National Research Council of Italy

Institute of Biosciences and BioResources

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IBBR publication #1946

Identification and characterization of wild hop germplasm in Umbria region

Riccioni C, Belfiori B, Perretti G, Rubini A, Bellucci M

In: “JOINT CONGRESS SIBV-SIGA "SUSTAINABILITY OF AGRICULTURAL ENVIRONMENT: CONTRIBUTIONS OF PLANT GENETICS AND PHYSIOLOGY"”. Pisa, 19/09/2017, 22/09/2017. [ISBN: 978-88-904570-7-4] (2017)

Hop (Humulus lupulus L.) is a worldwide distributed crop, a perennial, dioecious and climbing species classified in the family Cannabaceae. The female hop flower (hop cone) is used in brewing to impart flavors (bitterness and aroma) and to preserve beer durability. Hop has also long been used in traditional medicine, especially as a sedative and antimicrobial agent. Traditionally, a few commercial varieties are used for brewing. Wild hops are distributed throughout the Northern Hemisphere and molecular phylogeny has shown that European, Asian and North American hops are clearly distinct. Modern hop varieties are characterized by limited genetic variation and wild germplasm is needed to provide new genetic resources for breeding. In addition, the characterization of wild Italian hops may also allow the production of beers based on local ingredients. To evaluate the intraspecific diversity of wild hop in Umbria region, several plants have been collected from 20 different locations. The DNA extracted from these plants has been genotyped with microsatellite markers. Wild accessions will also be evaluated for their aromatic profile and bitter acids composition. Some selected plants will be used for surveying microbreweries to evaluate which hop accessions are the most interesting for beer production. Moreover, a characterization of the hop endophytic fungi is in progress to identify fungal species producing bioactive compounds.

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