Yeast strain and application thereof

Abstract

The invention discloses a beer yeast strain and an application thereof in beer fermentation. The invention provides a saccharomyces cerevisiae Z5 with a preservation number of CGMCC No 3218. A breeding method of the yeast strain comprises the following steps: preparation of an original parent strain, activation in a test tube, ion implantation mutagenesis, laser mutagenesis, wort agar plate primary screening, fermentation bung secondary screening, passage stability test and pilot test. The yeast strain is an excellent beer yeast strain and has a potential of large-scale production of beer breweries.

Description

Technical field: [0001] The invention belongs to the field of yeast, and particularly relates to the selection and application of brewer's yeast strains. Background technique: [0002] Brewer's yeast is the lifeblood of beer, and its quality directly affects the quality of beer. Therefore, the separation and breeding of brewer's yeast is very important, but it is not easy to obtain excellent strains and use them for a long time. Although it is not a difficult task to construct a certain outstanding brewer's yeast strain by means of genetic engineering and other technical means, based on the consumer's safety considerations, and the complete deletion of a gene or the introduction of foreign genes may damage the yeast cells Therefore, no beer company in the beer industry at home and abroad has claimed that it uses transgenic yeast strains to produce beer, and traditional (classic) mutation breeding is still a big problem. The most important and effective technique for breedi...

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Deposit date July 30, 2009