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A lot can happen after a few drinks: Saccharomyces hybridization

ResearchBlogging.org

We may have to reevaluate whether Saccharomyces cerevisiae alone is the species used to brew beer.  A paper from Gonzalez et al describes results from PCR-RFLP comparison of 24 brewing strains identifies evidence for S. cerevisiae x S. kudriavzevii hybrids.  Although this hybridization is not unprecedented, most seem to be related to cultivated brewing or [...]

Saccharomyces strain sequencing

While many strains of S. cerevisiae are being sequenced, a single strain, YJM789, isolated from the lung of an AIDS patient was sequenced a few years ago at Stanford and published this summer. The genome was described in a paper entitled “Genome sequencing and comparative analysis of Saccharomyces cerevisiae strain YJM789″.