俗话说“物以类聚，人以群分”，我们通常愿意与志趣相投的人成为朋友。美国一项研究显示，基因也是影响人类交友的重要因素。这一研究报告由最新一期《国家科学院院刊》（PNAS）发表。美国加利福尼亚大学圣迭戈分校医学遗传学教授詹姆斯·福勒与同事共同从事这一研究。为分析基因与人际关系联系，他们从先前两个大型人际关系研究中收集大约5000人的基因类型数据进行分析。研究人员主要关注六种基因，发现其中两种可能影响人际关系。

 

Friends feel like family? You may be genetically tied

“The whole idea of friendships is very weird,” says Fowler, whose research focuses on social networks, health and the biological basis of behavior. That’s because humans are one of the only species that forms long-term unions simply because we like each other, not just because we need to reproduce.

1. To analyze an association between genes and human relationships, the researchers, with support from the National Institute on Aging, gathered data from two large studies: the National Longitudinal Study of Adolescent Health, and a replication study in an independent sample collected from the Framingham Heart Study. Both of these long-term studies asked participants about their friendship ties and social networks.