Kinship and post-marital residence in native populations of the South American Chaco.

The genetic structure, kinship and type of post-marital residence are studied in four native groups of the Gran Chaco, through the analysis of somatometric traits. The sample used was published by Lehmann-Nitsche (1907) and is represented by 158 individuals of both sexes. To meet the objectives, methods and techniques of multivariate statistics and population genetics of quantitative traits were applied.

Dispersion, colonization and phenotypic structure of prehistoric human populations of the Andes of North-Western Argentina.

In this article we study the phenotypic structure, biological relationships and evolutionary factors that acted on the biological diversity observed in the prehistoric groups that inhabited Northwest Argentina (NWA). The collections used belong to different subareas and periods of the development of this region. In this study 15 metric traits of the skull were used.

Phenotypic, maximum genetic, and special environmental variability in prehistoric human populations.

The phenotypic variance (V(P)) may be divided into the genetic variance (V(G)), the general environmental variance (V(Eg)), and the special environmental variance (V(Es)). The latter is estimated through repeatability calculation (b). This value is considered the upper limit of heritability and represents maximum genetic variance proportion (V(Gm) = V(G) + V(Eg)) in relation to V(P) (b = (V(G) + V(Eg))/V(P)).

Genetic drift and gene flow in a prehistoric population of the Azapa valley and coast, Chile.

The present paper studies the evolutionary process operating on prehistoric groups from the Azapa valley and coast (northern Chile). The sample consists of 237 crania from the Archaic Late, Early Intermediate, Middle, Late Intermediate, and Late periods. Six metric variables were used, which were transformed to eliminate the special environmental component and to increase the proportion of genetic variance.