Hybrid Selection of Saccharomyces cerevisiae Yeasts for Thermotolerance and Fermentation Activity


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Molecular genetic screening of Saccharomyces yeasts, isolated from natural sources in the regions of the world with a hot climate (Africa, South America, Southeast and Central Asia) was used for the search of thermotolerant S. cerevisiae strains. Based on physiological tests, four strains were selected that could grow at high temperatures (42 and 43°C) and had good fermentation activity: 7962-4B, 3529-7B, 52922-4-1-1A- 1C, and 87-2421.1-2A. Hybrids of monosporic culture of distiller’s race XII (XII7-2) with the thermotolerant strains were obtained. Unlike the strain XII7-2, which is unable to grow at above 39°C, all hybrids showed good growth at 42°C. Two of the six hybrids analyzed, H2-1 (87-2421.1-2A × XII7-2) and H3-2 (7962-4B × XII7-2), showed higher fermentation activity than the parental strains. According to the results obtained, inter-strain hybridization is an efficient method of obtaining S. cerevisiae strains, which combine thermotolerance with high efficiency of alcoholic fermentation.

作者简介

E. Naumova

State Research Institute of Genetics and Selection of Industrial Microorganisms

Email: gnaumov@yahoo.com
俄罗斯联邦, Moscow

A. Sadykova

State Research Institute of Genetics and Selection of Industrial Microorganisms

Email: gnaumov@yahoo.com
俄罗斯联邦, Moscow

N. Martynenko

Moscow State University of Food Production

Email: gnaumov@yahoo.com
俄罗斯联邦, Moscow

G. Naumov

State Research Institute of Genetics and Selection of Industrial Microorganisms

编辑信件的主要联系方式.
Email: gnaumov@yahoo.com
俄罗斯联邦, Moscow

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