Saccharomyces bayanus is a yeast of the genus Saccharomyces, and is used in winemaking and cider fermentation, and to make distilled beverages.

[1][2] Notably, most commercial yeast cultures sold as pure S. bayanus for wine making, e.g. Lalvin EC-1118 strain, have been found to contain S. cerevisiae cultures instead.

[3] S. bayanus is used intensively in comparative genomics studies.

[4][5][6][7][8] Based on a computation-based experimental design system,[8] Caudy et al.[5] generated a rich resource for expression profiles for S. bayanus, which has been used in several comparative studies in yeast systems, including expression patterns [6] and nucleosome profiles.

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