Sticky corn, also known as waxy corn, is named waxy corn because its endosperm is horny, opaque and dull after drying. Its chemical and physical properties are controlled by a single recessive gene (wx), which is located on chromosome 9. Sticky corn is gene separation and free combination, plus selective expression; Corn itself has the difference between sticky and non-sticky, rather than introducing new genes from outside, so it is not genetically modified. The official statement is that there is no GM corn in China at present, and of course there is no GM corn on the market.
Is sticky corn genetically modified?
Waxy corn originated in China. After maize was introduced into China, the hard maize planted in southwest China was mutated, and waxy type appeared gradually through artificial selection. From the scientific name of Zea mays L.sinensis Kulesh, it means "China species". Sticky corn is not genetically modified.
What's the difference between sticky corn and ordinary corn?
Sticky corn is sweet, fragrant and sticky, fresh and tender, good in taste, easy to digest and absorb, and high in trace elements. Sticky corn tastes better than ordinary corn, so many people like it.
The difference between sticky corn and ordinary corn is not the amount of sugar, but their starch structure. Just as glutinous rice and ordinary rice are mainly different in starch structure. The starch structure of ordinary corn is dextrorotatory, that is, in the long chain of starch structure, it turns to the right one by one. The starch of sticky corn is levorotatory, but it turns to the left.
Compared with ordinary corn, sticky corn is not only sweet and delicious, but also more nutritious. The nutritional value of sticky corn is1-2 times higher than that of ordinary corn, and the content of "life element" selenium is 8-10 times higher. Among the 17 amino acids, 13 is higher than that of ordinary corn.
How to choose real sticky corn?
Because ordinary corn is yellow or white, you can't stick corn completely. If a vendor holds a white corn and says it is sticky corn, be careful.
The real sticky corn is white corn with neat grains and smooth and flat surface, while ordinary white corn is irregularly arranged, with scraggy grains. In addition, the color and purple corn in the market are basically waxy corn. However, the white and yellow colors of corn particles are mixed, and the taste depends on the types of particles with more colors. For example, there are obviously more yellow particles, and its taste is biased towards sweet corn.
Question 2: Which corn is genetically modified? It is harmful for people to eat genetically modified corn. There is no harm in eating genetically modified corn.
In the United States, 94% of soybeans are genetically modified, and more than 80% of corn is genetically modified.
Advantages of transgenic plants: ① Some transgenic plants are transformed into insect-resistant genes (bt), which can greatly reduce the use of pesticides in actual cultivation, so pesticide residues will be reduced, which is of course healthier! The expression product of insect-resistant gene ... ……bt protein, if eaten raw, will completely lose its activity in 10 second (about pH =10), and humans rarely eat it raw, and it will be inactivated when heated slightly (60℃). Once it is inactivated, it is an excellent nutritional protein rich in all essential amino acids for human body, which is better than what you buy. Bt protein can kill pests only if it keeps its complete activity and binds to the specific receptors in the intestines of Lepidoptera pests. You may have heard that the snake venom of King cobra is very powerful. Like bt protein, the snake venom is highly toxic to protein. However, after it is boiled, it can be eaten casually. As long as there are no oral and esophageal ulcers, there will be no problems when eaten raw. Bt protein is many times safer than snake venom protein, and the actual dose (the actual content in transgenic plants) is extremely low! Do not believe me, you can Baidu "Foshan famous dish snake bites chicken", this dish pays attention to eating snake venom!
Many people lack relevant common sense and mistakenly think that it is toxic to insects, so it must be toxic to people. (2) Some of them are transferred with herbicide-resistant genes, which can greatly reduce the cultivation cost, so the price is lower and it is possible. Compared with non-transgenic crops, this kind of transgenic crops has obvious production advantages. Apart from the price factor, it seems to have no practical significance to consumers. ③ Some synthetic genes with special nutrients, such as golden rice, etc. It has special significance for some special people.
Question 3: How to distinguish genetically modified corn? Are all the corn sold in the market genetically modified? First of all, the naked eye can't tell whether corn is genetically modified.
If you don't trust the corn sold in the market, please go to a regular supermarket to buy it. If the product is genetically modified, it is generally indicated in the package.
Instead of worrying that genetically modified corn can cause cancer, it is better not to worry. There are carcinogenic factors everywhere in life, and there are heavy metals in the rice you eat. Because the land metal pollution is so heavy now, you can't keep eating rice with excessive cadmium or lead. PM2.5 in the air also contains carcinogenic molecules. In fact, the most toxic thing is the polluted air, which is more serious than eating a few kilograms of genetically modified corn.
Finally, by the way, not all corn is genetically modified, and most corn sold in the market is non-genetically modified. Because of China's policies, genetically modified crops have not flooded. On the contrary, food safety is much more troublesome.
Question 4: Is this genetically modified corn? How to distinguish whether it is genetically modified? Yes, it's hard to say how to distinguish. As I have experience, I can see and taste it, but I can only understand it without words! I am a farmer
Question 5: What are the advantages of genetically modified corn compared with ordinary corn? The advantage of transgenic corn is to change the original genetic characteristics through modern transgenic technology engineering and cultivate new varieties with high quality, high yield and multi-resistance. The traditional corn is very weak in insect resistance, and some pests such as corn borer can cause corn yield reduction or crop failure. In addition to pests, bacteria on pests and trauma of corn fruits will produce a corn ear rot, which is rot and mildew caused by fungi. These are the culprits that lead to a large reduction in corn production. No one wants to meet bugs or rot when eating corn.
Transgenic corn improves its resistance by changing its own genes, so it is fatal to some specific pests, but it will not hurt people to eat it. The yield of corn has a great influence on industry and animal husbandry. Therefore, it is necessary for us to develop transgenic corn.
Question 6: What are the main agricultural varieties of transgenic corn seeds in 20 1 1 year? 1. Huanghuaihai area (1) Zhengdan958: This variety is suitable for planting in the summer corn area of Huanghuaihai in China. Jundan 20: It is suitable for planting in summer sowing areas in Henan, Shandong, central and southern Hebei, Shaanxi, Anhui, Jiangsu, and Yuncheng, Shanxi, as well as in areas with active accumulated temperature of ≥ 10℃ and above 3000℃ in Inner Mongolia. (3) Ludan 98 1: Suitable for planting in summer sowing areas in Shandong, Henan, Hebei, Shaanxi, Anhui, Jiangsu and Shanxi Yuncheng. Jinhai No.5: This variety is suitable for summer sowing and planting in Yuncheng, Henan, Hebei, Shandong, Shaanxi, Jiangsu, Anhui and Shanxi, and should be used with caution in areas with high incidence of leaf diseases and smut. (5) Jingdan 28: It is suitable for planting in Beijing, Tianjin, summer maize planting areas in Hebei Province, areas with active accumulated temperature above 2750℃ in Inner Mongolia ≥ 10℃, and the upper limit of the first accumulated temperature zone in Heilongjiang. (6) Zhongke 1 1: Suitable for planting in summer corn areas in Hebei, Henan, Shandong, Shaanxi, northern Anhui, northern Jiangsu and Yuncheng, Shanxi. (7) Akebia 16: It is suitable for planting in summer corn areas in Hebei, Shaanxi, Anhui, Henan, Beijing, middle-late maturing areas in Jilin and areas with active accumulated temperature of ≥ 10℃ and above 3000℃ in Inner Mongolia. (8) Shendan 16: Suitable for planting in spring sowing areas in Liaoning, Ningxia, Gansu, Xinjiang, western Inner Mongolia and summer sowing areas in Shandong, Henan, Shaanxi and Hebei. (9) SEAO 20: It is suitable for planting in Jiangsu along the Yangtze River and Jiangsu, Anhui and Huaihe River basins. (X) Era 1No.: It is suitable for popularization and utilization as a summer maize variety in Tianjin. 2. Southwest China (1) Chuandan 4 18: Suitable for planting in Pingba hills and low mountainous areas in Sichuan, Chongqing, Guizhou, Hunan and Yunnan. (2) Dongdan 80: It is suitable for spring sowing in Liaoning, Jilin late-maturing area, Beijing, Tianjin, northern Hebei, Shanxi and Pingba hills and low mountainous areas in Yunnan, Guizhou, Sichuan, Chongqing, Hunan, Hubei and Guangxi, and attention should be paid to the prevention and control of underground pests. (3) Akebia 16: It is suitable for planting in summer corn areas in Hebei, Shaanxi, Anhui, Henan, Beijing, middle-late maturing areas in Jilin and areas with active accumulated temperature of ≥ 10℃ and above 3000℃ in Inner Mongolia. (4) Zhengda 6 19: It is suitable for planting in the main corn producing areas in Guangxi. (5) Guidan No.8: It is suitable for planting in medium and high fertility soils in Guiyang, Anshun, Bijie, Liupanshui and Southwest Guizhou. Use with caution in areas with frequent head smut. (6)No. Denghai 1 1: It is suitable for planting in summer corn areas in Hebei, Henan, Shandong, Shaanxi, northern Jiangsu, northern Anhui, Sichuan, Chongqing and other suitable areas, but it should be used with caution in epidemic areas of dwarf mosaic and Curvularia leaf spot. (7) Chengdan 30: It is suitable for planting in Pingba, hilly and mountainous areas of Sichuan Province, and it can be intercropped with wheat stalks or pure cropping. (8) Zhongdan 808: planted in the mountainous area around Sichuan Basin. Third, the northern region (1) Zhengdan 958: It is suitable for planting in the summer corn area of Huanghuaihai and Beijing, Hebei, Inner Mongolia, Shanxi, Liaoning, Jilin, Heilongjiang and Xinjiang. (2) Jidan 27: It is suitable for early-maturing areas such as the east and west of Jilin Province and the upper limit of the second accumulated temperature zone in Heilongjiang Province. (3) Liaodan 565: It is suitable for planting in the planting area of Benyu 9 in Liaoning, Jilin, Heilongjiang and Tongliao, Inner Mongolia, and in the areas determined by Beijing, Tangshan, Hebei and Inner Mongolia. (4) Longdan 38: It is suitable for planting in the second accumulated temperature zone in Heilongjiang Province and related areas in Inner Mongolia. (5) Suiyu 10: Suitable for planting in the lower limit of the second accumulated temperature zone in Heilongjiang Province and related areas in Inner Mongolia. (6) Reclamation 3: It is suitable for planting in the mountainous area in eastern Liaoning, the middle-late maturing area in eastern Jilin, the upper limit of the first accumulated temperature zone in Heilongjiang, and the planting area of Sidan 19 varieties in Chifeng, Inner Mongolia. (7) Zhedan 37: Suitable for planting in the third accumulated temperature zone of Heilongjiang Province. (8) Nonghua 10 1: It is suitable for spring sowing and planting in Beijing, Tianjin, northern Hebei, middle and late maturing areas in Shanxi, middle and late maturing areas in Liaoning, late maturing areas in Jilin, Chifeng area in Inner Mongolia and Yan 'an area in Shaanxi, and summer sowing in Shandong, Henan (excluding Zhumadian), south-central Hebei, Guanzhong irrigation area in Shaanxi, northern Anhui and Yuncheng area in Shanxi.
Question 7: What are the disadvantages of eating genetically modified corn? Most of the genetically modified corn has been transformed into bt gene. After this gene is transformed, this genetically modified corn can produce a bt protein that is extremely toxic to corn borer, but this protein is harmless to people, and it can even be used as the best source of protein for people, or this protein is more nutritious than Amway protein powder bought by some people for thousands of yuan.
Therefore, this transgenic corn has the characteristics of high resistance to corn borer, so the amount of pesticides can be greatly reduced in cultivation, thus reducing pesticide residues.
If people eat this genetically modified corn, it is safer than eating the same variety of non-genetically modified corn.
I told you, and you don't understand!
Question 8: Is the corn made in China a genetically modified variety? At present, there is only one variety of genetically modified corn imported from our country, and most of the corn is not genetically modified.