"Beijing oil chicken" "Beijing duck" DNA freeze preservation.

Original title: "Beijing oil chicken" "Beijing duck" DNA cryoprest preservation
(reporter Zhang Shuling) yesterday, Beijing livestock and poultry species resource bank officially put into use. The DNA of fine varieties such as Beijing oil chicken, Beijing duck and Beijing black pig is preserved at ultra-low temperature. In the future, even if these species are extinction, they can be "resurrected" by releasing their genetic material.
"Beijing oil chicken" with a good appearance of "phoenix head, hairy legs" was once popular with the public, but since the late 1970s, with the introduction of some foreign varieties, the number of oil chicken breeding in Beijing has decreased sharply, mixed varieties, endangered. Yang Yuze, head of the genetic resources protection and development section of the city's animal husbandry station, said, "Because Beijing oil chicken belongs to the egg, can not be long-term preservation of eggs, at that time long-term frozen storage of semen and other technologies are not mature, so for decades can only carry out live species."
Beijing Livestock Station since 2013 began to build a breeding library of genetic resources for livestock and poultry, after two years of resource collection in 2014 and 2015, has been selected in various breeding farms to preserve varieties, and achieved from minus 196 degrees to minus 20 degrees of full coverage operation, established blood, semen, DNA and other conventional genetic material classification, collection, transportation, pre-treatment, storage and daily monitoring norms. At present, the species resource bank has been officially put into use, in the next 15 to 20 years, can achieve the city and even the whole country all kinds of livestock and poultry semen, embryos, blood, tissue, DNA and other genetic resources preservation and data traceability.
entered the genetic resources protection and development room located at the Beijing Livestock Station, where a bronze medal engraved with the "Northern Center for Livestock and Poultry Quality Resources of the National Gene Bank" was placed indoors. A low-temperature room with more than 10 liquid nitrogen tank, tank with various labels and instructions, the temperature inside the tank is minus 196 degrees, the preservation of more than 70 Holstein cows, Simondal cattle and other excellent varieties of semen. In another low greenhouse, there are ultra-low temperature storage tanks showing minus 79 degrees, where the blood, tissue or DNA of fine livestock and poultry such as Beijing oil chickens, Peking ducks and Beijing black pigs are stored. "As long as the cryogenic preservation conditions remain the same, it can be preserved for thirty or fifty years or even forever." Staff introduction.
" protects excellent livestock and poultry resources, the equivalent of saving the lives of livestock and poultry banks. Yang Yuze felt. At present, life on Earth is extinct at the rate of three species per hour, and once extinct it will never reappear. With the acceleration of urbanization process, some poultry and livestock in this city have also experienced from scattered to large-scale breeding, livestock and poultry genetic resources serious decline of the grim situation, the loss of genetic diversity of livestock and poultry, even more than the loss of wild species diversity of human damage, so the ownership of animal and poultry genetic resources and research and development capacity, has become a measure of a country's comprehensive strength of animal husbandry and sustainable development capacity of an important indicator.
, beijing oil chicken, Beijing duck, Beijing black pig three excellent varieties of genetic resources have been income from the resource bank. At the same time, such as Beijing Bai, Jingxing Yellow Chicken 100, Beijing Red 1 and other 6 supporting systems, as well as 197 breeding farms and other excellent resources have been better protected. According to statistics, the resource bank has received 1380 blood samples and tissues of Beijing oil chickens and Ducks, and 600 copies of excellent pig blood. The library also collected 600 DNA samples of Qinghai fine-haired sheep, Karakul sheep, Tibetan sheep, small-tailed cold sheep and other species, and 120 samples of genetic resources of horse animals. "As long as we save genetic material, in the future, if needed, these genetic resources can be released, then, like Beijing oil chicken, Beijing duck, Beijing black pig, we like to eat the taste, there is no need to worry about not eating." Yang Yuze said.