Abstract
Saccharomyces pastorianus FBY0095 was mutated and variants were selected for efficient very high gravity brewing using 15% (w/v) maltose and 15% (w/v) ethanol. Two useful variants were obtained of which one (L6) had growth, wort consumption and ethanol production rates of 0.036, 1.13 and 0.49 g l−1 h−1, respectively. The corresponding results for the wild type were 0.028, 0.98 and 0.4 g l−1 h−1, respectively. The vitality of the variant (expressed as acidification power) was 2.5 while that of the wild type was 2.3. There was also an obvious improvement on flavor of resulting beer when using L6 and the other variant.
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Acknowledgments
The authors gratefully acknowledge the National Natural Science Foundation of China (No. 31000810) and the Key Technology R&D Program of Guangdong Province (Nos. 2009A010700004, 2010A010500002 and 2011A020102001) for their financial supports.
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Yu, Z., Zhao, H., Li, H. et al. Selection of Saccharomyces pastorianus variants with improved fermentation performance under very high gravity wort conditions. Biotechnol Lett 34, 365–370 (2012). https://doi.org/10.1007/s10529-011-0780-8
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DOI: https://doi.org/10.1007/s10529-011-0780-8