Transgenic breeding is an extension and breakthrough of traditional crossbreeding techniques. Both use modern molecular biology technology to transfer and change the species genes. The difference is that traditional crossbreeding technology is only carried out in the same species, and transgenes cross this limitation. It breaks the boundaries between species and easily achieves more precise and controllable gene recombination and transfer among different species. . Foods that use these types of genetically modified organisms as direct foods or raw materials for processed foods are "genetically modified foods."
Genetically modified foods can greatly increase the yield per unit area of ​​crops, enhance the ability of crops to resist pests and viruses, increase the storage of agricultural products, and at the same time enable agricultural products to shake off the seasonal restrictions and achieve low-cost supply for four seasons.
Despite this, the potentially unproven nature of genetically modified foods has continued to be questioned since birth, and continues to be affirmed by scientific advances. The debate over the "angels" and "devils" of genetically modified foods, Never stopped.
The debate on the safety of genetically modified foods in the world has a long history. Greenpeace has data showing that studies in the United Kingdom have shown that genetically modified foods may cause damage to the liver of people with a single dietary structure and weak immunity, although it has not yet occurred. Examples of death from eating genetically modified foods.
In China, genetically modified foods that are eaten directly like rice are not fully validated and are not allowed to appear in the market. However, the public remains suspicious of genetically modified foods. This is mainly because the audience is in a passive position in the cognition of related genetically modified foods. It is expressly stipulated in the "Sanitary Measures for the Administration of Genetically Modified Foods" that agricultural genetically modified organisms listed in the list of agricultural genetically modified organisms should be responsible for the production and distribution of units and individuals. Logos, unlabeled, may not be sold.
As a matter of fact, the reporters visited major supermarkets, and the products processed from common genetically modified raw materials such as soy flour and salad oil were scarcely marked with the words “genetically modified products†or “genetically modified raw materials†on the external packaging. Yes, a certain brand of soy sauce made from soybeans is marked "not genetically modified" in a prominent place. It can be seen here that the public lacks effective knowledge of genetically modified foods and at the same time, it has caused very low acceptance of transgenes.
From a professional perspective, various experts have very different expectations for the prospects of genetic transformation, which can be roughly divided into two groups, optimist and cautious. At the two conferences this year, experts from the Central China Laboratory devoted to the study of genetically modified rice were fully confident in the ambitious plan of "Generating Rice with Genetically Modified Rice in 5 Years". There are also academicians of the Chinese Academy of Sciences who believe that "GM rice is no more harmful to the human body than water." Of course, there are quite a few professionals who are cautious about genetically modified foods. In June this year, the international market survey report released by Greenpeace in Beijing, “The gloomy prospects of the GM rice market†seems to be another evidence that GM foods cannot be swept away. Also in June this year, Yuan Longping, the father of hybrid rice, also stated at the theme forum of the Shanghai World Expo that it is necessary to properly develop genetically modified foods, but it is also necessary to be cautious in the promotion of large areas. After all, it is the mice that are tested and the ones that actually eat are people. !
It is precisely in these industries that there are still no unified opinions, and the source channels of the audience are not unobstructed, resulting in the status quo of the appearance of genetically modified foods is always hidden, and it is not possible to change this situation overnight. Completed, first, the hazard assessment criteria for genetically modified foods have not yet been unified, and the second is that the trials involving human life safety are still in the stage of animal testing. If we can overcome these two barriers, I believe not only genetically modified foods can find themselves more. Clear positioning will also be a big step for GM science.
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