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Abstract

This study investigated the volatile phytochemical diversity of 30 samples obtained from experimental hybrid and commercial H. lupulus L. plants. Essential oils distilled from these samples were analysed by high resolution gas chromatography coupled with accurate mass time-of-flight mass spectrometry (GC–accTOFMS). A total of 58 secondary metabolites, mainly comprising 18 esters, 6 monoterpene hydrocarbons, 2 oxygenated monoterpenes, 20 sesquiterpene hydrocarbons, 7 oxygenated sesquiterpenes, and 4 ketones, were positively or tentatively identified. A total of 24 metabolites were detected in all samples, but commercial cultivars (selected for brewing performance) had fewer compounds identified compared to experimental genotypes. Chemometrics analyses enabled distinct differentiation of experimental hybrids from commercial cultivars, discussed in terms of the different classes of compounds present in different genotypes. Differences among the mono- and sesquiterpenoids, appear to be related to either: i) the genetic origin of the plants; or ii) the processes of bioaccumulation of the identified secondary metabolites.

Item Type:	Article
Authors/Creators:	Yan, D and Wong, YF and Shellie, RA and Marriott, PJ and Whittock, SP and Koutoulis, A
Keywords:	Humulus lupulus L., volatile phytochemical profile, hop genotypes, beer, GC–accTOFMS
Journal or Publication Title:	Food Chemistry
Publisher:	Elsevier Sci Ltd
ISSN:	0308-8146
DOI / ID Number:	10.1016/j.foodchem.2018.09.082
Copyright Information:	© 2018 Elsevier Ltd. All rights reserved.
Related URLs:	UTAS Profile: Shellie, RA UTAS Profile: Whittock, SP UTAS Profile: Koutoulis, A
Item Statistics:	View statistics for this item

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