VITAL - The Czech hop hybrid variety - Part I
2013
Krofta, K., Chmelarsky Inst., Zatec (Czech Republic) | Patzak, J., Chmelarsky Inst., Zatec (Czech Republic) | Nesvadba, V., Chmelarsky Inst., Zatec (Czech Republic) | Mikyska, A., Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic) | Slaby, M., Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic) | Cejka, P., Vyzkumny Ustav Pivovarsky a Sladarsky, Prague (Czech Republic)
The Vital hop variety was first registered in 2008. Vital is genetically most related to Agnus, another Czech variety. The yield potential is 2.0 to 2.5 t/ha. With respect to its content of alpha-bitter acids of 10 to 15% it belongs to the bitter cultivars. Both the concentrations of beta-bitter acids (6-10%) and total hop oils (1.5-2.5%) are high. The levels of farnesene and humulene of up to 5% rel. are characteristic for the hop oils compositions. The concentration of selinene was 7-15% rel. The most significant characteristic of the variety is the high content of desmethylxanthohumol (DMX). DMX levels in fresh green cones were 0.50-0.70%. In the course of drying significant losses of DMX occur due to its chemical instability. Under the most common drying temperatures of 55-60 deg C the loss of DMX is more than 30% rel.
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