| Título: | Importance of the Geographic Barriers to PromoteGene Drift and Avoid Pre- and Post-Col umbian GeneFlow in Mexican Native Groups: Evidence from Forensic STR Loci |
| Autores: | Rangel Villalobos, Héctor ; Martínez Sevilla, Victor Manuel ; Martínez Cortés, Gabriela ; Aguilar Velázquez, José Alonso ; Sosa Macías, Martha ; Rubí Castellanos, Rodrigo ; González Martín, Antonio |
| Tipo de documento: | texto impreso |
| Editorial: | John Wiley & Sons, 2016-06 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/restrictedAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias Biomédicas: Biología: Antropología biológica , Tipo = Artículo |
| Resumen: |
Objective: To analyze the origin, structure,relationships, and recent admixture in Mexican Native groups basedon 15 STRs commonly used in human identi?cation. Methods: We analyzed 39 Mexican Native population samples using STR databases based on the AmpFlSTRVRIdenti?ler kit (n=3,135), including Mexican-Mestizos (admixed),European and African populations, as reference. Results: Based upon effective population size (Ne) differences, Native groups were clustered into three regions: i)Center-Southeast groups, characterized by larger Ne, migration rate (Nm), genetic diversity (He), and relative homo-geneity principally in the Yucatan Peninsula; ii) Isolated southern groups from Chiapas and Oaxaca, characterizedby lower Ne, Nm, and He (i.e. higher isolation and genetic differentiation); iii) North-Northwest groups, which aresimilar to the previous group but are characterized by generating the widest gene ?ow barrier in the Pre-HispanicMexican territory, and currently by elevated admixture in some northern Native groups. Despite the relative congru-ence between genetic relationships with cultural, linguistic, geographic criteria, these factors do not explain thepresent-day population structure of Native groups, excepting in those linguistically related to the Mayan that showhigher homogeneity. The Isolation by distance model was demonstrated at long distances (>1,500 km), whereas geo-graphic isolation stands as a determining factor to avoid both non-indigenous admixture and bottleneck processes. Conclusions: Different dynamics of gene ?ow and drift were observed among Mexican Native groups, highlight-ing the geographic barriers (mountains, canyons and jungle regions) as the main factor differentiating Pre-hispanicpopulations, and eventually helping to avoid Post-European contact admixture and population bottleneck. |
| En línea: | https://eprints.ucm.es/41421/1/Rangel-Villalobos_et_al-2016.%20Importance%20of%20the%20geographic%20barriers.pdf |
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