The first successful embryo transfer of Australian Holstein cows in Guangxi

Introduction: Nanning, Jan 6 (reporter Wang Mian): Guangxi Animal Husbandry Research Institute has received good news recently: its yellow cattle research lab successfully gave birth to a 48kg calf with the Australian Holstein cow as the donor for embryo transfer This marks the first successful application of embryo transfer technology to breed Australian Holstein cows in Guangxi Relevant experts believe that the successful application of this technology will mean that the Australian Holstein cow, a fine breed, can be widely propagated in subtropical areas of China, so as to end the history of milk in these areas and promote the efficient development of milk industry At the same time, it will have a positive impact on optimizing the structure of animal husbandry in these areas Australian type Holstein cows belong to the subtropical small and medium-sized high-quality cows, which are different from ordinary Holstein cows in temperate zone This kind of cow is heat-resistant, the blood protozoa disease never touches the body, the hoof is not easy to rot in the rainy season, the postpartum mastitis is less, it can be farmed and grazed, and it is suitable for the growth of subtropical areas In addition, each Australian Holstein cow has an annual output of 4500-5000 kg of fresh milk, of which the milk fat rate is 3.7% - 4% and the dry matter content is 13% - 14% The milk is rich in flavor, good in taste and has a broad market prospect Most of the cows in the subtropical region of China are hybrids of temperate cows or local cows The milk fat rate is only 2.8% - 3.2%, and the dry matter content of milk is only about 10% Moreover, the milk moisture content is much, therefore the taste is light and not fragrant Mo Kaoshi, a senior animal husbandry teacher at Guangxi Animal Husbandry Research Institute, told reporters that bovine embryo transfer is to inject biological hormones into the donor cattle to superovulate, and then carry out artificial insemination, wash out the fertilized eggs, and put them into other estrous cows to "produce by abdomen" Guangxi introduced several Australian type Holstein cows from Australia and New Zealand in the early 1990s However, due to the technical conditions and environmental constraints, natural fertilization has been the only way for a long time Such an Australian type Holstein cow can only reproduce one cub per year at most The successful application of embryo transfer technology means that an Australian Holstein cow can be used as a donor to supply 20 embryos a year It is one of the contents of the structural adjustment of animal husbandry in Guangxi to improve the breed of dairy cattle and develop the efficient milk industry At present, Australian Holstein cows have been listed in the list of famous and special breeds in Guangxi.