根癌农杆菌介导β—1，4—半乳糖苷转移酶基因转化大豆及其转基因植株再生

以大豆下胚轴为外植体，通过根癌农杆菌介导转化法，建立起良好的转化系统，将人的β-1，4－半乳糖苷转移酶基因（hGT)导入大豆。经转化的外植体在添加100mg/L氨苄青霉素和50mg/L卡那霉素的选择培养基中可诱导出愈伤组织和芽再生，在1／2MS培养基上诱导生根，并培养成再生苗，获得了完整的抗性再生植株。进行Southern blot分子杂交鉴定，证实了外源基因hGT已稳定地整合到植物基因组中。

Agrobacterium-MediatedTransformation of Glycine Max and Regene rati on of Transgenic Plants

A reproducible transformation system was developed for soybean (Glycin e max) using as explants sections from the excised hypocotyls of seeds. A constr uct containing cauliflower mosaic virus 35S-neomycin phosphotransferase (nptII) and human β-1,4-galactosyltransferase (hGT) was introduced into soybean culti var using Agrobacterium tumefaciens- mediated transfermation procedures. Regenerat i on was via organogenesis and transformed plants were selected on medium containi ng 50 mg/L kanamycin and 100 mg/L of aminopenicillanic acia. Transgenic soybeans were raised in the glasshouse. The hGT genes was integrated into the chomosomal genome of primary transgenic soybean plants, The transformation of regenerated plants was confirmed by assays for neomycin phosphotransferase activity and Sout hern blotting analyses.