Detection of a population replacement at the Classic–Postclassic transition in Mexico
| Autor: | Josefina Bautista-Martínez, Rolando González-José, Antonio González-Martín, Miquel Hernández, Jorge Gómez-Valdés, Neus Martínez-Abadías, Mirsha Quinto |
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| Rok vydání: | 2006 |
| Předmět: |
MEXICA
GEOMETRIC MORPHOMETRICS Mesoamerica POPULATION REPLACEMENT media_common.quotation_subject Population Dynamics Craniology Population Replacement CLASSIC-POSTCLASSIC TRANSITION General Biochemistry Genetics and Molecular Biology Source Population Ciencias Biológicas MESOAMERICA Cluster Analysis Humans Mexico History Ancient History 15th Century General Environmental Science media_common Anthropometry General Immunology and Microbiology Skull Empire Facial morphology General Medicine History Medieval Genealogy Gene exchange FACIAL SHAPE Genetics Population Phenotype Geography Facial pattern Otros Tópicos Biológicos General Agricultural and Biological Sciences CIENCIAS NATURALES Y EXACTAS Research Article |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences. 274:681-688 |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2006.0151 |
| Popis: | The Mexica Empire reached an outstanding social, economic and politic organization among Mesoamerican civilizations. Even though archaeology and history provide substantial information about their past, their biological origin and the demographic consequences of their settlement in the Central Valley of Mexico remain unsolved. Two main hypotheses compete to explain the Mexica origin: a social reorganization of the groups already present in the Central Valley after the fall of the Classic centres or a population replacement of the Mesoamerican groups by migrants from the north and the consequent setting up of the Mexica society. Here, we show that the main changes in the facial phenotype occur during the Classic–Postclassic transition, rather than in the rise of the Mexica. Furthermore, Mexica facial morphology seems to be already present in the early phases of the Postclassic epoch and is not related to the northern facial pattern. A combination of geometric morphometrics with Relethford–Blangero analyses of within- versus among-group variation indicates that Postclassic groups are more variable than expected. This result suggests that intense gene exchange was likely after the fall of the Classic and maybe responsible for the Postclassic facial phenotype. The source population for the Postclassic groups could be located somewhere in western Mesoamerica, since North Mexico and Central Mesoamerican Preclassic and Classic groups are clearly divergent from the Postclassic ones. Similarity among Preclassic and Classic groups and those from Aridoamerica could be reflecting the ancestral phenotypic pattern characteristic of the groups that first settled Mesoamerica. Fil: González José, Rolando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Martínez Abadías, Neus. Universidad de Barcelona; España Fil: González Martín, Antonio. Universidad Complutense de Madrid; España Fil: Bautista Martínez, Josefina. Instituto Nacional de Antropología e Historia; México Fil: Gómez Valdés, Jorge. Instituto Nacional de Antropología e Historia; México Fil: Quinto Sánchez, Mirsha Emmanuel. Universidad Autónoma del Estado de Hidalgo. Área Académica de Historia y Antropología; México Fil: Hernández, Miquel. Universidad de Barcelona; España |
| Databáze: | OpenAIRE |
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