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Construction of worldwide database for craniofacial and dental morphology

全球颅面和牙齿形态数据库的构建

基本信息

批准号：
14405021
负责人：
HANIHARA T
金额：
$ 3.2万
依托单位：
Saga University (2004-2005)佐賀医科大学 (2002-2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

The patterns of inter- and intra-regional variation among 16 geographical groups were analyzed based on dental and cranial morphological data (totally ca.18,000 individuals from all around the world). The inter-regional variation estimated by Fst falls within the range of 12.7-18.9% (minimum Fst=10.4%) of the total variance. This range of variation is compatible with those obtained by genetic data. Subsaharan Africans show the largest intra-regional diversity among 16 major geographic groups. I test whether the diversity of subsaharan Africans is based on a function of time or on demographic parameters such as larger population size when compared with other geographic groups by applying R-matrix method. A null hypothesis that the long-term effective population sizes of different geographic regions were the same was rejected. Weighting a relative effective population size of 8.3 or more for subsaharan African series, the residual variance (the difference between observed and expected variance) becomes insignificant. After removing the potential effect of the population size, subsaharan Africans become more removed from other groups. If we accept the branching model, the results obtained from the analyses of both inter- and intra-regional variation are in agreement with the recent African model for the origin of anatomically modern humans. Taking a model for long-term migration among regions, however, the present results are not necessarily incompatible with multiregional model. It is stressed that different types of data should reflect similar patterns of inter- and intra-regional variations of modern human populations.

根据牙齿和颅骨形态学数据（来自世界各地的约18，000人），分析了16个地理组之间的区域间和区域内变化模式。通过Fst估计的区域间变异福尔斯总变异的12.7-18.9%范围内（最小Fst=10.4%）。这一变异范围与遗传数据所获得的变异范围是一致的。撒哈拉以南非洲人在16个主要地理群体中表现出最大的区域内多样性。我测试是否撒哈拉以南非洲人的多样性是基于一个函数的时间或人口参数，如较大的人口规模相比，与其他地理群体应用R-矩阵方法。拒绝了不同地理区域的长期有效种群规模相同的零假设。撒哈拉以南非洲系列的相对有效人口规模为8.3或更大，剩余方差（观察和预期方差之间的差异）变得微不足道。在消除了人口规模的潜在影响后，撒哈拉以南非洲人与其他群体的距离变得更加遥远。如果我们接受分支模型，从区域间和区域内变异的分析中获得的结果与最近非洲解剖学上现代人类起源的模型一致。然而，以一个地区间的长期迁移模型，目前的结果并不一定是不兼容的多地区模型。强调不同类型的数据应反映现代人口区域间和区域内变化的类似模式。