1
artículo
Publicado 2016
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The present study focuses on the genetic history of the Quechua-Lamistas, inhabitants of the Lamas Province in the San Martin Department, Peru, who speak a peculiar dialect of the Quechua language related to the Ecuadorian Quichua. It has been suggested that different pre-Columbian ethnic groups from the Peruvian Amazonia, like the Motilones or “shaven heads”, assimilated the Quechua language and then formed the current native population of Lamas. However, many Quechua-Lamistas claim to be direct descendants of the Chankas, a famous pre-Columbian indigenous group that escaped from the Inca rule in the Andes. To investigate the Quechua-Lamistas and Chankas’ ancestries, we compared uniparental genetic profiles (17 STRs of Y-chromosome Q-M3 and complete mtDNA control region haplotypes) among autochthonous Amazonian and Andean populations from Peru, Bolivia and Ecuador. The phylogeogra...
2
artículo
El cromosoma Y humano contiene marcadores altamente informativos para hacer inferencias históricas sobre el poblamiento precolombino de América. Sin embargo, la escasez de estos marcadores ha limitado su uso en la inferencia de ascendencia compartida y las migraciones pasadas pertinentes al origen de las diversidades cultural y biológica nativos americanos. Para identificar nuevos polimorfismos de nucleótido único (SNP) y aumentar la resolución filogenética del haplogrupo Q importante encontrado en las Américas, hemos realizado una búsqueda de nuevos polimorfismos basados en la secuenciación de los cromosomas Y divergentes identificados por análisis de haplotipos de microsatélites. Con este enfoque, un nuevo Y-SNP (SA01) ha sido identificado en las poblaciones andinas de América del Sur, lo que permite la detección de una nueva sublinaje de Q1a3a. Este sublinaje muestra una...
3
artículo
Publicado 2018
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The Americas were the last inhabitable continents to be occupied by humans, with a growing multidisciplinary consensus for entry 15–25 thousand years ago (kya) from northeast Asia via the former Beringia land bridge [1, 2, 3, 4]. Autosomal DNA analyses have dated the separation of Native American ancestors from the Asian gene pool to 23 kya or later [5, 6] and mtDNA analyses to ∼25 kya [7], followed by isolation (“Beringian Standstill” [8, 9]) for 2.4–9 ky and then a rapid expansion throughout the Americas. Here, we present a calibrated sequence-based analysis of 222 Native American and relevant Eurasian Y chromosomes (24 new) from haplogroups Q and C [10], with four major conclusions. First, we identify three to four independent lineages as autochthonous and likely founders: the major Q-M3 and rarer Q-CTS1780 present throughout the Americas, the very rare C3-MPB373 in South Am...
