Saccharomyces cerevisiae strain with high yield of ethyl butyrate and construction method and application of Saccharomyces cerevisiae strain

A genetically engineered Saccharomyces cerevisiae strain for producing ethyl butyrate, wherein the genetically engineered Saccharomyces cerevisiae strain is obtained by using Saccharomyces cerevisiae as an original strain and over-expressing acetyl-CoA C-acetyltransferase gene Erg10, 3-hydroxybutyryl-CoA dehydrogenase gene Hbd, 3-hydroxybutyryl-CoA dehydratase gene Crt, trans-2-enoyl-CoA reductase gene Ter and alcohol acyltransferase gene AAT;

• wherein the acetyl-CoA C-acetyltransferase gene Erg10 is overexpressed by a first strong promoter;
• wherein the 3-hydroxybutyryl-CoA dehydrogenase gene Hbd and the 3-hydroxybutyryl-CoA dehydratase gene Crt are arranged in tandem together to replace gene GAL80 and the 3-hydroxybutyryl-CoA dehydrogenase gene Hbd and the 3-hydroxybutyryl-CoA dehydratase gene Crt are both overexpressed by a second strong promoter;
• wherein the trans-2-enoyl-CoA reductase gene Ter and the alcohol acyltransferase gene AAT are arranged in tandem together to replace gene HXT16 and the trans-2-enoyl-CoA reductase gene Ter and the alcohol acyltransferase gene AAT are both overexpressed by a third strong promoter;
• and
• wherein ethyl butyrate production of the genetically engineered Saccharomyces cerevisiae strain is improved relative to the original strain.