In this study,the effiency of sperm-mediated gene transfer was analyzed for foreign gene introduced into and intergrated in the silkworm′s genome and inherited by the offspring.Different concentration or conformation vector DNA including gfp or egfp report gene were used in the gene transfer experiment on silkworm.The results showed that 5 DNA samples extracted from 14 G_(0)generation spawns were positive by PCR(positive proportion 35.7%) after introduction linearized pG350 with the concentration 2.0 mg/mL ...