Determination of gushing potential of barley
2021
Natálie Belcredi Březinová (Department of Crop Science, Breeding and Plant Medicine, Mendel University in Brno Zemědělská 1, 613 00 Brno, Czech Republic) | Rastislav Boško (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic; Department of Crop Science, Breeding and Plant Medicine, Mendel University in Brno Zemědělská 1, 613 00 Brno, Czech Republic) | Marek Pernica (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic) | Sylvie Běláková (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic) | Tomáš Foltýn (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic) | Zdeněk Svoboda (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic) | Karolína Benešová (Research Institute of Brewing and Malting, Mostecká 7, 614 00 Brno, Czech Republic)
A new control method for the determination of the malting barley susceptibility to gushing was developed. The method is based on the modified Carlsberg test (MCT) after prior stimulation of barley with substances that promote the germination process. Barleys from the harvest of 2020 and malts produced from them were used to develop and verify the method. The selection of barleys was based on the results of gushing potential detected in the produced malts. To optimise and verify the method, the barley variety Sunshine with a high gushing potential of both barley (139±33 g) and malt (144±13 g), and the barley variety Pionier with zero gushing potential of both barley and malt were used. Malt was produced from the Lodestar barley variety with a high content of the mycotoxin deoxynivalenol. Gushing of the malt was 127±10 g. The gushing potential in barley was determined by the MCT method after prior stimulation of germination. For comparison, the gushing potential was also determined by the MCT method without stimulation of germination. It was proved that stimulation of germination is a key process for correct determination of the susceptibility of barley to gushing. The newly developed method was used for the determination of the gushing potential of five barleys from the harvests of 2020 and 2021. Control gushing determination of five malt samples was performed using the MCT method. An agreement between the measured data was found.
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