microorganisms Article Hybridization of Saccharomyces cerevisiae Sourdough Strains with Cryotolerant Saccharomyces bayanus NBRC1948 as a Strategy to Increase Diversity of Strains Available for Lager Beer Fermentation Martina Catallo 1,† , Fabrizio Iattici 1,†, Cinzia L. Randazzo 2, Cinzia Caggia 2, Kristoffer Krogerus 3 , Frederico Magalhães 3, Brian Gibson 4 and Lisa Solieri 1,* 1 Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy;
[email protected] (M.C.);
[email protected] (F.I.) 2 Department of Agricultural, Food and Environment, University of Catania, via Santa Sofia, 95123 Catania, Italy;
[email protected] (C.L.R.);
[email protected] (C.C.) 3 VTT Technical Research Centre of Finland Ltd., Tietotie 2, P.O. Box 1000, FI-02044 VTT Espoo, Finland; Kristoffer.Krogerus@vtt.fi (K.K.); Frederico.Magalhaes@vtt.fi (F.M.) 4 Chair of Brewing and Beverage Technology, Technical University of Berlin, Seestraße 13, 13353 Berlin, Germany;
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[email protected]; Tel.: +39-0522-522026 † These authors contribute equally to this work. Citation: Catallo, M.; Iattici, F.; Abstract: The search for novel brewing strains from non-brewing environments represents an Randazzo, C.L.; Caggia, C.; Krogerus, emerging trend to increase genetic and phenotypic diversities in brewing yeast culture collections. K.; Magalhães, F.; Gibson, B.; Solieri, Another valuable tool is hybridization, where beneficial traits of individual strains are combined in a L. Hybridization of Saccharomyces cerevisiae Sourdough Strains with single organism. This has been used successfully to create de novo hybrids from parental brewing Cryotolerant Saccharomyces bayanus strains by mimicking natural Saccharomyces cerevisiae ale × Saccharomyces eubayanus lager yeast NBRC1948 as a Strategy to Increase hybrids.