Genetic Structure of Autochthonous Populations of Meso-America: Mexico

We analyze the possible effect of gene flow on the genetic structure of present-day Mexicans. For this purpose we reviewed previous admixture estimates for various Indian and Mestizo groups. Several facts seem clear: (1) There are no pure Indian groups in Mexico, because all Indian groups show varia...

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Bibliographic Details
Published in:Human biology 1996-06, Vol.68 (3), p.395-404
Main Authors: LISKER, RUBÉN, RAMÍREZ, EVA, BABINSKY, VICTORIA
Format: Article
Language:English
Subjects:
Admixtures
Albumins
Ancestry
Blood groups
Demographic aspects
Emigration and Immigration
Ethnic Groups - genetics
European Continental Ancestry Group - genetics
Gene frequency
Genes
Genetic polymorphisms
Genetics
Human genetics
Human population genetics
Humans
Indians, North American - genetics
Medical genetics
Mexicans
Mexico
Middle class
Native Americans
Native North Americans
Population
Population genetics
White people
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Summary:We analyze the possible effect of gene flow on the genetic structure of present-day Mexicans. For this purpose we reviewed previous admixture estimates for various Indian and Mestizo groups. Several facts seem clear: (1) There are no pure Indian groups in Mexico, because all Indian groups show variable degrees of admixture, mostly with whites (range, 0.088 in the Huichol to 0.373 in the Huasteco); (2) the main ancestral contribution to the noncoastal lower middle class Mestizo populations is Indian (above 50%) so that from a genetic standpoint Indians and lower middle class Mestizos are not much different; and (3) black ancestry is quite high on the coasts, ranging from 0.127 to 0.405 on the east coast, and is present in other Mestizos, ranging in large urban centers from 0.027 in Oaxaca to 0.107 in Puebla and in smaller cities from 0.08 in Tlaxcala to 0.181 in Cuanalán.
ISSN:0018-7143
1534-6617