Identification of European isolates of the lager yeast parent Saccharomyces eubayanus

Lager brewing first occurred in Bavaria in the 15th century, associated with restrictions of brewing to colder months. The lager yeast, Saccharomyces pastorianus, is cold tolerant. It is a hybrid between Saccharomyces cerevisiae and Saccharomyces eubayanus, and has been found only in industrial sett...

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Bibliographic Details
Published in:FEMS yeast research 2022-12, Vol.22 (1)
Main Authors: Bergin, Sean A, Allen, Stephen, Hession, Conor, Ó Cinnéide, Eoin, Ryan, Adam, Byrne, Kevin P, Ó Cróinín, Tadhg, Wolfe, Kenneth H, Butler, Geraldine
Format: Article
Language:English
Subjects:
China
Humans
New Zealand
North America
Saccharomyces - classification
Saccharomyces - isolation & purification
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Summary:Lager brewing first occurred in Bavaria in the 15th century, associated with restrictions of brewing to colder months. The lager yeast, Saccharomyces pastorianus, is cold tolerant. It is a hybrid between Saccharomyces cerevisiae and Saccharomyces eubayanus, and has been found only in industrial settings. Natural isolates of S. eubayanus were first discovered in Patagonia 11 years ago. They have since been isolated from China, Tibet, New Zealand, and North America, but not from Europe. Here, we describe the first European strains UCD646 and UCD650, isolated from a wooded area on a university campus in Dublin, Ireland. We generated complete chromosome level assemblies of both genomes using long- and short-read sequencing. The UCD isolates belong to the Holarctic clade. Genome analysis shows that isolates similar to the Irish strains contributed to the S. eubayanus component of S. pastorianus, but isolates from Tibet made a larger contribution.
ISSN:1567-1364
1567-1356
1567-1364
DOI:10.1093/femsyr/foac053