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Anthropometric variation in west-central Mexico.

A F Christensen1

  • 1Dept. of Sociology, Anthropology, and Criminal Justice, Rutgers University, Camden, NJ, USA.

Anthropologischer Anzeiger; Bericht Uber Die Biologisch-Anthropologische Literatur
|July 10, 2001
PubMed
Summary

Biological variation among indigenous Mexican groups is surprisingly low, with recent population history and admixture playing a key role. Linguistic and geographic proximity correlated with biological closeness for Cora and Huichol populations.

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Area of Science:

  • Anthropology
  • Population Genetics
  • Bioarchaeology

Background:

  • Reanalysis of 1933 anthropometric data from five indigenous Mexican groups.
  • Comparison with existing serological and cranial non-metric data.

Purpose of the Study:

  • To investigate biological variation and population relationships among indigenous Mexican groups.
  • To assess the influence of linguistic, geographic, and historical factors on genetic diversity.

Main Methods:

  • Analysis of ten cranial and 14 postcranial measurements.
  • Calculation of bias-corrected r0 and FST values for population comparisons.
  • Examination of within-population variance (rii) and phenotypic variance.

Main Results:

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  • Overall genetic differentiation (FST) was low across groups, despite significant linguistic and historical differences.
  • Cora and Huichol populations showed close linguistic, geographic, and biological relationships.
  • Aztecas exhibited genetic drift, while Otomi and Cora showed high gene flow, indicating recent population history impacts variation more than linguistic ties.

Conclusions:

  • Recent population history, particularly non-indigenous admixture, significantly explains observed biological variation.
  • Genetic drift and gene flow patterns reveal distinct evolutionary trajectories within sampled populations.
  • Biological relatedness does not solely align with historical linguistic classifications in these Mexican indigenous groups.