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Bayesian inferences suggest that Amazon Yunga Natives diverged from Andeans less than 5000 ybp: Implications for South American prehistory

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dc.contributor.author Scliar, M.O.
dc.contributor.author Gouveia, M.H.
dc.contributor.author Benazzo, A.
dc.contributor.author Ghirotto, S.
dc.contributor.author Fagundes, N.J.
dc.contributor.author Leal, T.P.
dc.contributor.author Magalhães, W.C.
dc.contributor.author Pereira, L.
dc.contributor.author Rodrigues, M.R.
dc.contributor.author Soares-Souza, G.B.
dc.contributor.author Cabrera, L.
dc.contributor.author Berg, D.E.
dc.contributor.author Gilman, R.H.
dc.contributor.author Bertorelle, G.
dc.contributor.author Tarazona-Santos, E.
dc.date.accessioned 2020-06-10T18:11:37Z
dc.date.available 2020-06-10T18:11:37Z
dc.date.issued 2014
dc.identifier.uri https://hdl.handle.net/20.500.12866/8037
dc.description.abstract Background: Archaeology reports millenary cultural contacts between Peruvian Coast-Andes and the Amazon Yunga, a rainforest transitional region between Andes and Lower Amazonia. To clarify the relationships between cultural and biological evolution of these populations, in particular between Amazon Yungas and Andeans, we used DNA-sequence data, a model-based Bayesian approach and several statistical validations to infer a set of demographic parameters. Results: We found that the genetic diversity of the Shimaa (an Amazon Yunga population) is a subset of that of Quechuas from Central-Andes. Using the Isolation-with-Migration population genetics model, we inferred that the Shimaa ancestors were a small subgroup that split less than 5300 years ago (after the development of complex societies) from an ancestral Andean population. After the split, the most plausible scenario compatible with our results is that the ancestors of Shimaas moved toward the Peruvian Amazon Yunga and incorporated the culture and language of some of their neighbors, but not a substantial amount of their genes. We validated our results using Approximate Bayesian Computations, posterior predictive tests and the analysis of pseudo-observed datasets. Conclusions: We presented a case study in which model-based Bayesian approaches, combined with necessary statistical validations, shed light into the prehistoric demographic relationship between Andeans and a population from the Amazon Yunga. Our results offer a testable model for the peopling of this large transitional environmental region between the Andes and the Lower Amazonia. However, studies on larger samples and involving more populations of these regions are necessary to confirm if the predominant Andean biological origin of the Shimaas is the rule, and not the exception. en_US
dc.language.iso eng
dc.publisher BioMed Central
dc.relation.ispartof urn:issn:1471-2148
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Peru en_US
dc.subject Humans en_US
dc.subject Genetic Variation en_US
dc.subject Genetics, Population en_US
dc.subject South America en_US
dc.subject Andes en_US
dc.subject human en_US
dc.subject genetic variation en_US
dc.subject Bayes theorem en_US
dc.subject migration en_US
dc.subject evolution en_US
dc.subject genetics en_US
dc.subject Indians, South American en_US
dc.subject Bayes Theorem en_US
dc.subject Population Groups en_US
dc.subject Molecular Sequence Data en_US
dc.subject Biological Evolution en_US
dc.subject American Indian en_US
dc.subject Amazonia en_US
dc.subject population genetics en_US
dc.subject molecular genetics en_US
dc.subject population group en_US
dc.subject Human Migration en_US
dc.subject Bayesian analysis en_US
dc.subject human evolution en_US
dc.subject Human evolution en_US
dc.subject Native American en_US
dc.subject Population genetics inferences en_US
dc.subject prehistoric en_US
dc.subject rainforest en_US
dc.title Bayesian inferences suggest that Amazon Yunga Natives diverged from Andeans less than 5000 ybp: Implications for South American prehistory en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1186/s12862-014-0174-3
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.15


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