Low-purine beer yeast and application thereof

The invention provides a method for breeding a low-purine beer yeast strain and belongs to the technical field of strain breeding, and the screened strain can be used for brewing high-quality low-purine beer. A normal-temperature and normal-pressure plasma mutagenesis instrument is used for carrying out mutagenesis treatment and TTC screening on a saccharomyces lagergensis strain, high performance liquid chromatography is combined for quantitative determination, and through mutagenesis and screening, a target strain C4 capable of effectively reducing the purine content of beer is bred on the premise that a saccharification process and a fermentation process are not changed; compared with the original strain fermentation liquor, the purine content is obviously reduced by about 17%. According to the method, the ARTP plasma mutagenesis instrument is combined with the perforated plate, so that screening of the low-purine beer yeast is realized, and the low-purine beer yeast strain is successfully bred. 本发明提供一种选育低