Researchers at the Institute of Regenerative Medicine at Kyoto University in Japan have implanted foreign genes into mouse sperm and successfully developed young mice with foreign genetic traits. The scientists used a week-old pups to experiment and implanted foreign genes into immature spermatogonia in their testis. After the spermatogonia grew into spermatozoa, the sperm containing the foreign gene was selected. , In vitro fertilization, and then it will be placed in the mother's womb, eventually bred young mice with foreign genetic traits. Experts believe that the cultivation of transgenic animals by implanting exotic genes into sperm can significantly increase the efficiency of breeding transgenic animals compared to the use of embryonic stem cells, reducing the number of animals required by 90%. If it reaches a practical level, this technology will help establish an efficient "animal factory" and greatly reduce the cost of raising high meat quality and excreting livestock containing useful substances such as vitamins.
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