Genetic engineering strain for producing (R, R)-2, 3-butanediol, acetoin and tetramethylpyrazine and application

The invention relates to a genetic engineering strain for producing (R, R)-2, 3-butanediol, acetoin and tetramethylpyrazine and application of the genetic engineering strain, and belongs to the technical field of genetic engineering. The preservation number of the genetic recombination engineering strain MW-BS1 is CCTCC No: 2022436, the preservation date is April 20, 2022, the preservation unit is China Center for Type Culture Collection, the preservation address is Wuhan University, Wuhan, China, and the preservation number is CGMCC No: 2022436, the preservation unit is China Center for Type Culture Collection, the preservation address is Wuhan University, Wuhan, China, and the strain is named as Bacillus subtilis MW-BS1. Different target products (R, R)-2, 3-butanediol, acetoin or tetramethylpyrazine are obtained by controlling the metabolic flow direction in the fermentation process, compared with an engineering strain of a single product, one strain is used for achieving production of multiple products, t