China's first batch of genetically modified cloned cattle producing domestically-made snowflake beef is expected to be on the dining table

In the near future, the quality beef that has been genetically cloned is expected to embark on the dinner table of the Chinese people.

According to the Xinhua News Agency reported on September 14, the first batch of somatic cell cloned cattle “niu Niu” born with fat-fat connexin gene (FABP) in 2012 was successfully bred and the second generation “genetically modified calf” was born after birth. Normal signs and good health. This means that China's application of somatic cell cloning technology has taken a key step in breeding new breeds of beef cattle. The Chinese people are expected to eat homemade "snowflake beef" as soon as possible.

The first generation of genetically modified calf is drinking milk

The head of the State's major genetically modified project, “The Cultivation of New Variety of High Quality and Highly Effective Genetically Modified Beef Cattle”, and Ni Hemin, a professor at the Animal Science and Technology College of Beijing Agricultural University, said that this second generation of genetically modified calves was hard-won, and her mother “Niuniu” passed the team for 3 years. The hard work was born on August 1, 2012 at the Beijing Agricultural College Comprehensive Test Base. When she was born, she was physically weak and unable to take the initiative to eat. After being carefully taken care of by team members, Niuniu reached sexual maturity and could perform the task of breeding offspring. .

On November 2, 2014, the team prepared Qinchuan Cattle Frozen Semen supplied by the National Animal Husbandry Station Germplasm Resources Protection Center for “Niu Niu” and artificially inseminated it to complete breeding. After 299 days, she finally gave birth to her second-generation “genetically modified calf” in the early morning of August 28 this year, weighing 17 kg and female. As of September 12, the calf had been full for half a month and had normal physical signs and physical health.

Ni Hemin said that this proves that China's technology has achieved three major breakthroughs: First, the transgenic cattle obtained through somatic cell cloning technology has a normal breeding function, indicating that cloned cattle can expand its population; Second, through the calf The gene containing the fatty adiponectin gene has been bred in the body and has been stably integrated, indicating that the gene can be passed on from generation to generation. Third, it indicates the biological environment in the soil and the microorganisms in the soil surrounding the genetically modified cattle house. For the determination of eco-environmental indicators, no genetically modified cattle were found to have adverse effects on the surrounding environment. These illustrate that the somatic cell cloning technology production system can be used for the safe production of transgenic animals. According to the observers' network, a total of 200 cows were selected for development in this study, and the reconstructed embryos were implanted in more than 80 cows in two batches. Three months later, seven were diagnosed with pregnancy, and two of them were miscarried in four months and six months respectively. In the end, two calves that were co-survived were cows. The first one was born on July 19, 2012. It was one of the twins born late (the earlier one had been born) and was fed by artificial feeding. The second calf was born on August 1, 2012.

At that time, Ni Hemin said that although there are five major cattle in China, there is no world-recognized meat variety. “The current widespread problem of meat products in China is the low rate of meat production and the quality of meat is not high,” says Professor Ni Hemin. Beef is the best among the muscles that contain a certain amount of fat, which is commonly known as the marble pattern. Beef. Not all varieties can produce marbled beef, especially lean varieties are difficult to achieve. Research on genetically modified cloned cattle is to improve the quality of beef. In China, Qinchuan beef cattle, Luxi cattle, and Yanbian beef cattle are among the best breeds of yellow cattle.

According to experts, one of the key factors in the quality of beef is the inter-muscle fat content. The characteristics of beef consumption are different from those of pork. Pork is better and better, and beef is the best among the muscles that contain a certain amount of fat, which is commonly known as "marbling marbled beef". Its taste and nutrition are loved by consumers. Currently, it is mainly imported, and the price is higher.

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