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Guyon L, Guez J, Toupance B, Heyer E, Chaix R. Patrilineal segmentary systems provide a peaceful explanation for the post-Neolithic Y-chromosome bottleneck. Nat Commun 2024; 15:3243. [PMID: 38658560 PMCID: PMC11043392 DOI: 10.1038/s41467-024-47618-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
Studies have found a pronounced decline in male effective population sizes worldwide around 3000-5000 years ago. This bottleneck was not observed for female effective population sizes, which continued to increase over time. Until now, this remarkable genetic pattern was interpreted as the result of an ancient structuring of human populations into patrilineal groups (gathering closely related males) violently competing with each other. In this scenario, violence is responsible for the repeated extinctions of patrilineal groups, leading to a significant reduction in male effective population size. Here, we propose an alternative hypothesis by modelling a segmentary patrilineal system based on anthropological literature. We show that variance in reproductive success between patrilineal groups, combined with lineal fission (i.e., the splitting of a group into two new groups of patrilineally related individuals), can lead to a substantial reduction in the male effective population size without resorting to the violence hypothesis. Thus, a peaceful explanation involving ancient changes in social structures, linked to global changes in subsistence systems, may be sufficient to explain the reported decline in Y-chromosome diversity.
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Affiliation(s)
- Léa Guyon
- Eco-Anthropologie (UMR 7206), Muséum National d'Histoire Naturelle, CNRS, Université Paris Cité, Paris, 75116, France.
| | - Jérémy Guez
- Eco-Anthropologie (UMR 7206), Muséum National d'Histoire Naturelle, CNRS, Université Paris Cité, Paris, 75116, France
- Université Paris-Saclay, CNRS, INRIA, Laboratoire Interdisciplinaire des Sciences du Numérique, Orsay, 91400, France
| | - Bruno Toupance
- Eco-Anthropologie (UMR 7206), Muséum National d'Histoire Naturelle, CNRS, Université Paris Cité, Paris, 75116, France
- Université Paris Cité, Eco-anthropologie, Paris, F-75006, France
| | - Evelyne Heyer
- Eco-Anthropologie (UMR 7206), Muséum National d'Histoire Naturelle, CNRS, Université Paris Cité, Paris, 75116, France
| | - Raphaëlle Chaix
- Eco-Anthropologie (UMR 7206), Muséum National d'Histoire Naturelle, CNRS, Université Paris Cité, Paris, 75116, France.
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2
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Hajiesmaeil M, Ravasini F, Risi F, Magnarini G, Olivieri A, D'Atanasio E, Galehdari H, Trombetta B, Cruciani F. High incidence of AZF duplications in clan-structured Iranian populations detected through Y chromosome sequencing read depth analysis. Sci Rep 2023; 13:11857. [PMID: 37481605 PMCID: PMC10363161 DOI: 10.1038/s41598-023-39069-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023] Open
Abstract
The ampliconic region of the human Y chromosome consists of large duplicated sequences that can undergo non-allelic homologous recombination (NAHR), resulting in structural rearrangements that may cause infertility, especially when they occur in the azoospermia factor b/c (AZFb/c) region. Although AZF duplications have long been neglected due to the technical limitations of STS-based studies that focused mainly on deletions, recent next generation sequencing (NGS) technologies provided evidence for their importance in fertility. In this study, a NGS read depth approach was used to detect AZFb/c rearrangements in 87 Iranians from different ethnic groups. The duplication frequency in Iran proved to be twice as high as in the "1000 Genomes" dataset. Interestingly, most duplications were found in patrilineal ethnic groups, possibly as a consequence of their lower male effective population size which can counteract negative selection. Moreover, we found a large 8.0 Mb duplication, resulting in a fourfold increase in the copy number of AZFc genes, which to our knowledge is the largest duplication ever reported in this region. Overall, our results suggest that it is important to consider not only AZF deletions but also duplications to investigate the causes of male infertility, especially in patrilineal clan-based populations.
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Affiliation(s)
- Mogge Hajiesmaeil
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Francesco Ravasini
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Flavia Risi
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Giorgia Magnarini
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Anna Olivieri
- Department of Biology and Biotechnology 'Lazzaro Spallanzani', Pavia University, Pavia, Italy
- NBFC, National Biodiversity Future Center, 90133, Palermo, Italy
| | - Eugenia D'Atanasio
- Institute of Molecular Biology and Pathology (IBPM), CNR, 00185, Rome, Italy
| | - Hamid Galehdari
- Department of Biology, Faculty of Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Beniamino Trombetta
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Fulvio Cruciani
- Department of Biology and Biotechnologies 'Charles Darwin', Sapienza University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy.
- Institute of Molecular Biology and Pathology (IBPM), CNR, 00185, Rome, Italy.
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3
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Dai SS, Sulaiman X, Isakova J, Xu WF, Abdulloevich NT, Afanasevna ME, Ibrohimovich KB, Chen X, Yang WK, Wang MS, Shen QK, Yang XY, Yao YG, Aldashev AA, Saidov A, Chen W, Cheng LF, Peng MS, Zhang YP. The genetic echo of the Tarim mummies in modern Central Asians. Mol Biol Evol 2022; 39:6675590. [PMID: 36006373 PMCID: PMC9469894 DOI: 10.1093/molbev/msac179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The diversity of Central Asians has been shaped by multiple migrations and cultural diffusion. Although ancient DNA studies have revealed the demographic changes of the Central Asian since the Bronze Age, the contribution of the ancient populations to the modern Central Asian remains opaque. Herein, we performed high-coverage sequencing of 131 whole genomes of Indo-European-speaking Tajik and Turkic-speaking Kyrgyz populations to explore their genomic diversity and admixture history. By integrating the ancient DNA data, we revealed more details of the origins and admixture history of Central Asians. We found that the major ancestry of present-day Tajik populations can be traced back to the admixture of the Bronze Age Bactria–Margiana Archaeological Complex and Andronovo-related populations. Highland Tajik populations further received additional gene flow from the Tarim mummies, an isolated ancient North Eurasian–related population. The West Eurasian ancestry of Kyrgyz is mainly derived from Historical Era populations in Xinjiang of China. Furthermore, the recent admixture signals detected in both Tajik and Kyrgyz are ascribed to the expansions of Eastern Steppe nomadic pastoralists during the Historical Era.
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Affiliation(s)
- Shan Shan Dai
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China
| | - Xierzhatijiang Sulaiman
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Department of Pharmacology, School of Pharmacy, Xinjiang Medical University, Urumqi 830054, China
| | - Jainagul Isakova
- Institute of Molecular Biology and Medicine, Bishkek 720040, Kyrgyzstan
| | - Wei Fang Xu
- Shenzhen Hospital of Guangzhou University of Chinese Medicine, Shenzhen 518034, China
| | - Najmudinov Tojiddin Abdulloevich
- E.N. Pavlovsky Institute of Zoology and Parasitology, Academy of Sciences of Republic of Tajikistan, Dushanbe 734025, Tajikistan
| | - Manilova Elena Afanasevna
- E.N. Pavlovsky Institute of Zoology and Parasitology, Academy of Sciences of Republic of Tajikistan, Dushanbe 734025, Tajikistan
| | - Khudoidodov Behruz Ibrohimovich
- E.N. Pavlovsky Institute of Zoology and Parasitology, Academy of Sciences of Republic of Tajikistan, Dushanbe 734025, Tajikistan
| | - Xi Chen
- Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi 830011, China.,State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Wei Kang Yang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Ming Shan Wang
- Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA 95064, USA
| | - Quan Kuan Shen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China
| | - Xing Yan Yang
- Key Laboratory of Chemistry in Ethnic Medicinal Resource, Yunnan Minzu University, Kunming 650504, China.,School of Chemistry and Environment, Yunnan Minzu University, Kunming 650504, China
| | - Yong Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,KIZ/CUHK Joint Laboratory of Bio-resources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China
| | - Almaz A Aldashev
- Institute of Molecular Biology and Medicine, Bishkek 720040, Kyrgyzstan
| | - Abdusattor Saidov
- E.N. Pavlovsky Institute of Zoology and Parasitology, Academy of Sciences of Republic of Tajikistan, Dushanbe 734025, Tajikistan
| | - Wei Chen
- College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650224, China.,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650224, China
| | - Lu Feng Cheng
- Department of Pharmacology, School of Pharmacy, Xinjiang Medical University, Urumqi 830054, China
| | - Min Sheng Peng
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,KIZ/CUHK Joint Laboratory of Bio-resources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China
| | - Ya Ping Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,KIZ/CUHK Joint Laboratory of Bio-resources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming 650204, China.,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming 650091, China
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4
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Guarino-Vignon P, Marchi N, Chimènes A, Monnereau A, Kroll S, Mashkour M, Lhuillier J, Bendezu-Sarmiento J, Heyer E, Bon C. Genetic analysis of a bronze age individual from Ulug-depe (Turkmenistan). Front Genet 2022; 13:884612. [PMID: 36072661 PMCID: PMC9441711 DOI: 10.3389/fgene.2022.884612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 07/14/2022] [Indexed: 11/13/2022] Open
Abstract
The Oxus Civilisation (or Bactrio-Margian Archaeological Complex, BMAC) was the main archaeological culture of the Bronze Age in southern Central Asia. Paleogenetic analyses were previously conducted mainly on samples from the eastern part of BMAC. The population associated with BMAC descends from local Chalcolithic populations, with some outliers of steppe or South-Asian descent. Here, we present new genome-wide data for one individual from Ulug-depe (Turkmenistan), one of the main BMAC sites, located at the southwestern edge of the BMAC. We demonstrate that this individual genetically belongs to the BMAC cluster. Using this genome, we confirm that modern Indo-Iranian–speaking populations from Central Asia derive their ancestry from BMAC populations, with additional gene flow from the western and the Altai steppes in higher proportions among the Tajiks than the Yagnobi ethnic group.
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Affiliation(s)
- Perle Guarino-Vignon
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
- CAGT, UMR 5288, CNRS, Université Paul Sabatier Toulouse III, Toulouse, France
- *Correspondence: Perle Guarino-Vignon, ; Céline Bon,
| | - Nina Marchi
- CMPG, Institute of Ecology and Evolution, University of Berne, Berne, Switzerland
| | - Amélie Chimènes
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
| | - Aurore Monnereau
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
- BioArCh, Department of Archaeology, University of York, York, United Kingdom
| | - Sonja Kroll
- Archéozoologie, Archéobotanique Sociétés, Pratiques et Environnements (AASPE), Muséum National D'Histoire Naturelle, CNRS, Paris, France
| | - Marjan Mashkour
- Archéozoologie, Archéobotanique Sociétés, Pratiques et Environnements (AASPE), Muséum National D'Histoire Naturelle, CNRS, Paris, France
| | - Johanna Lhuillier
- Archéorient, Environnements et Sociétés de L'Orient Ancien, CNRS/Université Lyon 2, Lyon, France
| | - Julio Bendezu-Sarmiento
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
| | - Evelyne Heyer
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
| | - Céline Bon
- Eco-Anthropologie (EA), Muséum National D'Histoire Naturelle, CNRS, Université de Paris, Paris, France
- *Correspondence: Perle Guarino-Vignon, ; Céline Bon,
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5
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Oill AMT, Handley C, Howell EK, Stone AC, Mathew S, Wilson MA. Genomic analysis reveals geography rather than culture as the predominant factor shaping genetic variation in northern Kenyan human populations. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2022; 178:488-503. [PMID: 36790743 PMCID: PMC9949739 DOI: 10.1002/ajpa.24521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 02/04/2022] [Accepted: 02/21/2022] [Indexed: 11/08/2022]
Abstract
OBJECTIVES The aim of this study was to characterize the genetic relationships within and among four neighboring ethnolinguistic groups in northern Kenya in light of cultural relationships to understand the extent to which geography and culture shape patterns of genetic variation. MATERIALS AND METHODS We collected DNA and demographic information pertaining to aspects of social identity and heritage from 572 individuals across the Turkana, Samburu, Waso Borana, and Rendille of northern Kenya. We sampled individuals across a total of nine clans from these four groups and, additionally, three territorial sections within the Turkana and successfully genotyped 376 individuals. RESULTS Here we report that geography predominately shapes genetic variation within and among human groups in northern Kenya. We observed a clinal pattern of genetic variation that mirrors the overall geographic distribution of the individuals we sampled. We also found relatively higher rates of intermarriage between the Rendille and Samburu and evidence of gene flow between them that reflect these higher rates of intermarriage. Among the Turkana, we observed strong recent genetic substructuring based on territorial section affiliation. Within ethnolinguistic groups, we found that Y chromosome haplotypes do not consistently cluster by natal clan affiliation. Finally, we found that sampled populations that are geographically closer have lower genetic differentiation, and that cultural similarity does not predict genetic similarity as a whole across these northern Kenyan populations. DISCUSSION Overall, the results from this study highlight the importance of geography, even on a local geographic scale, in shaping observed patterns of genetic variation in human populations.
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Affiliation(s)
- Angela M. Taravella Oill
- School of Life Sciences, Arizona State University, Tempe, AZ 85287 USA,Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287 USA
| | - Carla Handley
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287 USA
| | - Emma K. Howell
- School of Life Sciences, Arizona State University, Tempe, AZ 85287 USA,Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287 USA
| | - Anne C. Stone
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287 USA,School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287 USA,Institute of Human Origins, Arizona State University, Tempe, AZ 85287, USA
| | - Sarah Mathew
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287 USA,Institute of Human Origins, Arizona State University, Tempe, AZ 85287, USA,Co-corresponding authors
| | - Melissa A. Wilson
- School of Life Sciences, Arizona State University, Tempe, AZ 85287 USA,Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287 USA,Co-corresponding authors
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6
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Sarno S, Boscolo Agostini R, De Fanti S, Ferri G, Ghirotto S, Modenini G, Pettener D, Boattini A. Y-chromosome variability and genetic history of Commons from Northern Italy. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2021; 175:665-679. [PMID: 33969895 PMCID: PMC8360088 DOI: 10.1002/ajpa.24302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/19/2021] [Accepted: 04/17/2021] [Indexed: 12/31/2022]
Abstract
Objectives Genetic drift and admixture are driving forces in human evolution, but their concerted impact to population evolution in historical times and at a micro‐geographic scale is poorly assessed. In this study we test a demographic model encompassing both admixture and drift to the case of social‐cultural isolates such as the so‐called “Commons.” Materials and methods Commons are peculiar institutions of medieval origins whose key feature is the tight relationship between population and territory, mediated by the collective property of shared resources. Here, we analyze the Y‐chromosomal genetic structure of four Commons (for a total of 366 samples) from the Central and Eastern Padana plain in Northern Italy. Results Our results reveal that all these groups exhibit patterns of significant diversity reduction, peripheral/outlier position within the Italian/European genetic space and high frequency of Common‐specific haplogroups. By explicitly testing different drift‐admixture models, we show that a drift‐only model is more probable for Central Padana Commons, while additional admixture (~20%) from external population around the same time of their foundation cannot be excluded for the Eastern ones. Discussion Building on these results, we suggest central Middle Ages as the most probable age of foundation for three of the considered Commons, the remaining one pointing to late antiquity. We conclude that an admixture‐drift model is particularly useful for interpreting the genetic structure and recent demographic history of small‐scale populations in which social‐cultural features play a significant role.
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Affiliation(s)
- Stefania Sarno
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | | | - Sara De Fanti
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy.,Interdepartmental Centre Alma Mater Research Institute on Global Challenges and Climate Change, University of Bologna, Bologna, Italy
| | - Gianmarco Ferri
- Department of Diagnostic and Clinical Medicine and Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Ghirotto
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Giorgia Modenini
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Davide Pettener
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Alessio Boattini
- Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy
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7
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Lepers C, Billiard S, Porte M, Méléard S, Tran VC. Inference with selection, varying population size, and evolving population structure: application of ABC to a forward-backward coalescent process with interactions. Heredity (Edinb) 2021; 126:335-350. [PMID: 33128035 PMCID: PMC8027416 DOI: 10.1038/s41437-020-00381-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 10/15/2020] [Indexed: 11/08/2022] Open
Abstract
Genetic data are often used to infer demographic history and changes or detect genes under selection. Inferential methods are commonly based on models making various strong assumptions: demography and population structures are supposed a priori known, the evolution of the genetic composition of a population does not affect demography nor population structure, and there is no selection nor interaction between and within genetic strains. In this paper, we present a stochastic birth-death model with competitive interactions and asexual reproduction. We develop an inferential procedure for ecological, demographic, and genetic parameters. We first show how genetic diversity and genealogies are related to birth and death rates, and to how individuals compete within and between strains. This leads us to propose an original model of phylogenies, with trait structure and interactions, that allows multiple merging. Second, we develop an Approximate Bayesian Computation framework to use our model for analyzing genetic data. We apply our procedure to simulated data from a toy model, and to real data by analyzing the genetic diversity of microsatellites on Y-chromosomes sampled from Central Asia human populations in order to test whether different social organizations show significantly different fertilities.
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Affiliation(s)
| | - Sylvain Billiard
- Univ. Lille, CNRS, UMR 819 8 -Evo-Eco-Paleo, F-59000, Lille, France.
| | - Matthieu Porte
- IGN, Institut National de l'Information Géographique et Forestière, F-94165, Saint-Mandé, France.
| | - Sylvie Méléard
- CMAP, CNRS, Ecole Polytechnique, Institut polytechnique de Paris, route de Saclay, 91128, Palaiseau Cedex, France.
| | - Viet Chi Tran
- LAMA, Univ Gustave Eiffel, Univ Paris Est Creteil, CNRS, F-77454, Marne-la-Vallée, France.
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8
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The genetic legacy of legendary and historical Siberian chieftains. Commun Biol 2020; 3:581. [PMID: 33067556 PMCID: PMC7567834 DOI: 10.1038/s42003-020-01307-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 09/15/2020] [Indexed: 02/02/2023] Open
Abstract
Seventeen years of archaeological and anthropological expeditions in North-Eastern Siberia (in the Sakha Republic, Yakutia) have permitted the genetic analysis of 150 ancient (15th-19th century) and 510 modern individuals. Almost all males were successfully analysed (Y-STR) and this allowed us to identify paternal lineages and their geographical expansion through time. This genetic data was confronted with mythological, historical and material evidence to establish the sequence of events that built the modern Yakut genetic diversity. We show that the ancient Yakuts recovered from this large collection of graves are not representative of an ancient population. Uncommonly, we were also able to demonstrate that the funerary preference observed here involved three specific male lineages, especially in the 18th century. Moreover, this dominance was likely caused by the Russian conquest of Siberia which allowed some male clans to rise to new levels of power. Finally, we give indications that some mythical and historical figures might have been the actors of those genetic changes. These results help us reconsider the genetic dynamics of colonization in some regions, question the distinction between fact and myth in national histories and provide a rare insight into a funerary ensemble by revealing the biased process of its composition.
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9
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Kutanan W, Kampuansai J, Srikummool M, Brunelli A, Ghirotto S, Arias L, Macholdt E, Hübner A, Schröder R, Stoneking M. Contrasting Paternal and Maternal Genetic Histories of Thai and Lao Populations. Mol Biol Evol 2020; 36:1490-1506. [PMID: 30980085 PMCID: PMC6573475 DOI: 10.1093/molbev/msz083] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The human demographic history of Mainland Southeast Asia (MSEA) has not been well studied; in particular, there have been very few sequence-based studies of variation in the male-specific portions of the Y chromosome (MSY). Here, we report new MSY sequences of ∼2.3 mB from 914 males and combine these with previous data for a total of 928 MSY sequences belonging to 59 populations from Thailand and Laos who speak languages belonging to three major Mainland Southeast Asia families: Austroasiatic, Tai-Kadai, and Sino-Tibetan. Among the 92 MSY haplogroups, two main MSY lineages (O1b1a1a* [O-M95*] and O2a* [O-M324*]) contribute substantially to the paternal genetic makeup of Thailand and Laos. We also analyze complete mitochondrial DNA genome sequences published previously from the same groups and find contrasting pattern of male and female genetic variation and demographic expansions, especially for the hill tribes, Mon, and some major Thai groups. In particular, we detect an effect of postmarital residence pattern on genetic diversity in patrilocal versus matrilocal groups. Additionally, both male and female demographic expansions were observed during the early Mesolithic (∼10 ka), with two later major male-specific expansions during the Neolithic period (∼4–5 ka) and the Bronze/Iron Age (∼2.0–2.5 ka). These two later expansions are characteristic of the modern Austroasiatic and Tai-Kadai groups, respectively, consistent with recent ancient DNA studies. We simulate MSY data based on three demographic models (continuous migration, demic diffusion, and cultural diffusion) of major Thai groups and find different results from mitochondrial DNA simulations, supporting contrasting male and female genetic histories.
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Affiliation(s)
- Wibhu Kutanan
- Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand.,Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Jatupol Kampuansai
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Bioresources for Agriculture, Industry and Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Metawee Srikummool
- Department of Biochemistry, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Andrea Brunelli
- Department of Life Science and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Silvia Ghirotto
- Department of Life Science and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Leonardo Arias
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Enrico Macholdt
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Alexander Hübner
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Roland Schröder
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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10
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Li M, Zhou W, Zhang Y, Huang L, Wang X, Wu J, Meng M, Wang H, Li C, Bian Y. Development and validation of a novel 29-plex Y-STR typing system for forensic application. Forensic Sci Int Genet 2020; 44:102169. [DOI: 10.1016/j.fsigen.2019.102169] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 09/24/2019] [Accepted: 09/29/2019] [Indexed: 11/29/2022]
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11
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Tackney J, Jensen AM, Kisielinski C, O'Rourke DH. Molecular analysis of an ancient Thule population at Nuvuk, Point Barrow, Alaska. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 168:303-317. [PMID: 30628076 DOI: 10.1002/ajpa.23746] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 10/05/2018] [Accepted: 10/16/2018] [Indexed: 11/09/2022]
Abstract
OBJECTIVES The North American archaeological record supports a Holocene origin of Arctic Indigenous peoples. Although the Paleo-Inuit were present for millennia, archaeological and genetic studies suggest that modern peoples descend from a second, more recent tradition known as the Neo-Inuit. Origins of the Neo-Inuit and their relations to the earlier and later Indigenous peoples are an area of active study. Here, we genetically analyze the maternal lineages present at Nuvuk, once the northernmost community in Alaska and located in a region identified as a possible origin point of the Neo-Inuit Thule. The cemetery at Nuvuk contains human remains representing a nearly one thousand year uninterrupted occupation from early Thule to post-contact Iñupiat. MATERIALS AND METHODS We selected 44 individuals from Nuvuk with calibrated dates between 981 AD and 1885 AD for molecular analysis. We amplified and sequenced the hypervariable segment I of the mitogenome. We compared the Nuvuk data with previously published sequences from 68 modern and ancient communities from across Asia and North America. Phylogeographic analyses suggest possible scenarios of Holocene Arctic and sub-Arctic population movements. RESULTS We successfully retrieved sequence data from 39 individuals. Haplogroup frequencies in Nuvuk were typed as 66.7% A2b1, 25.6% A2a, and 7.7% D4b1a2a1a. These results suggest that the population at Nuvuk was closest to the ancient Thule and modern Inuit of Canada, and to the Siberian Naukan people. We confirm that haplogroups A2a, A2b1, D2a, and D4b1a2a1a appear at high frequency in Arctic and sub-Arctic populations of North America and Chukotka. Sister clades D2b and D4b1a2a1b are present in Asian and Eastern European populations. DISCUSSION The ancient mitochondrial sequences from Nuvuk confirm the link between the North Slope and the Thule who later spread east, and the maternal discontinuity between the Neo-Inuit and Paleo-Inuit. We suggest haplogroups A2a, A2b, and D4b1a2a1a are linked to the ancestors of the Thule in eastern Beringia, whereas the D2 and D4b1a2a1 clades appear to have Asian Holocene origins. Further Siberian and Alaskan genomes are necessary to clarify these population migrations beyond a simple two-wave scenario of Neo-Inuit and Paleo-Inuit.
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Affiliation(s)
- Justin Tackney
- Department of Anthropology, University of Kansas, Lawrence, Kansas
| | - Anne M Jensen
- UIC Science LLC, Barrow, Alaska.,Department of Anthropology, University of Alaska Fairbanks, Fairbanks, Alaska
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12
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Chung NN, Jacobs GS, Sudoyo H, Malik SG, Chew LY, Lansing JS, Cox MP. Sex-linked genetic diversity originates from persistent sociocultural processes at microgeographic scales. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190733. [PMID: 31598251 PMCID: PMC6731738 DOI: 10.1098/rsos.190733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
Population genetics has been successful at identifying the relationships between human groups and their interconnected histories. However, the link between genetic demography inferred at large scales and the individual human behaviours that ultimately generate that demography is not always clear. While anthropological and historical context are routinely presented as adjuncts in population genetic studies to help describe the past, determining how underlying patterns of human sociocultural behaviour impact genetics still remains challenging. Here, we analyse patterns of genetic variation in village-scale samples from two islands in eastern Indonesia, patrilocal Sumba and a matrilocal region of Timor. Adopting a 'process modelling' approach, we iteratively explore combinations of structurally different models as a thinking tool. We find interconnected socio-genetic interactions involving sex-biased migration, lineage-focused founder effects, and on Sumba, heritable social dominance. Strikingly, founder ideology, a cultural model derived from anthropological and archaeological studies at larger regional scales, has both its origins and impact at the scale of villages. Process modelling lets us explore these complex interactions, first by circumventing the complexity of formal inference when studying large datasets with many interacting parts, and then by explicitly testing complex anthropological hypotheses about sociocultural behaviour from a more familiar population genetic standpoint.
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Affiliation(s)
- Ning Ning Chung
- Complexity Institute, Nanyang Technological University, Singapore
- Centre for University Core, Singapore University of Social Sciences, Singapore
| | - Guy S. Jacobs
- Complexity Institute, Nanyang Technological University, Singapore
| | - Herawati Sudoyo
- Genome Diversity and Diseases Laboratory, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
- Department of Medical Biology, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
- Sydney Medical School, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Safarina G. Malik
- Genome Diversity and Diseases Laboratory, Eijkman Institute for Molecular Biology, Jakarta, Indonesia
| | - Lock Yue Chew
- Complexity Institute, Nanyang Technological University, Singapore
- School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
| | - J. Stephen Lansing
- Santa Fe Institute, Santa Fe, NM 87501, USA
- Stockholm Resilience Center, Kräftriket, 10405 Stockholm, Sweden
| | - Murray P. Cox
- Statistics and Bioinformatics Group, School of Fundamental Sciences, Massey University, Palmerston North 4410, New Zealand
- Te Pūnaha Matatini, Centre of Research Excellence for Complex Systems, Aukland, New Zealand
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13
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Ly G, Laurent R, Lafosse S, Monidarin C, Diffloth G, Bourdier F, Evrard O, Toupance B, Pavard S, Chaix R. From matrimonial practices to genetic diversity in Southeast Asian populations: the signature of the matrilineal puzzle. Philos Trans R Soc Lond B Biol Sci 2019; 374:20180434. [PMID: 31303171 DOI: 10.1098/rstb.2018.0434] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
In matrilineal populations, the descent group affiliation is transmitted by women whereas the socio-political power frequently remains in the hands of men. This situation, named the 'matrilineal puzzle', is expected to promote local endogamy as a coping mechanism allowing men to maintain their decision-making power over their natal descent group. In this paper, we revisit this 'matrilineal puzzle' from a population genetics' point of view. Indeed, such tendency for local endogamy in matrilineal populations is expected to increase their genetic inbreeding and generate isolation-by-distance patterns between villages. To test this hypothesis, we collected ethno-demographic data for 3261 couples and high-density genetic data for 675 individuals from 11 Southeast Asian populations with a wide range of social organizations: matrilineal and matrilocal populations (M), patrilineal and patrilocal populations (P) or cognatic populations with predominant matrilocal residence (C). We observed that M and C populations have higher levels of village endogamy than P populations, and that such higher village endogamy leads to higher genetic inbreeding. M populations also exhibit isolation-by-distance patterns between villages. We interpret such genetic patterns as the signature of the 'matrilineal puzzle'. Notably, our results suggest that any form of matrilocal marriage (whatever the descent rule is) increases village endogamy. These findings suggest that male dominance, when combined with matrilocality, constrains inter-village migrations, and constitutes an underexplored cultural process shaping genetic patterns in human populations. This article is part of the theme issue 'The evolution of female-biased kinship in humans and other mammals'.
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Affiliation(s)
- Goki Ly
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
| | - Romain Laurent
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
| | - Sophie Lafosse
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
| | - Chou Monidarin
- 2 Rodolphe Merieux Laboratory and Faculty of Pharmacy of University of Health Sciences , Phnom Penh , Cambodia
| | | | - Frédéric Bourdier
- 4 Unité 201 Développement et Sociétés (DEVSOC), IEDES/IRD, Panthéon Sorbonne , Paris , France
| | - Olivier Evrard
- 5 Unité Patrimoines Locaux et Gouvernance (PALOC), Muséum National d'Histoire Naturelle, CNRS, IRD , 75006 Paris , France
| | - Bruno Toupance
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
| | - Samuel Pavard
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
| | - Raphaëlle Chaix
- 1 Unité Eco-anthropologie (EA), Muséum National d'Histoire Naturelle, CNRS, Université de Paris, 17 place du Trocadéro , 75016 Paris , France
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Kleisner K, Pokorný Š, Čížková M, Froment A, Černý V. Nomadic pastoralists and sedentary farmers of the Sahel/Savannah Belt of Africa in the light of geometric morphometrics based on facial portraits. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 169:632-645. [DOI: 10.1002/ajpa.23845] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 04/09/2019] [Accepted: 04/15/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Karel Kleisner
- Department of Philosophy and History of Science, Faculty of ScienceCharles University Prague Czech Republic
| | - Šimon Pokorný
- Department of Philosophy and History of Science, Faculty of ScienceCharles University Prague Czech Republic
| | - Martina Čížková
- Department of Anthropology and Human Genetics, Faculty of ScienceCharles University Prague Czech Republic
- Archaeogenetics LaboratoryInstitute of Archaeology of the Academy of Sciences of the Czech Republic Prague Czech Republic
| | - Alain Froment
- UMR 208‐PalocIRD‐MNHN, Musée de l'Homme Paris France
| | - Viktor Černý
- Department of Anthropology and Human Genetics, Faculty of ScienceCharles University Prague Czech Republic
- Archaeogenetics LaboratoryInstitute of Archaeology of the Academy of Sciences of the Czech Republic Prague Czech Republic
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15
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Genetic kinship and admixture in Iron Age Scytho-Siberians. Hum Genet 2019; 138:411-423. [DOI: 10.1007/s00439-019-02002-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 03/15/2019] [Indexed: 01/08/2023]
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16
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Cilli E, Sarno S, Gnecchi Ruscone GA, Serventi P, De Fanti S, Delaini P, Ognibene P, Basello GP, Ravegnini G, Angelini S, Ferri G, Gentilini D, Di Blasio AM, Pelotti S, Pettener D, Sazzini M, Panaino A, Luiselli D, Gruppioni G. The genetic legacy of the Yaghnobis: A witness of an ancient Eurasian ancestry in the historically reshuffled central Asian gene pool. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 168:717-728. [PMID: 30693949 DOI: 10.1002/ajpa.23789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 12/03/2018] [Accepted: 12/04/2018] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The Yaghnobis are an ethno-linguistic minority historically settled along the Yaghnob River in the Upper-Zarafshan Valley in Tajikistan. They speak a language of Old Sogdian origin, which is the only present-day witness of the Lingua Franca used along the Silk Road in Late Antiquity. The aim of this study was to reconstruct the genetic history of this community in order to shed light on its isolation and genetic ancestry within the Euro-Asiatic context. MATERIALS AND METHODS A total of 100 DNA samples were collected in the Yaghnob and Matcha Valleys during several expeditions and their mitochondrial, Y-chromosome and autosomal genome-wide variation were compared with that from a large set of modern and ancient Euro-Asiatic samples. RESULTS Findings from uniparental markers highlighted the long-term isolation of the Yaghnobis. Mitochondrial DNA ancestry traced an ancient link with Middle Eastern populations, whereas Y-chromosome legacy showed more tight relationships with Central Asians. Admixture, outgroup-f3, and D-statistics computed on autosomal variation corroborated Y-chromosome evidence, pointing respectively to low Anatolian Neolithic and high Steppe ancestry proportions in Yaghnobis, and to their closer affinity with Tajiks than to Iranians. DISCUSSION Although the Yaghnobis do not show evident signs of recent admixture, they could be considered a modern proxy for the source of gene flow for many Central Asian and Middle Eastern groups. Accordingly, they seem to retain a peculiar genomic ancestry probably ascribable to an ancient gene pool originally wide spread across a vast area and subsequently reshuffled by distinct demographic events occurred in Middle East and Central Asia.
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Affiliation(s)
- Elisabetta Cilli
- Laboratories of Physical Anthropology and Ancient DNA, Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Stefania Sarno
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Guido Alberto Gnecchi Ruscone
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Patrizia Serventi
- Laboratories of Physical Anthropology and Ancient DNA, Department of Cultural Heritage, University of Bologna, Ravenna, Italy.,Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Sara De Fanti
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Paolo Delaini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Paolo Ognibene
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Gian Pietro Basello
- Department of Asian, African and Mediterranean Studies, University of Naples "L'Orientale", Naples, Italy
| | - Gloria Ravegnini
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Sabrina Angelini
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Gianmarco Ferri
- Department of Diagnostic and Clinical Medicine and Public Health, University of Modena and Reggio Emilia, Modena, Italy
| | - Davide Gentilini
- Centre for Biomedical Research and Technologies, Italian Auxologic Institute, IRCCS, Milan, Italy
| | - Anna Maria Di Blasio
- Centre for Biomedical Research and Technologies, Italian Auxologic Institute, IRCCS, Milan, Italy
| | - Susi Pelotti
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Davide Pettener
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Marco Sazzini
- Laboratory of Molecular Anthropology and Centre for Genome Biology, Department of Biological Geological and Environmental Sciences, University of Bologna, Bologna, Italy
| | - Antonio Panaino
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Donata Luiselli
- Laboratories of Physical Anthropology and Ancient DNA, Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Giorgio Gruppioni
- Laboratories of Physical Anthropology and Ancient DNA, Department of Cultural Heritage, University of Bologna, Ravenna, Italy
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17
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Oliveira S, Hübner A, Fehn AM, Aço T, Lages F, Pakendorf B, Stoneking M, Rocha J. The role of matrilineality in shaping patterns of Y chromosome and mtDNA sequence variation in southwestern Angola. Eur J Hum Genet 2018; 27:475-483. [PMID: 30467412 DOI: 10.1038/s41431-018-0304-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 10/25/2018] [Accepted: 11/01/2018] [Indexed: 11/09/2022] Open
Abstract
Southwestern Angola is a region characterized by contact between indigenous foragers and incoming food-producers, involving genetic and cultural exchanges between peoples speaking Kx'a, Khoe-Kwadi, and Bantu languages. Although present-day Bantu speakers share a patrilocal residence pattern and matrilineal principle of clan and group membership, a highly stratified social setting divides dominant pastoralists from marginalized groups that subsist on alternative strategies and have previously been thought to have pre-Bantu origins. Here, we compare new high-resolution sequence data from 2.3 Mb of the male-specific region of the Y chromosome (MSY) from 170 individuals with previously reported mitochondrial DNA (mtDNA) genomes, to investigate the population history of seven representative southwestern Angolan groups (Himba, Kuvale, Kwisi, Kwepe, Twa, Tjimba, !Xun), and to study the causes and consequences of sex-biased processes in their genetic variation. We found no clear link between the formerly Kwadi-speaking Kwepe and pre-Bantu eastern African migrants, and no pre-Bantu MSY lineages among Bantu-speaking groups, except for small amounts of "Khoisan" introgression. We therefore propose that irrespective of their subsistence strategies, all Bantu-speaking groups of the area share a male Bantu origin. Additionally, we show that in Bantu-speaking groups, the levels of among-group and between-group variation are higher for mtDNA than for MSY. These results, together with our previous demonstration that the matriclanic systems of southwestern Angolan Bantu groups are genealogically consistent, suggest that matrilineality strongly enhances both female population sizes and interpopulation mtDNA variation.
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Affiliation(s)
- Sandra Oliveira
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, 4485-661, Vairão, Portugal. .,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4169-007, Porto, Portugal.
| | - Alexander Hübner
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, 04103, Leipzig, Germany
| | - Anne-Maria Fehn
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, 4485-661, Vairão, Portugal.,Department of Linguistic and Cultural Evolution, Max Planck Institute for the Science of Human History, 00745, Jena, Germany.,Institute for African Studies, Goethe University, 60323, Frankfurt, Germany
| | - Teresa Aço
- Centro de Estudos do Deserto (CEDO), Namibe, Angola
| | - Fernanda Lages
- ISCED/Huíla-Instituto Superior de Ciências da Educação, Lubango, Angola
| | - Brigitte Pakendorf
- Laboratoire Dynamique du Langage, UMR5596, CNRS & Univ Lyon, 69007, Lyon, France
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, 04103, Leipzig, Germany
| | - Jorge Rocha
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, 4485-661, Vairão, Portugal.,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4169-007, Porto, Portugal.,ISCED/Huíla-Instituto Superior de Ciências da Educação, Lubango, Angola
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18
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Arias L, Schröder R, Hübner A, Barreto G, Stoneking M, Pakendorf B. Cultural Innovations Influence Patterns of Genetic Diversity in Northwestern Amazonia. Mol Biol Evol 2018; 35:2719-2735. [PMID: 30169717 PMCID: PMC6231495 DOI: 10.1093/molbev/msy169] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Human populations often exhibit contrasting patterns of genetic diversity in the mtDNA and the nonrecombining portion of the Y-chromosome (NRY), which reflect sex-specific cultural behaviors and population histories. Here, we sequenced 2.3 Mb of the NRY from 284 individuals representing more than 30 Native American groups from Northwestern Amazonia (NWA) and compared these data to previously generated mtDNA genomes from the same groups, to investigate the impact of cultural practices on genetic diversity and gain new insights about NWA population history. Relevant cultural practices in NWA include postmarital residential rules and linguistic exogamy, a marital practice in which men are required to marry women speaking a different language. We identified 2,969 SNPs in the NRY sequences, only 925 of which were previously described. The NRY and mtDNA data showed different sex-specific demographic histories: female effective population size has been larger than that of males through time, which might reflect larger variance in male reproductive success. Both markers show an increase in lineage diversification beginning ∼5,000 years ago, which may reflect the intensification of agriculture, technological innovations, and the expansion of regional trade networks documented in the archaeological evidence. Furthermore, we find similar excesses of NRY versus mtDNA between-population divergence at both the local and continental scale, suggesting long-term stability of female versus male migration. We also find evidence of the impact of sociocultural practices on diversity patterns. Finally, our study highlights the importance of analyzing high-resolution mtDNA and NRY sequences to reconstruct demographic history, since this can differ considerably between sexes.
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Affiliation(s)
- Leonardo Arias
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Laboratorio de Genética Molecular Humana, Departamento de Biología, Universidad del Valle, Cali, Colombia
| | - Roland Schröder
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Alexander Hübner
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Guillermo Barreto
- Laboratorio de Genética Molecular Humana, Departamento de Biología, Universidad del Valle, Cali, Colombia
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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Austerlitz F, Heyer E. Neutral Theory: From Complex Population History to Natural Selection and Sociocultural Phenomena in Human Populations. Mol Biol Evol 2018; 35:1304-1307. [PMID: 29659992 DOI: 10.1093/molbev/msy067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Here, we present a synthetic view on how Kimura's Neutral theory has helped us gaining insight on the different evolutionary forces that shape human evolution. We put this perspective in the frame of recent emerging challenges: the use of whole genome data for reconstructing population histories, natural selection on complex polygenic traits, and integrating cultural processes in human evolution.
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Affiliation(s)
- Frédéric Austerlitz
- UMR 7206 Eco-Anthropologie et Ethnobiologie, CNRS, MNHN, Université Paris Diderot, Paris, France
| | - Evelyne Heyer
- UMR 7206 Eco-Anthropologie et Ethnobiologie, CNRS, MNHN, Université Paris Diderot, Paris, France
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20
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Ly G, Alard B, Laurent R, Lafosse S, Toupance B, Monidarin C, Diffloth G, Bourdier F, Evrard O, Pavard S, Chaix R. Residence rule flexibility and descent groups dynamics shape uniparental genetic diversities in South East Asia. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 165:480-491. [PMID: 29359511 DOI: 10.1002/ajpa.23374] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 11/09/2017] [Accepted: 12/04/2017] [Indexed: 11/08/2022]
Abstract
OBJECTIVES Social organization plays a major role in shaping human population genetic diversity. In particular, matrilocal populations tend to exhibit less mitochondrial diversity than patrilocal populations, and the other way around for Y chromosome diversity. However, several studies have not replicated such findings. The objective of this study is to understand the reasons for such inconsistencies and further evaluate the influence of social organization on genetic diversity. MATERIALS AND METHODS We explored uniparental diversity patterns using mitochondrial HV1 sequences and 17 Y-linked short tandem repeats (STRs) in 12 populations (n = 619) from mainland South-East Asia exhibiting a wide range of social organizations, along with quantitative ethno-demographic information sampled at the individual level. RESULTS MtDNA diversity was lower in matrilocal than in multilocal and patrilocal populations while Y chromosome diversity was similar among these social organizations. The reasons for such asymmetry at the genetic level were understood by quantifying sex-specific migration rates from our ethno-demographic data: while female migration rates varied between social organizations, male migration rates did not. This unexpected lack of difference in male migrations resulted from a higher flexibility in residence rule in patrilocal than in matrilocal populations. In addition, our data suggested an impact of clan fission process on uniparental genetic patterns. CONCLUSIONS The observed lack of signature of patrilocality on Y chromosome patterns might be attributed to the higher residence flexibility in the studied patrilocal populations, thus providing a potential explanation for the apparent discrepancies between social and genetic structures. Altogether, this study highlights the need to quantify the actual residence and descent patterns to fit social to genetic structures.
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Affiliation(s)
- Goki Ly
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Bérénice Alard
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Romain Laurent
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Sophie Lafosse
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Bruno Toupance
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Chou Monidarin
- Faculty of Pharmacy and Rodolphe Mérieux Laboratory, University of Health Sciences, Phnom Penh, Cambodia
| | | | - Frédéric Bourdier
- Développement et Sociétés, UMR 201, Panthéon Sorbonne, IEDES, IRD, Paris, France
| | - Olivier Evrard
- Patrimoines Locaux et Gouvernance, UMR 208, IRD, MNHN, Paris, France
| | - Samuel Pavard
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
| | - Raphaëlle Chaix
- Eco-Anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, Paris, F-75016, France
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21
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Šebest L, Baldovič M, Frtús A, Bognár C, Kyselicová K, Kádasi Ľ, Beňuš R. Detection of mitochondrial haplogroups in a small avar-slavic population from the eigth-ninth century AD. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 165:536-553. [PMID: 29345305 DOI: 10.1002/ajpa.23380] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 10/31/2017] [Accepted: 12/09/2017] [Indexed: 11/08/2022]
Abstract
OBJECTIVES In the sixth century AD, Avars came to Central Europe from middle Eurasian steppes and founded a strong Empire called the Avar Khagante (568-799/803 AD) in the Pannonian basin. During the existence of this empire, they undertook many military and pugnacious campaigns. In the seventh century, they conquered the northern territory inhabited by Slavs, who were further recruited in Avar military and were commissioned with obtaining food supplies. During almost 200 years of Avar domination, a significant influence by the Avar culture (especially on the burial rite) and assimilation with indigenous population (occurrence of "East Asian"cranial features) could be noticed in this mixed area, which is supported by achaeological and anthropologcal research. Therefore we expected higher incidence of east Eurasian haplogroups (introduced by Avars) than the frequencies detected in present-day central European populations. MATERIALS AND METHODS Mitochondrial DNA from 62 human skeletal remains excavated from the Avar-Slavic burial site Cífer-Pác (Slovakia) dated to the eighth and ninth century was analyzed by the sequencing of hypervariable region I and selected parts of coding region. Obtained haplotypes were compared with other present-day and historical populations and genetic distances were calculated using standard statistical method. RESULTS AND DISCUSSION In total, the detection of mitochondrial haplogroups was possible in 46 individuals. Our results prooved a higher frequency of east Eurasian haplogroups in our analyzed population (6.52%) than in present-day central European populations. However, it is almost three times lower than the frequency of east Eurasian haplogroups detected in other medieval Avar populations. The statistical analysis showed a greater similarity and the lowest genetic distances between the Avar-Slavic burial site Cifer-Pac and medieval European populations than the South Siberian, East and Central Asian populations. CONCLUSION Our results indicate that the transfer of Avar genetic variation through their mtDNA was rather weak in the analyzed mixed population.
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Affiliation(s)
- Lukáš Šebest
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
| | - Marian Baldovič
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
| | - Adam Frtús
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
| | - Csaba Bognár
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
| | - Klaudia Kyselicová
- Faculty of Medicine, Institute of Physiology, Comenius University, Sasinkova 2, Bratislava 813 72, Slovak Republic.,Department of Anthropology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
| | - Ľudevít Kádasi
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic.,Biomedical Research Center Slovak Academy of Sciences, Slovak Academy of Sciences, Dubravska cesta 9, Bratislava 845 05, Slovak Republic
| | - Radoslav Beňuš
- Department of Anthropology, Faculty of Natural Sciences, Comenius University, Mlynska Dolina, Ilkovicova 6, Bratislava 842 15, Slovak Republic
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Oliveira S, Fehn AM, Aço T, Lages F, Gayà-Vidal M, Pakendorf B, Stoneking M, Rocha J. Matriclans shape populations: Insights from the Angolan Namib Desert into the maternal genetic history of southern Africa. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 165:518-535. [PMID: 29313877 DOI: 10.1002/ajpa.23378] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 11/17/2017] [Accepted: 12/09/2017] [Indexed: 11/10/2022]
Abstract
OBJECTIVES Southern Angola is a poorly studied region, inhabited by populations that have been associated with different migratory movements into southern Africa. Apart from Kx'a-speaking San foragers and Bantu-speaking pastoralists, ethnographic and linguistic studies have suggested the existence of an enigmatic array of pre-Bantu communities, like the Kwepe (formerly Khoe-Kwadi speakers), Twa and Kwisi. Here, we evaluate previous peopling hypotheses by assessing the relationships between different southern Angolan populations, based on newly collected linguistic data and complete mtDNA genomes. MATERIALS AND METHODS We analyzed 295 complete mtDNA genomes and linguistic data from seven groups from the Namib Desert (Himba, Kuvale, Tjimba, Twa, Kwisi, Kwepe) and Kunene Province (!Xun), placing special emphasis on the evaluation of the genealogical consistency of the matriclanic system that characterizes most of these groups. RESULTS We found that the maternal genetic structure of all groups from the Namib Desert was strongly shaped by the consistency of their matriclanic system. The tracking of the maternal heritage enhanced population differentiation by genetic drift and is likely to have caused the divergent mtDNA profiles of the Kwepe, Twa, and Kwisi, who probably formed a single population within the spectrum of Bantu genetic variation. Model-based analyses further suggest that the dominant pastoral groups Kuvale and Himba may be grouped into a Bantu proto-population which also included the ancestors of present-day Tjimba and Herero, as well as the Khoe-Kwadi speaking Damara foragers from Namibia. DISCUSSION The view from southwestern Angola offers a new perspective on the populating history of southern Africa and the Bantu expansions by showing that social stratification and different subsistence patterns are not always indicative of remnant groups, but may reflect Bantu-internal variation and ethnogenesis.
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Affiliation(s)
- Sandra Oliveira
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, Vairão 4485-661, Portugal.,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto 4169-007, Portugal
| | - Anne-Maria Fehn
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, Vairão 4485-661, Portugal.,Department of Linguistic and Cultural Evolution, Max Planck Institute for the Science of Human History, Jena 07745, Germany.,Institute for African Studies, Goethe University, Frankfurt 60323, Germany
| | - Teresa Aço
- Centro de Estudos do Deserto (CEDO), Namibe, Angola
| | - Fernanda Lages
- ISCED/Huíla-Instituto Superior de Ciências da Educação, Lubango, Angola
| | - Magdalena Gayà-Vidal
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, Vairão 4485-661, Portugal
| | - Brigitte Pakendorf
- Laboratoire Dynamique du Langage, UMR5596, CNRS & Université Lyon, Lyon 69007, France
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany
| | - Jorge Rocha
- CIBIO/InBIO: Research Center in Biodiversity and Genetic Resources, Vairão 4485-661, Portugal.,Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto 4169-007, Portugal.,ISCED/Huíla-Instituto Superior de Ciências da Educação, Lubango, Angola
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23
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The Connection of the Genetic, Cultural and Geographic Landscapes of Transoxiana. Sci Rep 2017; 7:3085. [PMID: 28596519 PMCID: PMC5465200 DOI: 10.1038/s41598-017-03176-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 04/26/2017] [Indexed: 11/09/2022] Open
Abstract
We have analyzed Y-chromosomal variation in populations from Transoxiana, a historical region covering the southwestern part of Central Asia. We studied 780 samples from 10 regional populations of Kazakhs, Uzbeks, Turkmens, Dungans, and Karakalpaks using 35 SNP and 17 STR markers. Analysis of haplogroup frequencies using multidimensional scaling and principal component plots, supported by an analysis of molecular variance, showed that the geographic landscape of Transoxiana, despite its distinctiveness and diversity (deserts, fertile river basins, foothills and plains) had no strong influence on the genetic landscape. The main factor structuring the gene pool was the mode of subsistence: settled agriculture or nomadic pastoralism. Investigation of STR-based clusters of haplotypes and their ages revealed that cultural and demic expansions of Transoxiana were not closely connected with each other. The Arab cultural expansion introduced Islam to the region but did not leave a significant mark on the pool of paternal lineages. The Mongol expansion, in contrast, had enormous demic success, but did not impact cultural elements like language and religion. The genealogy of Muslim missionaries within the settled agricultural communities of Transoxiana was based on spiritual succession passed from teacher to disciple. However, among Transoxianan nomads, spiritual and biological succession became merged.
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Marchi N, Hegay T, Mennecier P, Georges M, Laurent R, Whitten M, Endicott P, Aldashev A, Dorzhu C, Nasyrova F, Chichlo B, Ségurel L, Heyer E. Sex-specific genetic diversity is shaped by cultural factors in Inner Asian human populations. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2017; 162:627-640. [PMID: 28158897 DOI: 10.1002/ajpa.23151] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 11/30/2016] [Accepted: 12/02/2016] [Indexed: 01/06/2023]
Abstract
OBJECTIVES Sex-specific genetic structures have been previously documented worldwide in humans, even though causal factors have not always clearly been identified. In this study, we investigated the impact of ethnicity, geography and social organization on the sex-specific genetic structure in Inner Asia. Furthermore, we explored the process of ethnogenesis in multiple ethnic groups. METHODS We sampled DNA in Central and Northern Asia from 39 populations of Indo-Iranian and Turkic-Mongolic native speakers. We focused on genetic data of the Y chromosome and mitochondrial DNA. First, we compared the frequencies of haplogroups to South European and East Asian populations. Then, we investigated the genetic differentiation for eight Y-STRs and the HVS1 region, and tested for the effect of geography and ethnicity on such patterns. Finally, we reconstructed the male demographic history, inferred split times and effective population sizes of different ethnic groups. RESULTS Based on the haplogroup data, we observed that the Indo-Iranian- and Turkic-Mongolic-speaking populations have distinct genetic backgrounds. However, each population showed consistent mtDNA and Y chromosome haplogroups patterns. As expected in patrilocal populations, we found that the Y-STRs were more structured than the HVS1. While ethnicity strongly influenced the genetic diversity on the Y chromosome, geography better explained that of the mtDNA. Furthermore, when looking at various ethnic groups, we systematically found a genetic split time older than historical records, suggesting a cultural rather than biological process of ethnogenesis. CONCLUSIONS This study highlights that, in Inner Asia, specific cultural behaviors, especially patrilineality and patrilocality, leave a detectable signature on the sex-specific genetic structure.
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Affiliation(s)
- Nina Marchi
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Tatyana Hegay
- Uzbek Academy of Sciences, Institute of Immunology, Tashkent, Uzbekistan
| | - Philippe Mennecier
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Myriam Georges
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Romain Laurent
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Mark Whitten
- MPRG on Comparative Population Linguistics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Philipp Endicott
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Almaz Aldashev
- Institute molecular biology and medicine, Bishkek, 720040, Kyrgyzstan
| | | | - Firuza Nasyrova
- Laboratory of Plant Genetics, Institute of Botany, Plant Physiology and Genetics, TAS, Dushanbe, 734063, Tajikistan
| | - Boris Chichlo
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Laure Ségurel
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
| | - Evelyne Heyer
- Eco-anthropologie et Ethnobiologie, UMR 7206 CNRS, MNHN, Univ Paris Diderot, Sorbonne Paris Cité, F-75016, Paris, France
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25
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The Y chromosome as the most popular marker in genetic genealogy benefits interdisciplinary research. Hum Genet 2016; 136:559-573. [DOI: 10.1007/s00439-016-1740-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 10/16/2016] [Indexed: 01/01/2023]
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26
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Saeb ATM, Al-Naqeb D. The Impact of Evolutionary Driving Forces on Human Complex Diseases: A Population Genetics Approach. SCIENTIFICA 2016; 2016:2079704. [PMID: 27313952 PMCID: PMC4904122 DOI: 10.1155/2016/2079704] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/22/2016] [Indexed: 06/06/2023]
Abstract
Investigating the molecular evolution of human genome has paved the way to understand genetic adaptation of humans to the environmental changes and corresponding complex diseases. In this review, we discussed the historical origin of genetic diversity among human populations, the evolutionary driving forces that can affect genetic diversity among populations, and the effects of human movement into new environments and gene flow on population genetic diversity. Furthermore, we presented the role of natural selection on genetic diversity and complex diseases. Then we reviewed the disadvantageous consequences of historical selection events in modern time and their relation to the development of complex diseases. In addition, we discussed the effect of consanguinity on the incidence of complex diseases in human populations. Finally, we presented the latest information about the role of ancient genes acquired from interbreeding with ancient hominids in the development of complex diseases.
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Affiliation(s)
- Amr T. M. Saeb
- Strategic Center for Diabetes Research, College of Medicine, King Saud University, P.O. Box 18397, Riyadh 11415, Saudi Arabia
| | - Dhekra Al-Naqeb
- Strategic Center for Diabetes Research, College of Medicine, King Saud University, P.O. Box 18397, Riyadh 11415, Saudi Arabia
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27
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Eaaswarkhanth M, Pavlidis P, Gokcumen O. Geographic distribution and adaptive significance of genomic structural variants: an anthropological genetics perspective. Hum Biol 2016; 86:260-75. [PMID: 25959693 DOI: 10.13110/humanbiology.86.4.0260] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Anthropological geneticists have successfully used single-nucleotide and short tandem repeat variations across human genomes to reconstruct human history. These markers have also been used extensively to identify adaptive and phenotypic variation. The recent advent of high-throughput genomic technologies revealed an overlooked type of genomic variation: structural variants (SVs). In fact, some SVs may contribute to human adaptation in substantial and previously unexplored ways. SVs include deletions, insertions, duplications, inversions, and translocations of genomic segments that vary among individuals from the same species. SVs are much less numerous than single-nucleotide variants but account for at least seven times more variable base pairs than do single-nucleotide variants when two human genomes are compared. Moreover, recent studies have shown that SVs have higher mutation rates than single-nucleotide variants when the affected base pairs are considered, especially in certain parts of the genome. The null hypothesis for the evolution of SVs, as for single-nucleotide variants, is neutrality. Hence, drift is the primary force that shapes the current allelic distribution of most SVs. However, due to their size, a larger proportion of SVs appear to evolve under nonneutral forces (mostly purifying selection) than do single-nucleotide variants. In fact, as exemplified by several groundbreaking studies, SVs contribute to anthropologically relevant phenotypic variation and local adaptation among humans. In this review, we argue that with the advent of affordable genomic technologies, anthropological scrutiny of genomic structural variation emerges as a fertile area of inquiry to better understand human phenotypic variation. To motivate potential studies, we discuss scenarios through which structural variants (SVs) affect phenotypic variation among humans within an anthropological context. We further provide a methodological workflow in which we analyzed 1000 Genomes deletion variants and identified 16 exonic deletions that are specific to the African continent. We analyzed two of these deletion variants affecting the keratin-associated protein (KAP) cluster in a locus-specific manner. Our analysis revealed that these deletions may indeed affect phenotype and likely evolved under geography-specific positive selection. We outline all the major software and data sets for these analyses and provide the basic R and Perl codes we used for this example workflow analysis. Overall, we hope that this review will encourage and facilitate incorporation of genomic structural variation in anthropological research programs.
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28
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Guillot EG, Hazelton ML, Karafet TM, Lansing JS, Sudoyo H, Cox MP. Relaxed Observance of Traditional Marriage Rules Allows Social Connectivity without Loss of Genetic Diversity. Mol Biol Evol 2015; 32:2254-62. [PMID: 25968961 PMCID: PMC4540962 DOI: 10.1093/molbev/msv102] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Marriage rules, the community prescriptions that dictate who an individual can or cannot marry, are extremely diverse and universally present in traditional societies. A major focus of research in the early decades of modern anthropology, marriage rules impose social and economic forces that help structure societies and forge connections between them. However, in those early anthropological studies, the biological benefits or disadvantages of marriage rules could not be determined. We revisit this question by applying a novel simulation framework and genome-wide data to explore the effects of Asymmetric Prescriptive Alliance, an elaborate set of marriage rules that has been a focus of research for many anthropologists. Simulations show that strict adherence to these marriage rules reduces genetic diversity on the autosomes, X chromosome and mitochondrial DNA, but relaxed compliance produces genetic diversity similar to random mating. Genome-wide data from the Indonesian community of Rindi, one of the early study populations for Asymmetric Prescriptive Alliance, are more consistent with relaxed compliance than strict adherence. We therefore suggest that, in practice, marriage rules are treated with sufficient flexibility to allow social connectivity without significant degradation of biological diversity.
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Affiliation(s)
- Elsa G Guillot
- Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | - Martin L Hazelton
- Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | | | | | | | - Murray P Cox
- Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
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29
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Heyer E, Brandenburg JT, Leonardi M, Toupance B, Balaresque P, Hegay T, Aldashev A, Austerlitz F. Patrilineal populations show more male transmission of reproductive success than cognatic populations in Central Asia, which reduces their genetic diversity. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 157:537-43. [PMID: 25821184 DOI: 10.1002/ajpa.22739] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 02/19/2015] [Accepted: 02/22/2015] [Indexed: 11/10/2022]
Abstract
OBJECTIVE The extent to which social organization of human societies impacts the patterns of genetic diversity remains an open question. Here, we investigate the transmission of reproductive success in patrilineal and cognatic populations from Central Asia using a coalescent approach. METHODS We performed a study on the mitochondrial DNA (mtDNA) and Y chromosome polymorphism of patrilineal and cognatic populations from Central Asia. We reconstructed the gene genealogies in each population for both kind of markers and inferred the imbalance level of these genealogies, a parameter directly related to the level of transmission of reproductive success. RESULTS This imbalance level appeared much stronger for the Y chromosome in patrilineal populations than in cognatic populations, while no difference was found for mtDNA. Furthermore, we showed that this imbalance level correlates negatively with Y-chromosomal, mtDNA, and autosomal genetic diversity. CONCLUSIONS This shows that patrilineality might be one of the factors explaining the male transmission of reproductive success, which, in turn, lead to a reduction of genetic diversity. Thus, notwithstanding the fact that our population genetic approach clearly shows that there is a strong male-biased transmission of reproductive success in patrilineal societies, it also highlights the fact that a social process such as cultural transmission of reproductive success could play an important role in shaping human genetic diversity, although we cannot formally exclude that this transmission has also a genetic component.
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Affiliation(s)
- Evelyne Heyer
- Museum National D'histoire Naturelle, CNRS, Université Paris 7 Diderot, Sorbonne Paris Cité, Sorbonne Universités, Unité Eco-Anthropologie Et Ethnobiologie (UMR7206), Paris, France
| | - Jean-Tristan Brandenburg
- Museum National D'histoire Naturelle, CNRS, Université Paris 7 Diderot, Sorbonne Paris Cité, Sorbonne Universités, Unité Eco-Anthropologie Et Ethnobiologie (UMR7206), Paris, France.,INRA, UMR 0320/UMR 8120 Génétique Végétale, Ferme Du Moulon, Gif-sur-Yvette, 91190, France
| | - Michela Leonardi
- Museum National D'histoire Naturelle, CNRS, Université Paris 7 Diderot, Sorbonne Paris Cité, Sorbonne Universités, Unité Eco-Anthropologie Et Ethnobiologie (UMR7206), Paris, France.,Human Evolutionary Anthropology Group, Department of Anthropology, University College London, UK
| | - Bruno Toupance
- Museum National D'histoire Naturelle, CNRS, Université Paris 7 Diderot, Sorbonne Paris Cité, Sorbonne Universités, Unité Eco-Anthropologie Et Ethnobiologie (UMR7206), Paris, France
| | - Patricia Balaresque
- Laboratoire Anthropologie Moléculaire Et Imagerie De Synthèse, Unité Mixte De Recherche 5288 Centre National De La Recherche Scientifique-Université Paul Sabatier, Toulouse, 31073, France
| | - Tanya Hegay
- Academy of Sciences, Institute of Immunology, Tashkent, Uzbekistan
| | - Almaz Aldashev
- National Academy of Sciences of Kyrgyzstan, Bishkek, Kyrgyz Republic
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Palstra FP, Heyer E, Austerlitz F. Statistical inference on genetic data reveals the complex demographic history of human populations in central Asia. Mol Biol Evol 2015; 32:1411-24. [PMID: 25678589 DOI: 10.1093/molbev/msv030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The demographic history of modern humans constitutes a combination of expansions, colonizations, contractions, and remigrations. The advent of large scale genetic data combined with statistically refined methods facilitates inference of this complex history. Here we study the demographic history of two genetically admixed ethnic groups in Central Asia, an area characterized by high levels of genetic diversity and a history of recurrent immigration. Using Approximate Bayesian Computation, we infer that the timing of admixture markedly differs between the two groups. Admixture in the traditionally agricultural Tajiks could be dated back to the onset of the Neolithic transition in the region, whereas admixture in Kyrgyz is more recent, and may have involved the westward movement of Turkic peoples. These results are confirmed by a coalescent method that fits an isolation-with-migration model to the genetic data, with both Central Asian groups having received gene flow from the extremities of Eurasia. Interestingly, our analyses also uncover signatures of gene flow from Eastern to Western Eurasia during Paleolithic times. In conclusion, the high genetic diversity currently observed in these two Central Asian peoples most likely reflects the effects of recurrent immigration that likely started before historical times. Conversely, conquests during historical times may have had a relatively limited genetic impact. These results emphasize the need for a better understanding of the genetic consequences of transmission of culture and technological innovations, as well as those of invasions and conquests.
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Affiliation(s)
- Friso P Palstra
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206, Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot, Paris, France
| | - Evelyne Heyer
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206, Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot, Paris, France
| | - Frédéric Austerlitz
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206, Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot, Paris, France
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Aimé C, Heyer E, Austerlitz F. Inference of sex-specific expansion patterns in human populations from Y-chromosome polymorphism. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 157:217-25. [PMID: 25662940 DOI: 10.1002/ajpa.22707] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 01/13/2015] [Indexed: 11/10/2022]
Abstract
Studying the current distribution of genetic diversity in humans has important implications for our understanding of the history of our species. We analyzed a set of linked STR and SNP loci from the paternally inherited Y chromosome to infer the past demography of 55 African and Eurasian populations, using both the parametric and nonparametric coalescent-based methods implemented in the BEAST application. We inferred expansion events in most sedentary farmer populations, while we found constant effective population sizes for both nomadic hunter-gatherers and seminomadic herders. Our results differed, on several aspects, from previous results on mtDNA and autosomal markers. First, we found more recent expansion patterns in Eurasia than in Africa. This discrepancy, substantially stronger than the ones found with the other kind of markers, may result from a lower effective population size for men, which might have made male-transmitted markers more sensitive to the out-of-Africa bottleneck. Second, we found expansion signals only for sedentary farmers but not for nomadic herders in Central Asia, while these signals were found for both kind of populations in this area when using mtDNA or autosomal markers. Expansion signals in this area may result from spatial expansion processes and may have been erased for the Y chromosome among the herders because of restricted male gene flow.
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Affiliation(s)
- Carla Aimé
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206 (Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot), Museum National d'Histoire Naturelle, F-75231, Paris, France
| | - Evelyne Heyer
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206 (Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot), Museum National d'Histoire Naturelle, F-75231, Paris, France
| | - Frédéric Austerlitz
- Laboratoire d'Eco-Anthropologie et Ethnobiologie, UMR 7206 (Muséum National d'Histoire Naturelle-Centre National de la Recherche Scientifique-Université Paris 7 Diderot), Museum National d'Histoire Naturelle, F-75231, Paris, France
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Ovchinnikov IV, Malek MJ, Drees K, Kholina OI. Mitochondrial DNA variation in Tajiks living in Tajikistan. Leg Med (Tokyo) 2014; 16:390-5. [DOI: 10.1016/j.legalmed.2014.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Revised: 07/31/2014] [Accepted: 07/31/2014] [Indexed: 11/27/2022]
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Abstract
Sex-biased admixture has been observed in a wide variety of admixed populations. Genetic variation in sex chromosomes and functions of quantities computed from sex chromosomes and autosomes have often been examined to infer patterns of sex-biased admixture, typically using statistical approaches that do not mechanistically model the complexity of a sex-specific history of admixture. Here, expanding on a model of Verdu and Rosenberg (2011) that did not include sex specificity, we develop a model that mechanistically examines sex-specific admixture histories. Under the model, multiple source populations contribute to an admixed population, potentially with their male and female contributions varying over time. In an admixed population descended from two source groups, we derive the moments of the distribution of the autosomal admixture fraction from a specific source population as a function of sex-specific introgression parameters and time. Considering admixture processes that are constant in time, we demonstrate that surprisingly, although the mean autosomal admixture fraction from a specific source population does not reveal a sex bias in the admixture history, the variance of autosomal admixture is informative about sex bias. Specifically, the long-term variance decreases as the sex bias from a contributing source population increases. This result can be viewed as analogous to the reduction in effective population size for populations with an unequal number of breeding males and females. Our approach suggests that it may be possible to use the effect of sex-biased admixture on autosomal DNA to assist with methods for inference of the history of complex sex-biased admixture processes.
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Guillot EG, Cox MP. SMARTPOP: inferring the impact of social dynamics on genetic diversity through high speed simulations. BMC Bioinformatics 2014; 15:175. [PMID: 24913447 PMCID: PMC4064502 DOI: 10.1186/1471-2105-15-175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 06/03/2014] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Social behavior has long been known to influence patterns of genetic diversity, but the effect of social processes on population genetics remains poorly quantified - partly due to limited community-level genetic sampling (which is increasingly being remedied), and partly to a lack of fast simulation software to jointly model genetic evolution and complex social behavior, such as marriage rules. RESULTS To fill this gap, we have developed SMARTPOP - a fast, forward-in-time genetic simulator - to facilitate large-scale statistical inference on interactions between social factors, such as mating systems, and population genetic diversity. By simultaneously modeling genetic inheritance and dynamic social processes at the level of the individual, SMARTPOP can simulate a wide range of genetic systems (autosomal, X-linked, Y chromosomal and mitochondrial DNA) under a range of mating systems and demographic models. Specifically designed to enable resource-intensive statistical inference tasks, such as Approximate Bayesian Computation, SMARTPOP has been coded in C++ and is heavily optimized for speed and reduced memory usage. CONCLUSION SMARTPOP rapidly simulates population genetic data under a wide range of demographic scenarios and social behaviors, thus allowing quantitative analyses to address complex socio-ecological questions.
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Affiliation(s)
- Elsa G Guillot
- Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University Palmerston North, New Zealand
| | - Murray P Cox
- Statistics and Bioinformatics Group, Institute of Fundamental Sciences, Massey University Palmerston North, New Zealand
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Heyer E, Georges M, Pachner M, Endicott P. Genetic diversity of four Filipino negrito populations from Luzon: comparison of male and female effective population sizes and differential integration of immigrants into Aeta and Agta communities. Hum Biol 2013; 85:189-208. [PMID: 24297226 DOI: 10.3378/027.085.0310] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2013] [Indexed: 11/05/2022]
Abstract
Genetic data corresponding to four negrito populations (two Aeta and two Agta; n = 120) from the Luzon region of the Philippines have been analyzed. These data comprise mitochondrial DNA (mtDNA) hypervariable segment 1 haplotypes and haplogroups, Y-chromosome haplogroups and short tandem repeats (STRs), autosomal STRs, and X-chromosome STRs. The genetic diversity and structure of the populations were investigated at a local, regional, and interregional level. We found a high level of autosomal differentiation, combined with no significant reduction in diversity, consistent with long-term settlement of the Luzon region by the ancestors of the Agta and Aeta followed by reduced gene flow between these two ethnolinguistic groups. Collectively, the Aeta have a much higher ratio of female:male effective population size than do the Agta, a finding that supports phylogenetic analysis of their mtDNA and Y-chromosome haplogroups, which suggests different genetic sex-biased contributions from putative Austronesian source populations. We propose that factors of social organization that led to the reduction in Agta female effective population size may also be linked to the limited incorporation of female lineages associated with the settlement of the Philippines by Austronesian speakers; conversely, the reduction in Aeta male effective population size, relative to females, could be indicative of a limited incorporation of male lineages associated with this demographic process.
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Affiliation(s)
- E Heyer
- UMR7206, EcoAnthropologie et Ethnobiologie, MNHN, CNRS, Université Paris Diderot, Paris, France
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36
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Aimé C, Laval G, Patin E, Verdu P, Ségurel L, Chaix R, Hegay T, Quintana-Murci L, Heyer E, Austerlitz F. Human genetic data reveal contrasting demographic patterns between sedentary and nomadic populations that predate the emergence of farming. Mol Biol Evol 2013; 30:2629-44. [PMID: 24063884 DOI: 10.1093/molbev/mst156] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Demographic changes are known to leave footprints on genetic polymorphism. Together with the increased availability of large polymorphism data sets, coalescent-based methods allow inferring the past demography of populations from their present-day patterns of genetic diversity. Here, we analyzed both nuclear (20 noncoding regions) and mitochondrial (HVS-I) resequencing data to infer the demographic history of 66 African and Eurasian human populations presenting contrasting lifestyles (nomadic hunter-gatherers, nomadic herders, and sedentary farmers). This allowed us to investigate the relationship between lifestyle and demography and to address the long-standing debate about the chronology of demographic expansions and the Neolithic transition. In Africa, we inferred expansion events for farmers, but constant population sizes or contraction events for hunter-gatherers. In Eurasia, we inferred higher expansion rates for farmers than herders with HVS-I data, except in Central Asia and Korea. Although isolation and admixture processes could have impacted our demographic inferences, these processes alone seem unlikely to explain the contrasted demographic histories inferred in populations with different lifestyles. The small expansion rates or constant population sizes inferred for herders and hunter-gatherers may thus result from constraints linked to nomadism. However, autosomal data revealed contraction events for two sedentary populations in Eurasia, which may be caused by founder effects. Finally, the inferred expansions likely predated the emergence of agriculture and herding. This suggests that human populations could have started to expand in Paleolithic times, and that strong Paleolithic expansions in some populations may have ultimately favored their shift toward agriculture during the Neolithic.
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Affiliation(s)
- Carla Aimé
- Laboratoire Eco-Anthropologie et Ethnobiologie, UMR 7206, Muséum National d'Histoire Naturelle, Centre National de la Recherche Scientifique, Université Paris 7 Diderot, Paris, France
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Gubina MA, Girgol’kau LA, Babenko VN, Damba LD, Maksimov VN, Voevoda MI. Mitochondrial DNA polymorphism in populations of aboriginal residents of the Far East. RUSS J GENET+ 2013. [DOI: 10.1134/s1022795413070065] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pijpe J, de Voogt A, van Oven M, Henneman P, van der Gaag KJ, Kayser M, de Knijff P. Indian Ocean crossroads: human genetic origin and population structure in the Maldives. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 151:58-67. [PMID: 23526367 PMCID: PMC3652038 DOI: 10.1002/ajpa.22256] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Accepted: 02/05/2013] [Indexed: 11/07/2022]
Abstract
The Maldives are an 850 km-long string of atolls located centrally in the northern Indian Ocean basin. Because of this geographic situation, the present-day Maldivian population has potential for uncovering genetic signatures of historic migration events in the region. We therefore studied autosomal DNA-, mitochondrial DNA-, and Y-chromosomal DNA markers in a representative sample of 141 unrelated Maldivians, with 119 from six major settlements. We found a total of 63 different mtDNA haplotypes that could be allocated to 29 mtDNA haplogroups, mostly within the M, R, and U clades. We found 66 different Y-STR haplotypes in 10 Y-chromosome haplogroups, predominantly H1, J2, L, R1a1a, and R2. Parental admixture analysis for mtDNA- and Y-haplogroup data indicates a strong genetic link between the Maldive Islands and mainland South Asia, and excludes significant gene flow from Southeast Asia. Paternal admixture from West Asia is detected, but cannot be distinguished from admixture from South Asia. Maternal admixture from West Asia is excluded. Within the Maldives, we find a subtle genetic substructure in all marker systems that is not directly related to geographic distance or linguistic dialect. We found reduced Y-STR diversity and reduced male-mediated gene flow between atolls, suggesting independent male founder effects for each atoll. Detected reduced female-mediated gene flow between atolls confirms a Maldives-specific history of matrilocality. In conclusion, our new genetic data agree with the commonly reported Maldivian ancestry in South Asia, but furthermore suggest multiple, independent immigration events and asymmetrical migration of females and males across the archipelago.
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Affiliation(s)
- Jeroen Pijpe
- Department of Human Genetics, Leiden University Medical Center, Postzone S5, 2300 RC Leiden, The Netherlands.
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Sanchez-Faddeev H, Pijpe J, van der Hulle T, Meij HJ, van der Gaag KJ, Slagboom PE, Westendorp RGJ, de Knijff P. The influence of clan structure on the genetic variation in a single Ghanaian village. Eur J Hum Genet 2013; 21:1134-9. [PMID: 23443025 PMCID: PMC3778349 DOI: 10.1038/ejhg.2013.12] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 12/18/2012] [Accepted: 01/10/2013] [Indexed: 11/09/2022] Open
Abstract
Socioeconomic and cultural factors are thought to have an important role in influencing human population genetic structure. To explain such population structure differences, most studies analyse genetic differences among widely dispersed human populations. In contrast, we have studied the genetic structure of an ethnic group occupying a single village in north-eastern Ghana. We found a markedly skewed male population substructure because of an almost complete lack of male gene flow among Bimoba clans in this village. We also observed a deep male substructure within one of the clans in this village. Among all males, we observed only three Y-single-nucleotide polymorphism (SNP) haplogroups: E1b1a*-M2, E1b1a7a*-U174 and E1b1a8a*-U209, P277, P278. In contrast to the marked Y-chromosomal substructure, mitochondrial DNA HVS-1 sequence variation and autosomal short-tandem repeats variation patterns indicate high genetic diversities and a virtually random female-mediated gene flow among clans. On the extreme micro-geographical scale of this single Bimoba village, correspondence between the Y-chromosome lineages and clan membership could be due to the combined effects of the strict patrilocal and patrilineal structure. If translated to larger geographic scales, our results would imply that the extent of variation in uniparentally inherited genetic markers, which are typically associated with historical migration on a continental scale, could equally likely be the result of many small and different cumulative effects of social factors such as clan membership that act at a local scale. Such local scale effects should therefore be considered in genetic studies, especially those that use uniparental markers, before making inferences about human history at large.
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Affiliation(s)
- Hernando Sanchez-Faddeev
- 1] Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands [2] Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
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40
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Raaum RL, Al-Meeri A, Mulligan CJ. Culture modifies expectations of kinship and sex-biased dispersal patterns: A case study of patrilineality and patrilocality in tribal yemen. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 150:526-38. [PMID: 23359210 DOI: 10.1002/ajpa.22220] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 12/05/2012] [Indexed: 01/08/2023]
Affiliation(s)
| | - Ali Al-Meeri
- Department of Biochemistry and Molecular Biology; Sana'a University; Sana'a; Yemen
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41
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Vasseur E, Quintana-Murci L. The impact of natural selection on health and disease: uses of the population genetics approach in humans. Evol Appl 2013; 6:596-607. [PMID: 23789027 PMCID: PMC3684741 DOI: 10.1111/eva.12045] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 12/13/2012] [Indexed: 01/09/2023] Open
Abstract
Investigations of the legacy of natural selection in the human genome have proved particularly informative, pinpointing functionally important regions that have participated in our genetic adaptation to the environment. Furthermore, genetic dissection of the intensity and type of selection acting on human genes can be used to predict involvement in different forms and severities of human diseases. We review here the progress made in population genetics studies toward understanding the effects of selection, in its different forms and intensities, on human genome diversity. We discuss some outstanding, robust examples of genes and biological functions subject to strong dietary, climatic and pathogen selection pressures. We also explore the possible relationship between cancer and natural selection, a topic that has been largely neglected because cancer is generally seen as a late-onset disease. Finally, we discuss how the present-day incidence of some diseases of modern societies may represent a by-product of past adaptation to other selective forces and changes in lifestyle. This perspective thus illustrates the value of adopting a population genetics approach in delineating the biological mechanisms that have played a major evolutionary role in the way humans have genetically adapted to different environments and lifestyles over time.
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Affiliation(s)
- Estelle Vasseur
- Institut Pasteur, Unit of Human Evolutionary Genetics 75015, Paris, France ; Centre National de la Recherche Scientifique, URA 3012 75015, Paris, France ; Centre National de la Recherche Scientifique, UMR 5174, Evolution et Diversité Biologique 31062, Toulouse, France ; Université de Toulouse 31062, Toulouse, France
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42
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Verdu P, Becker NSA, Froment A, Georges M, Grugni V, Quintana-Murci L, Hombert JM, Van der Veen L, Le Bomin S, Bahuchet S, Heyer E, Austerlitz F. Sociocultural behavior, sex-biased admixture, and effective population sizes in Central African Pygmies and non-Pygmies. Mol Biol Evol 2013; 30:918-37. [PMID: 23300254 DOI: 10.1093/molbev/mss328] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Sociocultural phenomena, such as exogamy or phylopatry, can largely determine human sex-specific demography. In Central Africa, diverging patterns of sex-specific genetic variation have been observed between mobile hunter-gatherer Pygmies and sedentary agricultural non-Pygmies. However, their sex-specific demography remains largely unknown. Using population genetics and approximate Bayesian computation approaches, we inferred male and female effective population sizes, sex-specific migration, and admixture rates in 23 Central African Pygmy and non-Pygmy populations, genotyped for autosomal, X-linked, Y-linked, and mitochondrial markers. We found much larger effective population sizes and migration rates among non-Pygmy populations than among Pygmies, in agreement with the recent expansions and migrations of non-Pygmies and, conversely, the isolation and stationary demography of Pygmy groups. We found larger effective sizes and migration rates for males than for females for Pygmies, and vice versa for non-Pygmies. Thus, although most Pygmy populations have patrilocal customs, their sex-specific genetic patterns resemble those of matrilocal populations. In fact, our results are consistent with a lower prevalence of polygyny and patrilocality in Pygmies compared with non-Pygmies and a potential female transmission of reproductive success in Pygmies. Finally, Pygmy populations showed variable admixture levels with the non-Pygmies, with often much larger introgression from male than from female lineages. Social discrimination against Pygmies triggering complex movements of spouses in intermarriages can explain these male-biased admixture patterns in a patrilocal context. We show how gender-related sociocultural phenomena can determine highly variable sex-specific demography among populations, and how population genetic approaches contrasting chromosomal types allow inferring detailed human sex-specific demographic history.
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Affiliation(s)
- Paul Verdu
- Department of Biology, Stanford University, USA.
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43
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Marks SJ, Levy H, Martinez-Cadenas C, Montinaro F, Capelli C. Migration distance rather than migration rate explains genetic diversity in human patrilocal groups. Mol Ecol 2012; 21:4958-69. [PMID: 22765647 DOI: 10.1111/j.1365-294x.2012.05689.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sarah J Marks
- Department of Zoology, University of Oxford, Oxford, UK
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44
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Derenko M, Malyarchuk B, Denisova G, Perkova M, Rogalla U, Grzybowski T, Khusnutdinova E, Dambueva I, Zakharov I. Complete mitochondrial DNA analysis of eastern Eurasian haplogroups rarely found in populations of northern Asia and eastern Europe. PLoS One 2012; 7:e32179. [PMID: 22363811 PMCID: PMC3283723 DOI: 10.1371/journal.pone.0032179] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 01/22/2012] [Indexed: 12/21/2022] Open
Abstract
With the aim of uncovering all of the most basal variation in the northern Asian mitochondrial DNA (mtDNA) haplogroups, we have analyzed mtDNA control region and coding region sequence variation in 98 Altaian Kazakhs from southern Siberia and 149 Barghuts from Inner Mongolia, China. Both populations exhibit the prevalence of eastern Eurasian lineages accounting for 91.9% in Barghuts and 60.2% in Altaian Kazakhs. The strong affinity of Altaian Kazakhs and populations of northern and central Asia has been revealed, reflecting both influences of central Asian inhabitants and essential genetic interaction with the Altai region indigenous populations. Statistical analyses data demonstrate a close positioning of all Mongolic-speaking populations (Mongolians, Buryats, Khamnigans, Kalmyks as well as Barghuts studied here) and Turkic-speaking Sojots, thus suggesting their origin from a common maternal ancestral gene pool. In order to achieve a thorough coverage of DNA lineages revealed in the northern Asian matrilineal gene pool, we have completely sequenced the mtDNA of 55 samples representing haplogroups R11b, B4, B5, F2, M9, M10, M11, M13, N9a and R9c1, which were pinpointed from a massive collection (over 5000 individuals) of northern and eastern Asian, as well as European control region mtDNA sequences. Applying the newly updated mtDNA tree to the previously reported northern Asian and eastern Asian mtDNA data sets has resolved the status of the poorly classified mtDNA types and allowed us to obtain the coalescence age estimates of the nodes of interest using different calibrated rates. Our findings confirm our previous conclusion that northern Asian maternal gene pool consists of predominantly post-LGM components of eastern Asian ancestry, though some genetic lineages may have a pre-LGM/LGM origin.
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Affiliation(s)
- Miroslava Derenko
- Institute of Biological Problems of the North, Russian Academy of Sciences, Magadan, Russia.
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45
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Abilev S, Malyarchuk B, Derenko M, Wozniak M, Grzybowski T, Zakharov I. The Y-chromosome C3* Star-Cluster Attributed to Genghis Khan's Descendants is Present at High Frequency in the Kerey Clan from Kazakhstan. Hum Biol 2012; 84:79-89. [DOI: 10.3378/027.084.0106] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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46
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Amorim CEG, Gontijo CC, Falcão-Alencar G, Godinho NMO, Toledo RCP, Pedrosa MAF, Luizon MR, Simões AL, Klautau-Guimãres MN, Oliveira SF. Migration in Afro-Brazilian rural communities: crossing demographic and genetic data. Hum Biol 2012; 83:509-21. [PMID: 21846207 DOI: 10.3378/027.083.0405] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Many studies have used genetic markers to understand global migration patterns of our species. However, there are only few studies of human migration on a local scale. We, therefore, researched migration dynamics in three Afro-Brazilian rural communities, using demographic data and ten Ancestry Informative Markers. In addition to the description of migration and marriage structures, we carried out genetic comparisons between the three populations, as well as between locals and migrants from each community. Genetic admixture analyses were conducted according to the gene-identity method, with Sub-Saharan Africans, Amerindians, and Europeans as parental populations. The three analyzed Afro-Brazilian rural communities consisted of 16% to 30% of migrants, most of them women. The age pyramid revealed a gap in the segment of men aged between 20 to 30 yrs. While endogamous marriages predominated, exogamous marriages were mainly patrilocal. Migration dynamics are apparently associated with matrimonial customs and other social practices of such communities. The impact of migration upon the populations' genetic composition was low but showed an increase in European alleles with a concomitant decrease in the Amerindian contribution. Admixture analysis evidenced a higher African contribution to the gene pool of the studied populations, followed by the contribution of Europeans and Amerindians, respectively.
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Affiliation(s)
- Carlos Eduardo G Amorim
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasilia, Brasilia, DF, Brazil.
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HEYER E, CHAIX R, PAVARD S, AUSTERLITZ F. Sex-specific demographic behaviours that shape human genomic variation. Mol Ecol 2011; 21:597-612. [DOI: 10.1111/j.1365-294x.2011.05406.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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48
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Marriage exchanges, seed exchanges, and the dynamics of manioc diversity. Proc Natl Acad Sci U S A 2011; 108:18249-54. [PMID: 22042843 DOI: 10.1073/pnas.1106259108] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The conservation of crop genetic resources requires understanding the different variables-cultural, social, and economic-that impinge on crop diversity. In small-scale farming systems, seed exchanges represent a key mechanism in the dynamics of crop genetic diversity, and analyzing the rules that structure social networks of seed exchange between farmer communities can help decipher patterns of crop genetic diversity. Using a combination of ethnobotanical and molecular genetic approaches, we investigated the relationships between regional patterns of manioc genetic diversity in Gabon and local networks of seed exchange. Spatially explicit Bayesian clustering methods showed that geographical discontinuities of manioc genetic diversity mirror major ethnolinguistic boundaries, with a southern matrilineal domain characterized by high levels of varietal diversity and a northern patrilineal domain characterized by low varietal diversity. Borrowing concepts from anthropology--kinship, bridewealth, and filiation--we analyzed the relationships between marriage exchanges and seed exchange networks in patrilineal and matrilineal societies. We demonstrate that, by defining marriage prohibitions, kinship systems structure social networks of exchange between farmer communities and influence the movement of seeds in metapopulations, shaping crop diversity at local and regional levels.
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Abstract
Admixed populations have been used for inferring migrations, detecting natural selection, and finding disease genes. These applications often use a simple statistical model of admixture rather than a modeling perspective that incorporates a more realistic history of the admixture process. Here, we develop a general model of admixture that mechanistically accounts for complex historical admixture processes. We consider two source populations contributing to the ancestry of a hybrid population, potentially with variable contributions across generations. For a random individual in the hybrid population at a given point in time, we study the fraction of genetic admixture originating from a specific one of the source populations by computing its moments as functions of time and of introgression parameters. We show that very different admixture processes can produce identical mean admixture proportions, but that such processes produce different values for the variance of the admixture proportion. When introgression parameters from each source population are constant over time, the long-term limit of the expectation of the admixture proportion depends only on the ratio of the introgression parameters. The variance of admixture decreases quickly over time after the source populations stop contributing to the hybrid population, but remains substantial when the contributions are ongoing. Our approach will facilitate the understanding of admixture mechanisms, illustrating how the moments of the distribution of admixture proportions can be informative about the historical admixture processes contributing to the genetic diversity of hybrid populations.
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50
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Černý V, Pereira L, Musilová E, Kujanová M, Vašíková A, Blasi P, Garofalo L, Soares P, Diallo I, Brdička R, Novelletto A. Genetic Structure of Pastoral and Farmer Populations in the African Sahel. Mol Biol Evol 2011; 28:2491-500. [DOI: 10.1093/molbev/msr067] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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