1. Slovenian Institute of Hop Research and Brewing; Cesta Žalskega tabora 2 3310 Žalec Slovenia
2. Department of Agronomy; Biotechnical Faculty; University of Ljubljana; Jamnikarjeva 101 1000 Ljubljana Slovenia
3. Institute of Plant Molecular Biology; Biology Centre ASCR v.v.i; Branišovská 31 České Budějovice 370 05 Czech Republic