The transgenic crops have a variety of new and excellent qualities, characterized by the use of bioengineering technology to embed one species gene into another. The current genetic engineering methods are mainly the following: 1. First select the DNA fragment of the desired characteristics so that it can be introduced into the crop. A spiral DNA strand called a cytoplasmic heritium is then extracted from the soil bacteria, the cytoplasmic genetic circle is cut to embed the desired characteristic DNA fragment in the loop, and the reconstituted cytoplasmic genetic circle is moved back to the soil. Bacteria. 2. For example, to transform a tomato, a piece of tomato leaf is immersed in the soil bacteria solution to facilitate the affinity between the soil bacteria and the tomato cells. This transfers the altered cytoplasmic herpes to the plant cell DNA strand. 3. Once the exogenous DNA is transplanted into the nucleus of the crop, it becomes the chromosomal component of the plant. 4. The researchers then cultivate the plant cell until it splits and produces a new plant. At the same time, newborn plants carry foreign DNA encoded for their genes. 5. Plants with new properties can be cultivated. Since U.S. agricultural workers have adopted the first batch of bioengineering technologies listed on the market to improve crop varieties, researchers are also developing other crops that can greatly improve the quality of crops, have health-care medical effects, and produce high-quality fiber. For example: Herbicide Resistant Crops: In 1996 Monsanto Biotech began marketing genetically modified soybeans, a new type of soybean that has the ability to withstand a
Common herbicide produced by the company. Monsanto and Hoist Company also introduced herbicide-resistant corn. Biologically improved new feeds: Soon, people can feed poultry and cows with bio-modified feeds to provide better protein for humans and help animals absorb phosphorus. Bio-improved feed can produce two benefits, that is, it can reduce the cost of feed, but also reduce the phosphorus content of animal faeces, which is conducive to the protection of the ecological environment. Healthy foods: DuPont and Monsanto will soon launch a variety of soybeans that can extract heart-friendly edible oils. The two companies will also jointly launch new varieties of fortified soybeans that are more delicious and easier to digest. Crops containing natural pesticides: U.S. researchers have been planting a genetically modified cotton since 1996. This cotton contains a gene that is deadly to cotton bollworms and cockroaches from bacteria. Scientists are still creating corn and potatoes containing natural insecticide genes. Disease-Resistant Crops: Elm is working with other companies to study tomatoes with high levels of anti-cancer substances, as well as corn and soybeans that can be used to produce hemoglobin. DuPont is studying how to make soybeans contain isoflavones, which people can use to prevent heart attacks. In addition, bananas and potatoes containing vaccines are also being researched. Special transgenic cotton and corn: Monsanto is using bio-engineering technology to improve cotton so that it produces natural blue and yellow-brown fibers for use in textile fabrics. A microbe developed by DuPont helps to produce super-elastic polyester fibers in cotton, while Cargill and Dow Chemical plan to extract plastic from corn.
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