The invention relates to the technical field of microbial
fermentation and feed production, in particular to a free
gossypol degrading bacterium YJQ-1 and application thereof.The free
gossypol degrading bacterium YJQ-1 is
Wickerhamomyces anomalus, is preserved in the China Center for Type Culture Collection on March 4, 2026, has the preservation number of CCTCC M 2026367 and is separated from Sichuan Dazhou sweet distiller's
yeast. The strain can tolerate 2.0 g / L of
gossypol acetate, and the degradation rate of 1.0 g / L of
gossypol acetate within 72 h reaches 83.75%. The microbial inoculum prepared from the strain is inoculated to
cottonseed meal sieved by a 40-mesh
sieve according to the inoculum size of 5%, the
moisture content is adjusted to 40%,
solid state
fermentation is performed at 30 DEG C for 7 days, the gossypol degradation rate is 86.52%, the free gossypol is only 144 mg / Kg, and nutritional indexes such as
cottonseed meal crude
protein and
protein digestibility are remarkably improved. The technology is low-carbon and environment-friendly, the application range of the
cottonseed meal is widened, and a foundation is laid for biological manufacturing of
oil processing byproduct
protein resources.