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育种家将某种Bt细菌中的一种可以引导生产生杀虫蛋白质的遗传物转到了棉花中,这种杀虫蛋白质可以使棉铃虫消化道产生穿孔,最终导致其死亡。而且这种蛋白质对包括人体在内的高等动物无任何副作用,因为它们在胃中即被分解。早在抗虫棉研制的初期,育种学家们就通过这样的实验证实了Bt抗虫基因的抗虫能力,分别取转基因抗虫棉和普通棉的叶片置于两玻璃瓶器皿,分别接入8条棉铃虫初孵幼虫,7d后即可发现转基因抗虫棉有数个针眼大小的孔,只有对光才可见,棉铃虫且全部死亡。同时另一个平面器皿普通叶片被蚕食严重,棉铃虫膘肥体壮。又据大田调查结果,以GK-12为代表的中国抗虫棉抗虫能力强,即使不用农药防治棉铃虫,其产量也高于人工防治的普通棉。
Breeders transfer one of the Bt bacteria that can direct the genetic material that produces the insecticidal protein to the cotton, which can cause perforation in the digestive tract of the cotton bollworm and ultimately its death. And this protein does not have any side effects on higher animals, including the human body, because they are broken down in the stomach. As early as the early development of insect-resistant cotton, breeders confirmed through experiments that Bt insect resistance genes, respectively, take transgenic insect-resistant cotton and ordinary cotton leaves placed in two glass containers, access The first eight hatched larvae of cotton bollworm, seven days after the transgene can be found in insect-resistant cotton needle hole size holes, only visible to light, bollworm and all died. At the same time another plane utensils ordinary leaves are serious erosion, bollworm 膘 fat body strong. According to Daejeon’s findings, the resistance of Chinese insect-resistant cotton, represented by GK-12, to insect-resistant cotton is strong. Even without the use of pesticides to control cotton bollworm, its yield is also higher than that of artificial cotton.