Draft Genome Sequences of Two Natural Isolates of the Yeast Barnettozyma californica from Ireland, UCD09 and UCD89

Mullen, Alisha A.; Lynch, Ciara; Hill, Shannon M.; Holohan, Cian; Cróinı́n, Tadhg Ó; Wolfe, Kenneth H.; O’Brien, Caoimhe E.; Butler, Geraldine

doi:10.1128/genomea.00548-18

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“…Two S. eubayanus strains (UCD646 and UCD650) were isolated from soil samples from the Belfield campus of University College Dublin, as part of undergraduate research modules that identify and sequence the genomes of yeast species (Mullen et al 2018 , O'Boyle et al 2018 , Venkatesh et al 2018 , Almasoud et al 2019 , Faherty et al 2019 , Heneghan et al 2019 , O Cinneide et al 2021 , Ryan et al 2021 ). A detailed description of the isolation method is provided in Text S1 ( Supporting Information ).…”

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confidence: 99%

Identification of European isolates of the lager yeast parent Saccharomyces eubayanus

Bergin

Allen

Hession

et al. 2022

FEMS Yeast Research

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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.

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