Essential oils in Czech hop varieties

Vladimír Nesvadba; Jana Olšovská; Lenka Straková; Jitka Charvátová; Sabina Trnková

doi:10.18832/kp2021.67.447

Authors

Vladimír Nesvadba Hop Research Institute Co., Ltd., Saaz, Kadaňská 2525, 438 01 Žatec, Czech Republic
Jana Olšovská Research Institute of Brewing and Malting, Lípová 15, 120 44 Prague, Czech Republic
Lenka Straková Mendel University in Brno, Faculty of AgriSciences, Zemědělská 1, 613 00 Brno, Czech Republic
Jitka Charvátová Hop Research Institute Co., Ltd., Saaz, Kadaňská 2525, 438 01 Žatec, Czech Republic
Sabina Trnková Hop Research Institute Co., Ltd., Saaz, Kadaňská 2525, 438 01 Žatec, Czech Republic

DOI:

https://doi.org/10.18832/kp2021.67.447

Keywords:

hop, Humulus lupulus L., essential oils, variability

Abstract

Czech hop varieties were evaluated as part of maintenance breeding. The evaluation was performed in a single location between 2011 and 2020. The average weight of hop essential oils (HEOs) is 0.43 to 2.28% w/w. The Saaz, Saaz Brilliant, Mimosa, Saaz Shine and Saaz Comfort hop varieties have a low amount of HEOs. Their maximum content of these compounds amounts to 1.1% w/w. The average proportion of myrcene is between 23.42 and 45.14% rel. Only the Agnus, Vital and Boomerang hop varieties have the maximum myrcene proportion above 50% rel. The average share of caryophyllene ranges between 6.19 and 13.15% rel. Saaz Late has a broad range of caryophyllene percentage – from 5.39% rel. to 15.53% rel. The average percenatge of farnesene is between 0.14 and 16.91% rel. Only the Saaz Comfort and Saaz Shine hop varieties have the maximum farnesene share above 20% rel. The average humulene content has a very broad range between 2.23 and 35.79% rel. The Vital, Mimosa, Gaia and Saaz Comfort hop varieties are in a group with a low humulene percentage, which is clearly different from other hop varieties. The average share of selinenes ranges broadly from 0.97 to 33.56% rel. Mimosa differs from the before mentioned varieties with its proportion of selinenes between 23.08 and 43.75% rel. The aim was to characterize and compare Czech hop varieties in terms of content and composition of HEOs.

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