Plant Soil Environ., 2003, 49(6):261-268 | DOI: 10.17221/4123-PSE

Comparison of quality parameters of Czech and foreign hop varieties

K. Krofta
Hop Research Institute Co., Ltd, ®atec, Czech Republic

Market varieties of hops are classified to several groups according to their use in the brewing industry - aroma, bitter (dual-purpose), high-alpha ones. Saaz and other genetically related varieties form a separate group among the aromatic hops. The group called fine aroma hops has a low content of a-bitter acids (3-4% w/w), its content of b-bitter acids is in the range of 4-7% w/w and cohumulone ratio in the interval of 23-26% rel. The composition of hop oils is characterised by the content of b-farnesene in the range of 15-20% rel. and trans-a-bergamotene at the amount of ca. 1% rel. Most market varieties of hops are of hybrid origin. It holds true about the Czech varieties Sládek, Bor, Premiant and Agnus. The content of a-bitter acids in bitter varieties is in the range of 7-10% w/w while the content of a-bitter acids in high-alpha hops is higher than 10% w/w.

Keywords: hop varieties; hop resins; hop oils; a-bitter acids; b-bitter acids

Published: June 30, 2003  Show citation

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Krofta K. Comparison of quality parameters of Czech and foreign hop varieties. Plant Soil Environ. 2003;49(6):261-268. doi: 10.17221/4123-PSE.
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