//Native Americans

“The indigenous peoples of the Americas are the descendants of the pre-Columbian inhabitants of the Americas. Pueblos indígenas (indigenous peoples) is a common term in Spanish-speaking countries. Aborigen (aboriginal/native) is used in Argentina, whereas “Amerindian” is used in Quebec, The Guianas, and the English-speaking Caribbean.[21][22][23][24] Indigenous peoples are commonly known in Canada as Aboriginal peoples, which include First Nations, Inuit, and Métis peoples.[25] Indigenous peoples of the United States are commonly known as Native Americans or American Indians, and Alaska Natives.[26]

According to the prevailing theories of the settlement of the Americas, migrations of humans from Asia (in particular North Asia)[27][28] to the Americas took place via Beringia, a land bridge which connected the two continents across what is now the Bering Strait. The majority of experts agree that the earliest pre-modern human migration via Beringia took place at least 13,500 years ago.[29] These early Paleo-Indians spread throughout the Americas, diversifying into many hundreds of culturally distinct nations and tribes. According to the oral histories of many of the indigenous peoples of the Americas, they have been living there since their genesis, described by a wide range of creation myths.” — Wikipedia

How strong was the bottleneck associated to the peopling of the Americas? New insights from multilocus sequence data

In spite of many genetic studies that contributed for a deep knowledge about the peopling of the Americas, no consensus has emerged about important parameters such as the effective size of the Native Americans founder population.

2018-05-07T11:44:10+00:00 May 7th, 2018|

Ancient maternal lineages in hunter-gatherer groups of Argentinean Patagonia. Settlement, population continuity and divergence

Both archaeological and bioanthropological hypothesis suggest a common population origin for the region, and point that their biological differences would stem from genetic drift, geographic isolation and adaptation to the environment. In this study we analyze HVR-1 mitochondrial sequences from 70 ancient and 306 extant samples from native groups with the aim to test these hypotheses

2017-11-25T12:18:31+00:00 November 25th, 2017|

Genetic studies of the peopling of the Americas: What insights do diachronic mitochondrial genome datasets provide?

Here we briefly review the evidence for current hypotheses on the peopling process of the Americas and discuss how ancient mitochondrial DNA can provide a unique temporal perspective.

2017-06-22T13:52:27+00:00 June 22nd, 2017|

Antiquity of mtDNA lineage D1g from the southern cone of South America supports pre-Clovis migration

The discovery of the Monte Verde site was revolutionary; it led to wide acceptance of the pre-Clovis hypothesis and its corollary, the coastal migration route. Although numerous additional pre-Clovis sites have been reported in South America, debate continues about the timing of the earliest human migration. Perhaps because of the paucity of very early sites in North America, researchers there are increasingly focused on the genomic evidence.

2017-06-17T16:46:01+00:00 June 17th, 2017|

Earliest Human Presence in North America Dated to the Last Glacial Maximum: New Radiocarbon Dates from Bluefish Caves, Canada

Here, we report new AMS radiocarbon dates obtained on cut-marked bone samples identified during a comprehensive taphonomic analysis of the Bluefish Caves fauna. Our results demonstrate that humans occupied the site as early as 24,000 cal BP (19,650 ± 130 14C BP).

2018-02-17T04:26:24+00:00 May 5th, 2017|

Ancestry dynamics in a South American population: The impact of gene flow and preferential mating

In a population from Antioquia, Colombia with an estimated 79% European autosomal ancestry and an estimated 69% European X-chromosome ancestry, about 15% male gene flow from Europe or about 20% mating or reproductive advantage of Europeans over Amerindians...

2017-04-13T12:01:46+00:00 April 13th, 2017|