Chinese scientists have succeeded in giving birth to heterozygous twins in a female Buffalo

Introduction: new page 1 Chinese scientists have successfully produced two calves of different breeds from a cow by using advanced biotechnology Dyv has only two out of 100000 twins in its natural condition The success of this technology greatly increases the possibility of obtaining twin Buffalo, which is conducive to the rapid expansion of high-quality breeding cattle According to Huang Youjun, a researcher at Guangxi Buffalo Research Institute, a female buffalo who received artificial fertilization and embryo transfer successively gave birth to twins in the Research Institute on the evening of the 22nd day after 300 days of normal pregnancy The two calves were pure Neri Raffi cattle and hybrid Mola buffalo Dyv, among them, the body weight of nerirafi is 35 kg, and that of hybrid Mora is 31 kg Two calves can walk and milk soon after landing Previously, there had been no reports of the birth of buffalo heterozygous twins in the world Dyv is a milk Buffalo, which is native to Pakistan and India, and is developing milk industry in southern China Huang said that in October last year, his research team used artificial fertilization to put the sperm of hybrid Mola cattle into the cow's body; then, using embryo transfer technology, put a blastocyst of a Neri Lafi cattle into the same cow's body, so that it will bear heterozygous twins Before blastocyst transplantation, the researchers first cultured and fertilized the ovary oocytes of nilirafei cattle in vitro, and then the fertilized eggs were cultured to become the blastocyst Another difficulty of this technique is to culture buffalo oocytes into blastocysts Because of the poor quality of buffalo oocytes, sperm capacitation in vitro is low Dyv