The first large-scale embryo transfer in China
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Last Update: 2002-07-22
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Source: Internet
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Author: User
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Introduction: Dr Li Shujing and Dr Yu Wenli from China Agricultural University have used the Holstein cow embryo introduced from Canada to make the local cow in Mudanjiang City, Heilongjiang Province pregnant At present, 500 embryo cows have been transferred, and 500 will be transferred in August, making the total number of embryo cows reach 1000 These cows will give birth in April and may next year, and gradually improve the dairy breed in Heilongjiang Province The so-called cow embryo transfer refers to the storage of the developed cow embryo in the liquid nitrogen freezing tank, thawing in the laboratory, separating under the microscope, and then transferring to the uterus of the local cow So the local cow is the birth mother of the calf, but it has no blood relationship with the calf The advantage of this method is that it can preserve the foreign high-quality cow breeds, so that the local cow breeds can be completely evolved The breeding base of improved breed cattle of Mudanjiang Longda Co., Ltd covers an area of more than 4000 hectares, and its scale and technical level rank first in China Holstein cows in Canada are the largest milk producing breed in the world Each cow has an annual milk output of more than 10 tons, and each embryo is worth 2000 yuan After the calves are transplanted and bred, they can replace the local cows whose annual milk output is only 3 tons, and greatly improve the milk output of the cows Dr Li Wenjing and Dr Yu Wenli are well-known experts in animal embryo transfer in China The technology they use can be directly implanted into the uterus of local cows without cutting In the past, cow embryo transfer was carried out door to door in China, with no more than 2300 cows at most Such large-scale cow embryo transfer is the first time in China (author:) share to feed Weibo share to:
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