Yeast strain of beer and application thereof

Abstract

The invention discloses a yeast strain of beer and the application thereof in the aspect of beer fermentation. The strain of the beer-brewing yeast (saccharomyces cerevisiae) provided by the invention is preserved in the China General Microbiological Culture Collection Center, and the preservation number is CGMCC No.3217. The selecting and breeding method of the strain comprises the following steps: activating the original starting strain, injecting ions for mutation, mutating by laser, primarily sieving by using wort and agar flat plate culturing medium, sieving again by using a fermentationbung, testing genetic stability, and performing a pilot-scale test. The yeast strain of beer is an excellent yeast strain of beer and has a potential suitable for large production of beer breweries.

Description

Technical field: [0001] The invention belongs to the field of microbes, in particular to beer yeast strains and applications thereof. Background technique: [0002] Brewer's yeast is the soul of beer fermentation, and the work of breeding excellent strains is a process with a heavy workload and slow results. Although molecular biology technology is very developed today, it is not difficult to construct a beer yeast strain with a certain indicator by means of genetic engineering and other technical means, but based on consumers' safety considerations, and the complete deletion of a certain Genes or the introduction of foreign genes may destroy the metabolic balance in the yeast cells and affect the requirements of the index balance characteristics of the beer fermentation process. Therefore, so far, no beer company in the beer industry at home and abroad has declared that it uses genetically modified yeast strains to produce beer , the traditional (classical) mutation breedi...

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Deposit date July 30, 2009.

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