The genome DNA of tobacco was extracted from the transgenic tobacco. The PCR, PCR-Southern and Southern results confirmed that the tha gene was integrated into the tobacco genome.

• 提取转基因烟草基因组总DNA，分别用PCR、PCR-Southern和Southern杂交检测转基因植株，结果显示thaumatin cDNA基因已整合到转基因烟草中。