Discrepancy between cranial and DNA data of early Americans: Implications for American peopling

Currently, one of the major debates about the American peopling focuses on the number of populations that originated the biological diversity found in the continent during the Holocene. The studies of craniometric variation in American human remains dating from that period have shown morphological d...

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Autores principales: Pérez, Sergio Iván, Bernal, Valeria, González, Paula N., Sardi, Marina Laura, Politis, Gustavo Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Naturales
craniometry
morphological trait
phenotypic plasticity
physical anthropology
cephalometry
genetics
histology
sexual development
Holoceno
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/35356
http://www.plosone.org/article/fetchObject.action?uri=info%3Adoi%2F10.1371%2Fjournal.pone.0005746&representation=PDF
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-35356
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
craniometry
morphological trait
phenotypic plasticity
physical anthropology
cephalometry
genetics
histology
sexual development
Holoceno
Argentina
spellingShingle Ciencias Naturales
craniometry
morphological trait
phenotypic plasticity
physical anthropology
cephalometry
genetics
histology
sexual development
Holoceno
Argentina
Pérez, Sergio Iván
Bernal, Valeria
González, Paula N.
Sardi, Marina Laura
Politis, Gustavo Gabriel
Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
topic_facet Ciencias Naturales
craniometry
morphological trait
phenotypic plasticity
physical anthropology
cephalometry
genetics
histology
sexual development
Holoceno
Argentina
description Currently, one of the major debates about the American peopling focuses on the number of populations that originated the biological diversity found in the continent during the Holocene. The studies of craniometric variation in American human remains dating from that period have shown morphological differences between the earliest settlers of the continent and some of the later Amerindian populations. This led some investigators to suggest that these groups - known as Paleomericans and Amerindians respectively - may have arisen from two biologically different populations. On the other hand, most DNA studies performed over extant and ancient populations suggest a single migration of a population from Northeast Asia. Comparing craniometric and mtDNA data of diachronic samples from East Central Argentina dated from 8,000 to 400 years BP, we show here that even when the oldest individuals display traits attributable to Paleoamerican crania, they present the same mtDNA haplogroups as later populations with Amerindian morphology. A possible explanation for these results could be that the craniofacial differentiation was a local phenomenon resulting from random (i.e. genetic drift) and non-random factors (e.g. selection and plasticity). Local processes of morphological differentiation in America are a probable scenario if we take into consideration the rapid peopling and the great ecological diversity of this continent; nevertheless we will discuss alternative explanations as well.
format Articulo
Articulo
author Pérez, Sergio Iván
Bernal, Valeria
González, Paula N.
Sardi, Marina Laura
Politis, Gustavo Gabriel
author_facet Pérez, Sergio Iván
Bernal, Valeria
González, Paula N.
Sardi, Marina Laura
Politis, Gustavo Gabriel
author_sort Pérez, Sergio Iván
title Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
title_short Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
title_full Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
title_fullStr Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
title_full_unstemmed Discrepancy between cranial and DNA data of early Americans: Implications for American peopling
title_sort discrepancy between cranial and dna data of early americans: implications for american peopling
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/35356
http://www.plosone.org/article/fetchObject.action?uri=info%3Adoi%2F10.1371%2Fjournal.pone.0005746&representation=PDF
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