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狗是从狼进化而来的,狼的基因究竟发生了哪些改变?为了回答这个问题,瑞典乌普萨拉大学(Uppsala University)的遗传学家克斯汀-林德布拉德-托尔(Kerstin Lindblad-Toh)教授及其同事们测出了12只来自不同地区的狼,以及60只来自14个不同品系的狗的全部基因顺序,并做了比较,将结果发表在今年1月23日出版的《自然》(Nature)杂志上。

研究显示,狗和狼的基因组之间至少有400万个单点差别(单个字母的变化),逐个研究是不现实的。于是,研究人员把注意力集中到了差别较少的基因区域,因为如果某段基因有太多的突变,说明它和动物生存的关系不会很大。最终研究范围被缩小到36个区域,研究人员从中找到了122个基因,正是这些基因发生了变化,才使得狼变成了狗。
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