利用春江 0 3等 4个品种的转基因株及后代稳定系进行遗传研究表明 ,bar基因作为一个显性单位已整合在水稻核基因组中 ,转基因株稳定系 TR3、TR4、TR5、TR6对除草剂 Basta的抗性均受 1对显性基因控制 ,且 4个转基因株稳定系间 bar基因互不等位 ,不同位点的 bar基因之间存在基因互作 ,表现为基因重叠作用。Southern杂交分析结果表明 ,TR5、TR6的 bar基因整合位点互不相同 ,但可通过杂交育种重组到同一个水稻核基因组中。 Genetic studies using four varieties of transgenic lines such as Chunjiang 0 3 and the stable lines of progenies showed that the bar gene was integrated as a dominant unit in the nuclear genome of rice. Strain TR3, TR4, TR5 and TR6, Were controlled by one pair of dominant genes, and the bar genes of the stable strains of the four transgenic plants were not located in the same position. The bar genes of different loci interacted with each other, showing the gene duplication. Southern hybridization analysis showed that the bar gene integration sites of TR5 and TR6 are different from each other but can be recombined into the same rice nuclear genome by cross breeding.