Saccharomyces eubayanus—a tale of endless mysteries.

This confusion prevailed in the literature until recently and resulted in the inaccurate use of the name I S. bayanus i or I S. bayanus i variety I uvarum i to refer to I S. uvarum i (e.g. Caudy et al. [8], Cliften et al. [9], Kellis et al. [16]). That study also showed that I S. uvarum i was the sister taxon of I S. eubayanus i and, importantly, was not a synonym of I S. bayanus i , thus confirming earlier reports (e.g. Nguyen and Gaillardin [25]). Therefore, the finding of I S. eubayanus i in South America solved one mystery but created another - the Atlantic Ocean and 12 000 km separated the region where I S. eubayanus i was found from the region where, plausibly, the formation of the hybrid I S. pastorianus i took place. The genomes of I S. eubayanus i and the non-cerevisiae subgenome of I S. pastorianus i had 99.56% identity, which demonstrated that I S. eubayanus i was the elusive non-cerevisiae progenitor of lager yeasts. [Extracted from the article]