Gene for controlling Sclerotinia sclerotiorum (Lib.) de Bary of Brassica napus L. and use thereof

The invention discloses a gene for controlling Sclerotinia sclerotiorum (Lib.) de Bary of Brassica napus L. and a use thereof and especially relates to isolation and cloning, functional verification and application of a gene BnWRKY33 for controlling Sclerotinia sclerotiorum (Lib.) de Bary of Brassica napus L. The gene BnWRKY33 has the function of controlling Sclerotinia sclerotiorum (Lib.) de Bary of crops. In Sclerotinia sclerotiorum (Lib.) de Bary treatment on Brassica napus L., a BnWRKY33 expression level is substantially improved. Through the gene engineering technology, a BnWRKY33 expression level is improved and Sclerotinia sclerotiorum (Lib.) de Bary of Brassica napus L. can be controlled and thus the gene provides an important application prospect for improving Sclerotinia sclerotiorum (Lib.) de Bary resistance and yields of Brassica napus L. and other crops.