Study on the Strains of Grifola frondosa (Fr)S. F. Gray

Seventeen strains of Grifola frondosa were collected from. China and foreign countries. Indoor and outdoor experiments showed that,GF17 belonged to middle temperatural type,its fruitbodies formed and developed at 17～26℃,the optimum temperature was 21～22℃;early maturity,white colour,the average fresh weight of single fruitbody was 143.5g,bearing rate reached 95% or more;GF5 was mid-low temperatural type,grew and developed at 16～20℃,optimum was 18℃,middle maturity,black colour,fresh single fruitbody weighted 116.5 g,bearing rate was more than 90%.GF11 and. GF6 were low temperatural type,grew at 14～19℃,the optimum was 16℃,late maturity,grey colour,average fruitbody weights were 151.5 and 119.5 respectively,bearing rate reached 85% or more.The analysis results showed that various. GF strains differ in their amino acid contents.The illumination intensity was an important factor for the colour-forming and quality of fruitbodies.