ondemi Silvana, Voisin Jean-Luc, Belmaker Miriam, Moncel Marie-Hélène
Department of Biocultural Anthropology, Méditerranée University, Marseille, France.
Coll Antropol. 2010 Sep;34(3):787-95.
We compared the dental assemblage of the Rhône Valley corridor (RVC) with that of European Neandertals dating to MOIS 7-4 using two linear measurements and three indices. To test if the RVC population was significantly different from Western European Neandertals, we preformed a multi-tiered approached. First, we tested for the normality of the variables using a Shapiro-Wilks test. If the variables were normal, a stepwise Discriminant Function Analysis (DFA) (using Mahalanobis distances) was performed for the normally distributed variables. DFA uses correlation metrics to address weight combinations of variables and emphasizes between group variation while minimizing within group variation. Results show that there is no distinction between the RVC population and other Neandertals except for the Crown Module index of the upper canine. However, the presence of a single significant result does not provide evidence for a local RVC variant within the Neandertal population. These results are supported by evidence from archaeological analysis of this region. We propose that the high genetic control for dental size and shape may account for the reduced ability to distinguish between subpopulation groups based on dental dimensions in groups with small effective size such as the Neandertals.
我们使用两项线性测量和三项指数，将罗讷河谷走廊（RVC）的牙齿组合与可追溯至海洋同位素阶段（MIS）7 - 4的欧洲尼安德特人的牙齿组合进行了比较。为了检验RVC人群是否与西欧尼安德特人存在显著差异，我们采用了一种多层次方法。首先，我们使用夏皮罗 - 威尔克检验来检验变量的正态性。如果变量呈正态分布，则对正态分布变量进行逐步判别函数分析（DFA）（使用马氏距离）。DFA使用相关指标来处理变量的权重组合，并强调组间差异，同时最小化组内差异。结果表明，除了上颌犬齿的冠部模数指数外，RVC人群与其他尼安德特人之间没有区别。然而，单一显著结果的存在并不能为尼安德特人群体中存在局部RVC变体提供证据。该地区的考古分析证据支持了这些结果。我们认为，对于牙齿大小和形状的高度遗传控制，可能是导致在有效群体规模较小的群体（如尼安德特人）中，基于牙齿尺寸区分亚群体的能力下降的原因。
