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蓝海人类学在线 Ryan WEI's Forum of Anthropology

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人类选择有相似DNA的人做朋友

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发表于 2013-9-9 20:02 | 显示全部楼层 |阅读模式
我们趋向于选择与自己相似的人交朋友——即所谓的同质性现象。一项新研究发现(预印本),这种相似性甚至深入到基因层面。这是耶鲁大学和加州圣迭戈分校研究人员在分析了2000名美国人基因组后得出的结论。他们发现,相比不认识的陌生人,朋友之间的遗传相似性极为显著。研究结果支持了一项有三十年历史的假说:一个人的基因会驱使他们寻找相容于他们表型的环境。有相似基因的人应该是生于相似的环境,因此更可能成为朋友。
 楼主| 发表于 2013-9-9 20:03 | 显示全部楼层
Friendship and Natural Selection
Nicholas A. Christakis, James H. Fowler
(Submitted on 23 Aug 2013)

    More than any other species, humans form social ties to individuals who are neither kin nor mates, and these ties tend to be with similar people. Here, we show that this similarity extends to genotypes. Across the whole genome, friends' genotypes at the SNP level tend to be positively correlated (homophilic); however, certain genotypes are negatively correlated (heterophilic). A focused gene set analysis suggests that some of the overall correlation can be explained by specific systems; for example, an olfactory gene set is homophilic and an immune system gene set is heterophilic. Finally, homophilic genotypes exhibit significantly higher measures of positive selection, suggesting that, on average, they may yield a synergistic fitness advantage that has been helping to drive recent human evolution.

Subjects:         Genomics (q-bio.GN)
Cite as:         arXiv:1308.5257 [q-bio.GN]
          (or arXiv:1308.5257v1 [q-bio.GN] for this version)

http://arxiv.org/abs/1308.5257
发表于 2013-9-11 15:35 | 显示全部楼层
感觉又多了一条要被泛基因主义者滥用的法则。这些都是民科大做文章的源泉啊。

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发表于 2013-9-11 15:48 | 显示全部楼层
这个结论得出来的是否有问题,本身同乡同种同族的人因为天生的联系而更多的联系交往,而同乡同种同族者的基因的相似性本身就大啊。
发表于 2013-9-11 15:49 | 显示全部楼层
“人类选择有相似DNA的人做亲戚”
发表于 2013-9-12 11:00 | 显示全部楼层
恕我直言 这个结论似乎有点扯淡。
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