2000 2006 What animals were cloned in China 20

1. Not long ago, under the joint research of Hebei Agricultural University and the Biotechnology Research Center of Shandong Academy of Agricultural Sciences, Chinese scientists and technicians successfully cloned two little white rabbits - "Lu Xing" and "Lu Yue" through an experimental project called "Research on the Isolation and Cloning of Embryonic Stem Cells of Primitive Germ Cells of Livestock". This experiment shows that China has successfully mastered embryo cloning, and although it has not yet reached the level of somatic cell cloning sheep "Dolly" in technology, it has laid the foundation for the advancement of cloning technology in China.

Later, the Institute of Animal Reproduction of Guangxi University in China successfully bred cloned rabbits that were larger than ordinary rabbits. Because rabbits are closer to human physiology, the successful birth of cloned rabbits is helpful for human medical research.

On May 27, China Agricultural University cooperated with Beijing Geneda Technology and Hebei Lutai Farm to successfully clone the first high-quality cattle in China, the red line of Hebei cattle, through somatic cell cloning technology. This somatic cell cloning scalper named "Bova" has been identified by authoritative departments, and some of the cloning technical indicators have reached the international level. Hebei cattle is a unique and excellent local cattle breed in China, distributed in Hebei, China, the main characteristics are cold-resistant, meat and less fat.

But now the number has declined dramatically and is on the verge of extinction. The successful cloning has a far-reaching impact on the protection of endangered species in China.

At noon on October 16, China's first somatic cell cloned cow bred by vitrification technology was born in Liangshan County, Shandong Province.

The nuclear donor of this cloned cow comes from the ear fibroblasts of a high-quality black and white cow that produces more than 10 tons of fresh milk per year. The cloned embryos were vitrified and transferred to a Luxi cow, and after 281 days, a healthy black and white cow was born at 11:52 on October 16, 2002. The cloned cow weighed 40 kilograms at birth, was 80 centimeters tall, had a body length of 72 centimeters, a chest circumference of 80 centimeters, and a tube circumference of centimeters.

Colostrum at 14:20 on the same day, and began to stand at 14:30, and could bark, lie down, and jump that night, which was no different from the signs of a normally born cow. This is the first somatic cell cloned cow bred by vitrification technology in China. Prior to this, China had been using fresh embryo transfer technology, and there was no precedent for successful cloning using freezing technology.

Are there cloned animals in our country.

Scientists' attempts to replicate the ideal of life are not a recent phenomenon, and their scientific experiments on replicating life have not been carried out on higher animals such as cows, sheep, and monkeys from the beginning.

Long before the appearance of cloned sheep in the United Kingdom and cloned monkeys in the United States, there were also a variety of cloned animals in China.

On April 19, 1980, the world's first duplicate crucian carp without parents was born at the Wuhan Institute of Hydrobiology, Chinese Academy of Sciences. The researchers first cultured the blastocyst cells of crucian carp under artificial conditions, and after 385 days and 59 consecutive subcultures, the cysts were removed under a microscope with a fine glass needle of about 10 microns

In 2006, the Academy of Animal Science of Anhui Agricultural University successfully cloned a cloned sheep named "Dongba".

There are sheep, pigs, but the main thing is the son.

On January 15, 2004, he successfully spent 100 days at Laiduyang Agricultural College in Bai Province, Shandong Province. Also, the same.

DAO: The first and second cases of healthy living cell cloned cattle "Kangkang" and "Shuangshuang" and their autologous breeding offspring "Zhuangzhuang" and "Jianjian" cultivated by Laiyang Agricultural College are currently in good health.

In the experimental field of the Animal Embryo Engineering Research Center of Laiyang Agricultural College, researchers put red silk flowers on "Beibei". "Beibei" and "Jianjian" and "Zhuangzhuang" jumped out of the cowhouse together, and the three calves began to have fun outside.

Under the auspices of Dr. Dong Yajuan, Professor Bai Xuejin and other scientific researchers from Laiyang Agricultural College, the first and second cases of healthy living cell cloned cattle "Kangkang" and "Shuangshuang" in China were born successively. The embryos of the two cloned cows were vitrified and then transferred into the uterus of Chinese black and white cows. Among them, the embryos of "Shuangshuang" developed successfully.

On the day, the world's first vitrified ultra-rapid cryopreserved somatic cell cloned cow superovulation embryo transfer calf "Beibei" was successfully born. After that, "Shuangshuang" gave birth to "Jianjian" on the day of that year, and "Kangkang" gave birth to "Zhuangzhuang" on the day of that year.

Goat. Rabbit.

Cows, cattle.

Pig. Mouse. Bull calves.