Microblogs and forums are spreading the saying: "quick frozen sweet corn kernels are real genetically modified food! In the United States, this kind of corn can only be used to feed animals, not people! " Is it true or out of thin air? Rumors end in wise men, and rumors end in science. To identify the truth, we should understand the source of quick-frozen sweet corn from the perspective of science.

1. End of time dimension: it is produced by natural evolution and has been planted for a long time.

How did you get such "different" sweet corn? Unlike what many people take for granted, sweet corn is not a new crop recently.

According to research, sweet corn with sugar endosperm existed in central and South America in the pre Colombian period. The native sweet corn of South America belongs to chullpi comprehensive species. Chullpi is "sweet corn" in Quechua. Grobman et al. Classified chullpi as an ancient derivative of Peruvian origin. You know, there was no such thing as transgenic at that time.

Today's sweet corn varieties are not completely the same as before, but they are also not the product of transgenic, but a new sweet corn variety cultivated by traditional breeding technology - breeding inbred lines and combining hybrids on the basis of naturally mutated sweet corn varieties.

2. End of technical dimension: without the application of foreign genes, it is not genetically modified food.

The definition of transgenic plant is to artificially transform the foreign target gene by means of genetic engineering and transfer it into the recipient plant to express and produce the target character controlled by foreign gene. For example: insect resistant transgenic maize, Bacillus thuringiensis gene (BT for short). Glyphosase resistant genes were isolated from herbicide resistant transgenic maize and Agrobacterium tumefaciens variant CP4. The key words of transgene definition are foreign gene and transgene.

Fresh corn is a novel corn harvested at milk ripening stage for vegetables or fruits. Fresh corn, whether ordinary sweet corn, super sweet corn or waxy corn, is not a special kind of corn cultivated by transgenic means with foreign genes. Instead, it uses maize's own mutant genes, mainly endosperm mutant genes, also known as embryonic mastoid variants (the relative content of water-soluble polysaccharides in sweet maize endosperm is very high, which gives it a sweeter taste than ordinary maize). Therefore, fresh corn is not a genetically modified product.

According to the grain color, fresh corn is divided into two colors, red, purple, flower color and white. Carotenoids and anthocyanins are two substances that affect maize grain pigment. Carotenoids mainly exist in the endosperm and seed coat of corn grains, β- Carotene, lutein. Anthocyanins mainly accumulate in aleurone layer and are antioxidants. In other words, the color of fresh corn is not related to GM.

3. End of policy dimension: strict seed approval system to ensure the safety of seed sources.

At present, China implements the experimental approval system of corn varieties. That is, before a species is planted and sold on a large scale in consumption, it must be subject to multi-point experiments organized by the national or provincial agricultural authorities for 2 to 3 years. Only after reaching the approval specifications in terms of yield, quality, resistance and compliance can it obtain the species approval certificate approved and issued by the agricultural authorities, and then it can stop planting on a large scale.

In many years of experiments, it is necessary to do a number of tests and determinations, including transgenic testing. Before the field planting experiment, all seeds participating in the national or provincial experiment must undergo strict transgenic testing every year. All tests shall be sent to the qualified unit certified by the Ministry of agriculture to stop, and a formal test report shall be issued. The formal report must be provided to the Department responsible for the experimental approval. As long as it is proved that it is a non transgenic seed, it can be planted in the field.

Once it is found that it is genetically modified seeds or contains genetically modified components, the experiment will be stopped in time, let alone approved. Only from this point of view, due to the strict control of seed management departments and experimental approval departments at all levels, it is impossible for transgenic seeds to stop the experiment, let alone go through approval and planting. Therefore, at present, all kinds of fresh corn, such as sweet corn and waxy corn, which have been approved and planted in China, are not genetically modified.

Whether it is the source of quick-frozen sweet corn, the determination of transgenic, the restrictions of domestic and foreign policies and the source of seeds, it is fully proved that sweet corn is different from transgenic technology; From the perspective of sweet corn as the main vegetable and fruit of Europeans and Americans, the rumor that Americans basically don't eat quick-frozen sweet corn and even only use it as feed is broken. The rumor that quick-frozen sweet corn kernels = genetically modified has come to an end.

If you have any other questions, please feel free to contact Tangshan Hengteng Food Co., Ltd.