一个部落群体——亚诺玛米印第安人的遗传结构。第十四部分。渐变群及其解读。
The genetic structure of a tribal population, the Yanomama Indians. XIV. Clines and their interpretation.
作者信息
Ward R H, Neel J V
出版信息
Genetics. 1976 Jan;82(1):103-121. doi: 10.1093/genetics/82.1.103.
The Yanomama Indians are a South American tribe distributed over an irregular area approximately 200 X 300 miles. The gene frequencies observed at 12 loci in 47 villages within this area have been analyzed for the occurrence of clines. Apparently significant clines are observed for alleles of the Rh, MNSs, Kidd, Gm, Inv and serum albumin system. Available data concerning recent tribal expansion and admixture permit a tentative analysis of the causes of these clines. Although the action of selection cannot be rigorously excluded, it seems unlikely to be the major couse. Admixture with surrounding tribes plays a role which can be quantified because of the fortuitous cicumstance of two genetic markers for admixture. It is suggested that an important factor in the origin of these clines is the manner in which the tribe has recently expanded through successive village fissionings and a predominantly centrifugal pattern of village migration.
亚诺玛米印第安人是一个分布在南美洲一片约200×300英里不规则区域的部落。对该区域内47个村庄12个基因座上观察到的基因频率进行了分析，以研究渐变群的出现情况。在Rh、MNSs、基德、Gm、Inv和血清白蛋白系统的等位基因中明显观察到了显著的渐变群。关于该部落近期扩张和混合的现有数据允许对这些渐变群的成因进行初步分析。虽然不能严格排除选择作用，但它似乎不太可能是主要原因。与周边部落的混合起到了一定作用，由于存在两个用于混合的遗传标记这一偶然情况，这种作用可以被量化。有人提出，这些渐变群起源的一个重要因素是该部落近期通过连续的村庄分裂以及以主要为离心模式的村庄迁移而进行扩张的方式。
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