Abstract: A yeast transformation vector containing a dominant auxotrophic gene, a yeast transformant containing the same and a method of preparation thereof. An adenine auxotrophic transformant able to grow in the presence of adenine can be obtained by inducing a dominant adenine auxotrophic (DAD) mnutation, isolating the dominant adenine auxotrophic gene DAD1, DNA sequencing the DAD1 gene to determine its mutation site, constructing pCABIOD101 vector containing the DAD1 gene (accession number: KCTC 1013BP), and transforming haploid laboratory yeast strains and diploid industrial yeast strains respectively with the pCABIOD101 vector. Therefore, the transformation vector system of the present invention can be used in improving existing industrial yeasts and various microorganisms.

Abstract: A method for producing mushroom mycelia and uses of the mushroom mycelia. Mushroom mycelia can be cultured at low cost in a broth made of the water from the washing of grains. Also, mushroom mycelia rich in trace minerals can be cultured in a broth supplemented with trace minerals. Feeding of feedstuffs mixed with the mushroom mycelia culture produces duck meats with excellent taste and quality and low cholesterol content.

Abstract: Disclosed is a method for producing mushroom mycelia and uses of the mushroom mycelia. Mushroom mycelia can be cultured at low cost in a broth made of the water from the washing of grains. Also, mushroom mycelia rich in trace minerals can be cultured in a broth supplemented with trace minerals. Feeding of feedstuffs mixed with the mushroom mycelia culture produces duck meats with excellent taste and quality and low cholesterol content.

Abstract: Disclosed are a method for culturing mushroom mycelia using grains, a culture product, and use of the culture product. Edible or medicinal mushroom mycelia are inoculated and cultured in solid media made of grains. Induction of the cultured mushroom mycelia to undergo autolysis produces autolysates rich in antitumorigenic and other medicinally useful materials. The squeezing of the autolysates produces a liquid filtrate, leaving a paste. The filtrate is concentrated for use in foods or medicines. The paste is processed into a nutrient-rich gruel or other foods.

Abstract: Disclosed are a method for culturing mushroom mycelia using grains, a culture product, and use of the culture product. Edible or medicinal mushroom mycelia are inoculated and cultured in solid media made of grains. Induction of the cultured mushroom mycelia to undergo autolysis produces autolysates rich in antitumorigenic and other medicinally useful materials. The squeezing of the autolysates produces a liquid filtrate, leaving a paste. The filtrate is concentrated for use in foods or medicines. The paste is processed into a nutrient-rich gruel or other foods.