and lower values of final attenuation, which is required for the varieties recommended for the production of the beer with the protected geographical indication České pivo.
Highlights
Between 2016 and 2020, an average of 1,128,000 tons of spring and 612,000 tons of winter barley were harvested in the Czech Republic annually
For the varieties recommended for the production of the beer with the protected geographical indication (PGI) “České pivo”, lower levels of proteolytic and cytolytic modification and lower levels of wort fermentation are required
RGT Gagarin was registered as a non-malting variety
Summary
Between 2016 and 2020, an average of 1,128,000 tons of spring and 612,000 tons of winter barley were harvested in the Czech Republic annually. In the Czech Republic, new barley varieties are registered under Act No 219/2003 Coll. According to this act, the varietal trials are performed by a state administration body, which is the Central Institute for Supervising and Testing in Agriculture (further only CISTA). CISTA performs field and laboratory tests to determine differences, uniformity, stability and utility value according to methodologies set by the ministry. A variety has a utility value if, in comparison with other registered varieties, in the sum of its characteristics, it represents, at least in one growing area, a clear benefit for cultivation or for its use or for products derived from them. Yield and other yield parameters, resistance to diseases, resistance to lodging and parameters characterizing malt quality are evaluated in the tests required for the registration of a new variety
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