Transgenic Ramie with Bt Gene  Mediated by Agrobacterium tumefacien and Evaluation of Its Pest-Resistance Studies on Transfer of Bt Gene into Glycine max The influence of wind direction on pollen-mediated gene flow in transgenic insect-resistant cotton Analysis on Insecticidal Activity of Bt Transgenic Populus deltoides × P. euramericana cv‘Nanlin895’and Its Effects on Soil Microorganism Interaction between exogenous Bt gene and secondary metabolites of crop Genetic Mapping of the Fruit Bitterness Gene(Bt)in Cucumber(Cucumis sativus L.) Genetic Mapping of the Fruit Bitterness Gene(Bt)in Cucumber(Cucumis sativus L.) Studies on Transformation of Bt Gene into Rice Mediated by Agrobacterium (Oryza sativa) Stability of Insect??resistance of Bt Transformed Populus n igraPlantation and Its Effects on the Natural Enem ies of Insects Breeding of Rice Transgenic Sterile Lines with Bore Resistance by Small Population Backcrosses Combined to GUS Marker-assisted Selection Transformation of Cry5Aa BT in Cotton and Identification of its Insect-resistant STUDY ON INSECT-RESISTANT TRANSGENIC POPLAR PLANTS CONTAINING BOTH BT AND PI GENE