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Novel brewing yeast hybrids: creation and application.

Kristoffer Krogerus^1,2, Frederico Magalhães^3,4, Virve Vidgren³

¹VTT Technical Research Centre of Finland, Tietotie 2, P.O. Box 1000, 02044, Espoo, Finland. kristoffer.krogerus@aalto.fi.

Applied Microbiology and Biotechnology

|November 26, 2016

Summary

Artificially created Saccharomyces cerevisiae × Saccharomyces eubayanus hybrids offer superior brewing properties, including enhanced fermentation and stress tolerance. These novel yeast strains hold significant potential for the future of lager beer production and understanding yeast evolution.

Keywords:

Aroma Brewing Heterosis Lager Mating S. eubayanus Stability Stress tolerance

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Area of Science:

Microbiology and Fermentation Science
Yeast Genetics and Hybridization

Background:

The Saccharomyces cerevisiae × Saccharomyces eubayanus hybrid is crucial for lager beer production, possessing unique traits like low-temperature tolerance and maltotriose utilization.
Recent discovery of the parental strain S. eubayanus and the industrial application of newly created lager yeast strains are still emerging.

Purpose of the Study:

To explore the potential of de novo created Saccharomyces cerevisiae × Saccharomyces eubayanus hybrids for lager brewing.
To discuss the advantages of these artificial hybrids over their parent strains and their impact on brewing innovation.

Main Methods:

Review and discussion of hybridization techniques for generating yeast hybrids.
Analysis of hybrid genome function, stability, and comparative performance against parental strains.

Main Results:

Artificially created hybrids demonstrate superior performance in fermentation rate, sugar utilization, stress tolerance, and aroma formation compared to parent strains.
Hybridization provides a viable method for generating novel brewing yeast strains with desirable, non-genetically modified (non-GM) properties.

Conclusions:

De novo yeast hybridization offers a promising avenue for developing advanced lager brewing yeast with unique characteristics.
This approach is expected to significantly impact the future of lager brewing and contribute to understanding the evolutionary history of industrial lager yeast.