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在由成年母牛克隆的小牛犊刚刚出生几天之后,日本科学家说,从成年母牛的耳朵或臀部细胞克隆牛犊的试验也将展开。日本西部的奈良国家畜产研究中心说,如果这一试验取得成功。那么这些牛犊将成为由细胞克隆而不是由动物的生殖器官繁殖而来的第一批克隆生物。该中心发言人胜彦伯太说:“目前我们正在用取自成年母牛身上不同部位的细胞进行试验,以寻求由成年牛克隆牛犊的最有效的方法。”克隆成年牛要比依靠相对不确定的胚胎细胞繁殖好.因为科学家可以选择那些已显示出有能力产奶多和肉质优的成年牛来克隆。“下一步就是找出对牛来说最轻松的方法。”伯太说。
A few days after the calf was cloned from adult cows, Japanese scientists said that experiments to clone burdock from adult cow’s ears or hip cells will also begin. Nara National Research Center for Animal Husbandry in western Japan said that if this experiment succeeds. Then these calves will become the first cloned organisms that were cloned from cells rather than from the animal’s reproductive organs. The center’s spokesperson, Hiroshi Tokio, said: “At present, we are using cells from different parts of the adult cow to conduct experiments to find the most effective method for cloning calves from adult cattle.” Cloning adult cattle is better than relying on relatives. Uncertain embryonic cells reproduce well. Scientists can choose adult cattle that have demonstrated the ability to produce more milk and have superior meat quality. “The next step is to find the easiest way for cattle.” Bert said.