转基因农作物具有多种全新优良品质, 其特征是采用生物工程技术将一个物种基因嵌入另一个物种中。现行的基因工程方法主要有以下几种: 1、首先选择所需特性的DNA片断,以便将它导入农作物中。然后将称为细胞质遗传体的螺旋形DNA链从土壤细菌中抽取出来,再把细胞质遗传体环剪开,以便将所需特性DNA片断嵌入环中,并把再造胞质遗传体环移回土壤细菌中。2、例如改造西红柿,就将一片西红柿叶浸入这种土壤细菌溶液中以利土壤细菌与西红柿细胞亲合。这样就将改变的细胞质遗传体转移到植物细胞DNA链中。3、一旦外源DNA被移植到农作物细胞核中,它便成为该植物染色体成分。4、研究人员继而培植该植物细胞,直至它分裂并生成新型植物。与此同时,新生植物就带有为其基因编码的外源DNA。5、含有全新特性的植物就可以入土栽 Genetically modified crops have many new and excellent qualities that feature the use of bioengineered technology to embed one species of gene into another. The current genetic engineering methods are the following: 1, first select the desired characteristics of the DNA fragment in order to import it into crops. The helical DNA strand, called the cytoplasmic body, is then extracted from the soil bacteria and the ring of cytoplasmic genetic material is then primed to embed the desired characteristic DNA fragment into the loop and the loop of re-engineered cytoplasmic genetic material back to the soil Bacteria. 2, such as the transformation of tomatoes, will be a piece of tomato leaves immersed in this soil bacteria solution to facilitate soil bacteria and tomato cells affinity. This will change the cytoplasmic genetic transfer to the plant cell DNA chain. Once exogenous DNA has been transplanted into the crop nucleus, it becomes the plant’s chromosomal component. 4. The researcher then breeds the plant cell until it divides and produces a new type of plant. In the meantime, newborn plants carry foreign DNA that is encoded for their genes. 5, with new features of plants can be planted into the soil