Variability in the contents of important compounds for pharmaceutical and brewing industries within hop gene pool | Variabilita obsahu farmaceuticky a pivovarsky významných látek u genofondu chmele (Humulus lupulus L.)
2009
Nesvadba, V., Hop Research Institute Co., Ltd., Žatec (Slovak Republic) | Krofta, K., Hop Research Institute Co., Ltd., Žatec (Slovak Republic)
Totally 1546 hop samples have been determined for statistical assessment of hop database in 2006-2007. The average content of alpha acids is 6.07% with the variability of 64.6%. The range is from 0.37 to 17.82% w/w. The average content of beta acids is 4.5% w/w with the variability of 33.4%. The range is from 0.54 to 10.89% w/w. The average content of cohumulone is 27.3% relative (rel.) and 48.1% rel. in the case of colupulone. This compound shows lower variability (CV = 27%, resp. 18%). Important ingredients for pharmacy are xanthohumol and desmethylxanthohumol (DMX). The average content of xanthohumol amounts to 0.36% w/w under variability CV = 48%. Minimal content is 0.02% and maximal content is 0.94%. The average content of DMX amounts to 0.09% under variability CV = 56%. Minimal content of DMX is 0.01% and maximal one is 0.2%. Positive correlations of alpha acid content (r = 0.78) as well as beta acid content (r = 0.52) with the contents of xanthohumol have been determined as well. Nearly the same positive correlation has been determined for the influence of alpha and beta acids on the content of DMX (r = 0.61, resp. 0.60). Although positive correlations have been determined for xanthohumol and DMX (r = 0.58), we can conclude that it is impossible to combine breeding for high contents of these both compounds together.
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