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MacRoberts RA, Liberato M, Roca-Rada X, Valente MJ, Relvado C, Matos Fernandes T, Barrocas Dias C, Llamas B, Vasconcelos Vilar H, Schöne BR, Ribeiro S, Santos JF, Teixeira JC, Maurer AF. Shrouded in history: Unveiling the ways of life of an early Muslim population in Santarém, Portugal (8th- 10th century AD). PLoS One 2024; 19:e0299958. [PMID: 38446809 PMCID: PMC10917335 DOI: 10.1371/journal.pone.0299958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 02/19/2024] [Indexed: 03/08/2024] Open
Abstract
In around 716 AD, the city of Santarém, Portugal, was conquered by the Berber and Arab armies that swept the Iberian Peninsula and went on to rule the region until the 12th century. Archaeological excavations in 2007/08 discovered an Islamic necropolis (Avenida 5 de Outubro #2-8) that appears to contain the remains of an early Muslim population in Santarém (8th- 10th century). In this study, skeletal material from 58 adult individuals was analysed for stable carbon (δ13Ccol; δ13Cap), nitrogen (δ15N) and sulphur (δ34S) isotope ratios in bones, and stable oxygen (δ18O), carbon (δ13Cen) and radiogenic strontium (87Sr/86Sr) isotopes in tooth enamel. The results of this study revealed a dietary pattern of predominantly C3-plant and domestic C3-fed herbivore consumption during adulthood (δ13Ccol and δ15N, respectively) but a higher proportion of C4-plant input during childhood (δ13Cen) for some individuals-interpreted as possible childhood consumption of millet porridge, a common practice in North Africa-in those with unorthodox burial types (Groups 1 and 2) that was not practiced in the individuals with canonical burials (Group 3). In this first mobility study of a medieval Muslim population in Portugal, δ18ODW values revealed greater heterogeneity in Groups 1 and 2, consistent with diverse origins, some in more humid regions than Santarém when compared to regional precipitation δ18O data, contrasting the more homogenous Group 3, consistent with the local precipitation δ18O range. Ancient DNA analysis conducted on three individuals revealed maternal (mtDNA) and paternal (Y-chromosome) lineages compatible with a North African origin for (at least) some of the individuals. Additionally, mobility of females in this population was higher than males, potentially resulting from a patrilocal social system, practiced in Berber and Arab communities. These results serve to offer a more detailed insight into the ancestry and cultural practices of early Muslim populations in Iberia.
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Affiliation(s)
| | - Marco Liberato
- Centro de Estudos de Arqueologia, Artes e Ciências do Património (CEAACP), Universidade de Coimbra, Coimbra, Portugal
| | - Xavier Roca-Rada
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, Australia
- Faculdade de Letras, University of Coimbra, Coimbra, Portugal
| | - Maria João Valente
- Faculdade de Ciências Humanas e Sociais (FCHS), Universidade do Algarve, Faro, Portugal
| | - Claudia Relvado
- Interdisciplinary Center for Archaeology and Evolution of Human Behaviour (ICArEHB), University of Algarve, Faro, Portugal
| | - Teresa Matos Fernandes
- School of Technology Sciences, Department of Biology, University of Évora, Évora, Portugal
- Research Centre for Anthropology and Health (CIAS), University of Coimbra, Coimbra, Portugal
| | - Cristina Barrocas Dias
- HERCULES Laboratory and IN2PAST, University of Évora, Évora, Portugal
- School of Technology Sciences, Department of Chemistry and Biochemistry, University of Évora, Évora, Portugal
| | - Bastien Llamas
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, Australia
| | | | - Bernd R. Schöne
- Institute of Geosciences, University of Mainz, Mainz, Germany
| | - Sara Ribeiro
- Geobiotec, Department of Geosciences, University of Aveiro, Aveiro, Portugal
| | | | - João C. Teixeira
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, Australia
- Centre for Interdisciplinary Studies (CEIS20), University of Coimbra, Coimbra, Portugal
- Evolution of Cultural Diversity Initiative, The Australian National University, Canberra, Australia
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Pimenta J, Lopes AM, Comas D, Amorim A, Arenas M. Evaluating the Neolithic Expansion at Both Shores of the Mediterranean Sea. Mol Biol Evol 2017; 34:3232-3242. [DOI: 10.1093/molbev/msx256] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Soria-Boix C, Donat-Torres MP, Urios V. Contacts in the last 90,000 years over the Strait of Gibraltar evidenced by genetic analysis of wild boar (Sus scrofa). PLoS One 2017; 12:e0181929. [PMID: 28742834 PMCID: PMC5526546 DOI: 10.1371/journal.pone.0181929] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 07/10/2017] [Indexed: 12/04/2022] Open
Abstract
Contacts across the Strait of Gibraltar in the Pleistocene have been studied in different research papers, which have demonstrated that this apparent barrier has been permeable to human and fauna movements in both directions. Our study, based on the genetic analysis of wild boar (Sus scrofa), suggests that there has been contact between Africa and Europe through the Strait of Gibraltar in the Late Pleistocene (at least in the last 90,000 years), as shown by the partial analysis of mitochondrial DNA. Cytochrome b and the control region from North African wild boar indicate a close relationship with European wild boar, and even some specimens belong to a common haplotype in Europe. The analyses suggest the transformation of the wild boar phylogeography in North Africa by the emergence of a natural communication route in times when sea levels fell due to climatic changes, and possibly through human action, since contacts coincide with both the Last Glacial period and the increasing human dispersion via the strait.
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Affiliation(s)
- Carmen Soria-Boix
- Estación Biológica Terra Natura, Grupo de Investigación Zoología de Vertebrados, Universidad de Alicante, San Vicente del Raspeig, Alicante, Spain
- * E-mail: (CSB); (MPDT); (VU)
| | - Maria P. Donat-Torres
- Instituto de Investigación para la Gestión Integrada de Zonas Costeras, Universidad Politécnica de Valencia, Gandia, Valencia, Spain
- * E-mail: (CSB); (MPDT); (VU)
| | - Vicente Urios
- Estación Biológica Terra Natura, Grupo de Investigación Zoología de Vertebrados, Universidad de Alicante, San Vicente del Raspeig, Alicante, Spain
- * E-mail: (CSB); (MPDT); (VU)
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Hernández CL, Dugoujon JM, Novelletto A, Rodríguez JN, Cuesta P, Calderón R. The distribution of mitochondrial DNA haplogroup H in southern Iberia indicates ancient human genetic exchanges along the western edge of the Mediterranean. BMC Genet 2017; 18:46. [PMID: 28525980 PMCID: PMC5437654 DOI: 10.1186/s12863-017-0514-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 05/11/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The structure of haplogroup H reveals significant differences between the western and eastern edges of the Mediterranean, as well as between the northern and southern regions. Human populations along the westernmost Mediterranean coasts, which were settled by individuals from two continents separated by a relatively narrow body of water, show the highest frequencies of mitochondrial haplogroup H. These characteristics permit the analysis of ancient migrations between both shores, which may have occurred via primitive sea crafts and early seafaring. We collected a sample of 750 autochthonous people from the southern Iberian Peninsula (Andalusians from Huelva and Granada provinces). We performed a high-resolution analysis of haplogroup H by control region sequencing and coding SNP screening of the 337 individuals harboring this maternal marker. Our results were compared with those of a wide panel of populations, including individuals from Iberia, the Maghreb, and other regions around the Mediterranean, collected from the literature. RESULTS Both Andalusian subpopulations showed a typical western European profile for the internal composition of clade H, but eastern Andalusians from Granada also revealed interesting traces from the eastern Mediterranean. The basal nodes of the most frequent H sub-haplogroups, H1 and H3, harbored many individuals of Iberian and Maghrebian origins. Derived haplotypes were found in both regions; haplotypes were shared far more frequently between Andalusia and Morocco than between Andalusia and the rest of the Maghreb. These and previous results indicate intense, ancient and sustained contact among populations on both sides of the Mediterranean. CONCLUSIONS Our genetic data on mtDNA diversity, combined with corresponding archaeological similarities, provide support for arguments favoring prehistoric bonds with a genetic legacy traceable in extant populations. Furthermore, the results presented here indicate that the Strait of Gibraltar and the adjacent Alboran Sea, which have often been assumed to be an insurmountable geographic barrier in prehistory, served as a frequently traveled route between continents.
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Affiliation(s)
- Candela L. Hernández
- Departamento de Zoología y Antropología Física, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Jean M. Dugoujon
- CNRS UMR 5288 Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse (AMIS), Université Paul Sabatier Toulouse III, Toulouse, France
| | | | | | - Pedro Cuesta
- Centro de Proceso de Datos, Universidad Complutense, Madrid, Spain
| | - Rosario Calderón
- Departamento de Zoología y Antropología Física, Facultad de Biología, Universidad Complutense, Madrid, Spain
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Messina F, Scano G, Contini I, Martínez-Labarga C, De Stefano GF, Rickards O. Linking between genetic structure and geographical distance: Study of the maternal gene pool in the Ethiopian population. Ann Hum Biol 2016; 44:53-69. [PMID: 26883569 DOI: 10.3109/03014460.2016.1155646] [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: 01/23/2023]
Abstract
Background The correlation between genetics and geographical distance has already been examined through the study of the dispersion of human populations, especially in terms of uniparental genetic markers. Aim The present work characterises, at the level of the mitochondrial DNA (mtDNA), two new samples of Amhara and Oromo populations from Ethiopia to evaluate the possible pattern of distribution for mtDNA variation and to test the hypothesis of the Isolation-by-Distance (IBD) model among African, European and Middle-Eastern populations. Subjects and methods This study analysed 173 individuals belonging to two ethnic groups of Ethiopia, Amhara and Oromo, by assaying HVS-I and HVS-II of mtDNA D-loop and informative coding region SNPs of mtDNA. Results The analysis suggests a relationship between genetic and geographic distances, affirming that the mtDNA pool of Africa, Europe and the Middle East might be coherent with the IBD model. Moreover, the mtDNA gene pools of the Sub-Saharan African and Mediterranean populations were very different. Conclusion In this study the pattern of mtDNA distribution, beginning with the Ethiopian plateau, was tested in the IBD model. It could be affirmed that, on a continent scale, the mtDNA pool of Africa, Europe and the Middle East might fall under the IBD model.
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Affiliation(s)
- Francesco Messina
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
| | - Giuseppina Scano
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
| | - Irene Contini
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
| | - Cristina Martínez-Labarga
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
| | - Gian Franco De Stefano
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
| | - Olga Rickards
- a Center of Molecular Anthropology for Ancient DNA Study, Department of Biology , University of Rome 'Tor Vergata' , Via della Ricerca Scientifica n. 1 , 00133 Rome , Italy
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Hernández CL, Soares P, Dugoujon JM, Novelletto A, Rodríguez JN, Rito T, Oliveira M, Melhaoui M, Baali A, Pereira L, Calderón R. Early Holocenic and Historic mtDNA African Signatures in the Iberian Peninsula: The Andalusian Region as a Paradigm. PLoS One 2015; 10:e0139784. [PMID: 26509580 PMCID: PMC4624789 DOI: 10.1371/journal.pone.0139784] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/17/2015] [Indexed: 11/18/2022] Open
Abstract
Determining the timing, identity and direction of migrations in the Mediterranean Basin, the role of "migratory routes" in and among regions of Africa, Europe and Asia, and the effects of sex-specific behaviors of population movements have important implications for our understanding of the present human genetic diversity. A crucial component of the Mediterranean world is its westernmost region. Clear features of transcontinental ancient contacts between North African and Iberian populations surrounding the maritime region of Gibraltar Strait have been identified from archeological data. The attempt to discern origin and dates of migration between close geographically related regions has been a challenge in the field of uniparental-based population genetics. Mitochondrial DNA (mtDNA) studies have been focused on surveying the H1, H3 and V lineages when trying to ascertain north-south migrations, and U6 and L in the opposite direction, assuming that those lineages are good proxies for the ancestry of each side of the Mediterranean. To this end, in the present work we have screened entire mtDNA sequences belonging to U6, M1 and L haplogroups in Andalusians--from Huelva and Granada provinces--and Moroccan Berbers. We present here pioneer data and interpretations on the role of NW Africa and the Iberian Peninsula regarding the time of origin, number of founders and expansion directions of these specific markers. The estimated entrance of the North African U6 lineages into Iberia at 10 ky correlates well with other L African clades, indicating that U6 and some L lineages moved together from Africa to Iberia in the Early Holocene. Still, founder analysis highlights that the high sharing of lineages between North Africa and Iberia results from a complex process continued through time, impairing simplistic interpretations. In particular, our work supports the existence of an ancient, frequently denied, bridge connecting the Maghreb and Andalusia.
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Affiliation(s)
- Candela L. Hernández
- Departamento de Zoología y Antropología Física, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Pedro Soares
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Braga, Portugal
| | - Jean M. Dugoujon
- CNRS UMR 5288 Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse (AMIS), Université Paul Sabatier Toulouse III, 31073 Toulouse, France
| | - Andrea Novelletto
- Dipartimento di Biologia, Università Tor Vergata di Rome, Rome, Italy
| | | | - Teresa Rito
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | - Marisa Oliveira
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
| | | | - Abdellatif Baali
- Faculté des Sciences Semlalia de Marrakech (FSSM), Université Cadi Ayyad, Marrakech, Morocco
| | - Luisa Pereira
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Faculdade de Medicina da Universidade do Porto, Porto, Portugal
| | - Rosario Calderón
- Departamento de Zoología y Antropología Física, Facultad de Biología, Universidad Complutense, Madrid, Spain
- * E-mail:
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Gomes V, Pala M, Salas A, Álvarez-Iglesias V, Amorim A, Gómez-Carballa A, Carracedo Á, Clarke DJ, Hill C, Mormina M, Shaw MA, Dunne DW, Pereira R, Pereira V, Prata MJ, Sánchez-Diz P, Rito T, Soares P, Gusmão L, Richards MB. Mosaic maternal ancestry in the Great Lakes region of East Africa. Hum Genet 2015; 134:1013-27. [PMID: 26188410 DOI: 10.1007/s00439-015-1583-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 07/04/2015] [Indexed: 01/21/2023]
Abstract
The Great Lakes lie within a region of East Africa with very high human genetic diversity, home of many ethno-linguistic groups usually assumed to be the product of a small number of major dispersals. However, our knowledge of these dispersals relies primarily on the inferences of historical, linguistics and oral traditions, with attempts to match up the archaeological evidence where possible. This is an obvious area to which archaeogenetics can contribute, yet Uganda, at the heart of these developments, has not been studied for mitochondrial DNA (mtDNA) variation. Here, we compare mtDNA lineages at this putative genetic crossroads across 409 representatives of the major language groups: Bantu speakers and Eastern and Western Nilotic speakers. We show that Uganda harbours one of the highest mtDNA diversities within and between linguistic groups, with the various groups significantly differentiated from each other. Despite an inferred linguistic origin in South Sudan, the data from the two Nilotic-speaking groups point to a much more complex history, involving not only possible dispersals from Sudan and the Horn but also large-scale assimilation of autochthonous lineages within East Africa and even Uganda itself. The Eastern Nilotic group also carries signals characteristic of West-Central Africa, primarily due to Bantu influence, whereas a much stronger signal in the Western Nilotic group suggests direct West-Central African ancestry. Bantu speakers share lineages with both Nilotic groups, and also harbour East African lineages not found in Western Nilotic speakers, likely due to assimilating indigenous populations since arriving in the region ~3000 years ago.
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Affiliation(s)
- Verónica Gomes
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
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Kefi R, Hsouna S, Ben Halim N, Lasram K, Romdhane L, Messai H, Abdelhak S. Phylogeny and genetic structure of Tunisians and their position within Mediterranean populations. ACTA ACUST UNITED AC 2014; 26:593-604. [PMID: 24491098 DOI: 10.3109/19401736.2013.879649] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tunisia is located at the crossroads of Europe, the Middle East and Sub-Saharan Africa. This position might lead to numerous waves of migrations, contributing to the current genetic landscape of Tunisians. In this study, we analyzed 815 mitochondrial DNA (mtDNA) sequences from Tunisia in order to characterize the mitochondrial DNA genetic structure of this region, to construct the processes for its composition and to compare it to other Mediterranean populations. To that end, additional 4206 mtDNA sequences were compiled from previous studies performed in African (1237), Near Eastern (231) and European (2738) populations. Both phylogenetic and statistical analyses were performed. This study confirmed the mosaic genetic structure of the Tunisian population with the predominance of the Eurasian lineages, followed by the Sub-Saharan and North African lineages. Among Tunisians, the highest haplogroup and haplotype diversity were observed in particular in the Capital Tunis. No significant differentiation was observed between both geographical (Northern versus Southern Tunisia) and different ethnic groups in Tunisia. Our results highlight the presence of outliers and most frequent unique sequences in Tunisia (10.2%) compared to 45 Mediterranean populations. Phylogenetic analysis showed that the majority of Tunisian localities were closer to North Africans and Near Eastern populations than to Europeans. The exception was found for Berbers from Jerba which are clustered with Sardinians and Valencians.
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Affiliation(s)
- Rym Kefi
- Biomedical Genomics and Oncogenetics Laboratory (LR 11 IPT 05), Institut Pasteur de Tunis, Université El Manar de Tunis , Tunis , Tunisia and
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Bekada A, Fregel R, Cabrera VM, Larruga JM, Pestano J, Benhamamouch S, González AM. Introducing the Algerian mitochondrial DNA and Y-chromosome profiles into the North African landscape. PLoS One 2013; 8:e56775. [PMID: 23431392 PMCID: PMC3576335 DOI: 10.1371/journal.pone.0056775] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2012] [Accepted: 01/15/2013] [Indexed: 11/18/2022] Open
Abstract
North Africa is considered a distinct geographic and ethnic entity within Africa. Although modern humans originated in this Continent, studies of mitochondrial DNA (mtDNA) and Y-chromosome genealogical markers provide evidence that the North African gene pool has been shaped by the back-migration of several Eurasian lineages in Paleolithic and Neolithic times. More recent influences from sub-Saharan Africa and Mediterranean Europe are also evident. The presence of East-West and North-South haplogroup frequency gradients strongly reinforces the genetic complexity of this region. However, this genetic scenario is beset with a notable gap, which is the lack of consistent information for Algeria, the largest country in the Maghreb. To fill this gap, we analyzed a sample of 240 unrelated subjects from a northwest Algeria cosmopolitan population using mtDNA sequences and Y-chromosome biallelic polymorphisms, focusing on the fine dissection of haplogroups E and R, which are the most prevalent in North Africa and Europe respectively. The Eurasian component in Algeria reached 80% for mtDNA and 90% for Y-chromosome. However, within them, the North African genetic component for mtDNA (U6 and M1; 20%) is significantly smaller than the paternal (E-M81 and E-V65; 70%). The unexpected presence of the European-derived Y-chromosome lineages R-M412, R-S116, R-U152 and R-M529 in Algeria and the rest of the Maghreb could be the counterparts of the mtDNA H1, H3 and V subgroups, pointing to direct maritime contacts between the European and North African sides of the western Mediterranean. Female influx of sub-Saharan Africans into Algeria (20%) is also significantly greater than the male (10%). In spite of these sexual asymmetries, the Algerian uniparental profiles faithfully correlate between each other and with the geography.
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Affiliation(s)
- Asmahan Bekada
- Department of Biotechnology, Faculty of Sciences, University of Oran, Oran, Algeria
| | - Rosa Fregel
- Department of Genetics, Faculty of Biology, University of La Laguna, La Laguna, Tenerife, Spain
- Department of Genetics, Faculty of Medicine, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Gran Canaria, Spain
- Forensic Genetics Laboratory, Institute of Legal Medicine of Las Palmas, Las Palmas de Gran Canaria, Gran Canaria, Spain
| | - Vicente M. Cabrera
- Department of Genetics, Faculty of Biology, University of La Laguna, La Laguna, Tenerife, Spain
| | - José M. Larruga
- Department of Genetics, Faculty of Biology, University of La Laguna, La Laguna, Tenerife, Spain
| | - José Pestano
- Department of Genetics, Faculty of Medicine, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Gran Canaria, Spain
- Forensic Genetics Laboratory, Institute of Legal Medicine of Las Palmas, Las Palmas de Gran Canaria, Gran Canaria, Spain
| | - Soraya Benhamamouch
- Department of Biotechnology, Faculty of Sciences, University of Oran, Oran, Algeria
| | - Ana M. González
- Department of Genetics, Faculty of Biology, University of La Laguna, La Laguna, Tenerife, Spain
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Catelli ML, Alvarez-Iglesias V, Gómez-Carballa A, Mosquera-Miguel A, Romanini C, Borosky A, Amigo J, Carracedo A, Vullo C, Salas A. The impact of modern migrations on present-day multi-ethnic Argentina as recorded on the mitochondrial DNA genome. BMC Genet 2011; 12:77. [PMID: 21878127 PMCID: PMC3176197 DOI: 10.1186/1471-2156-12-77] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Accepted: 08/30/2011] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The genetic background of Argentineans is a mosaic of different continental ancestries. From colonial to present times, the genetic contribution of Europeans and sub-Saharan Africans has superposed to or replaced the indigenous genetic 'stratum'. A sample of 384 individuals representing different Argentinean provinces was collected and genotyped for the first and the second mitochondrial DNA (mtDNA) hypervariable regions, and selectively genotyped for mtDNA SNPs. This data was analyzed together with additional 440 profiles from rural and urban populations plus 304 from Native American Argentineans, all available from the literature. A worldwide database was used for phylogeographic inferences, inter-population comparisons, and admixture analysis. Samples identified as belonging to hg (hg) H2a5 were sequenced for the entire mtDNA genome. RESULTS Phylogenetic and admixture analyses indicate that only half of the Native American component in urban Argentineans might be attributed to the legacy of extinct ancestral Argentineans and that the Spanish genetic contribution is slightly higher than the Italian one. Entire H2a5 genomes linked these Argentinean mtDNAs to the Basque Country and improved the phylogeny of this Basque autochthonous clade. The fingerprint of African slaves in urban Argentinean mtDNAs was low and it can be phylogeographically attributed predominantly to western African. The European component is significantly more prevalent in the Buenos Aires province, the main gate of entrance for Atlantic immigration to Argentina, while the Native American component is larger in North and South Argentina. AMOVA, Principal Component Analysis and hgs/haplotype patterns in Argentina revealed an important level of genetic sub-structure in the country. CONCLUSIONS Studies aimed to compare mtDNA frequency profiles from different Argentinean geographical regions (e.g., forensic and case-control studies) should take into account the important genetic heterogeneity of the country in order to prevent false positive claims of association in disease studies or inadequate evaluation of forensic evidence.
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Affiliation(s)
- María Laura Catelli
- Equipo Argentino de Antropología Forense, Independencia 644 - 5C, Edif.EME1, Córdoba, Argentina
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Fadhlaoui-Zid K, Rodríguez-Botigué L, Naoui N, Benammar-Elgaaied A, Calafell F, Comas D. Mitochondrial DNA structure in North Africa reveals a genetic discontinuity in the Nile Valley. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 145:107-17. [PMID: 21312180 DOI: 10.1002/ajpa.21472] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 11/16/2010] [Indexed: 11/08/2022]
Abstract
Human population movements in North Africa have been mostly restricted to an east-west direction due to the geographical barriers imposed by the Sahara Desert and the Mediterranean Sea. Although these barriers have not completely impeded human migrations, genetic studies have shown that an east-west genetic gradient exists. However, the lack of genetic information of certain geographical areas and the focus of some studies in parts of the North African landscape have limited the global view of the genetic pool of North African populations. To provide a global view of the North African genetic landscape and population structure, we have analyzed ∼2,300 North African mitochondrial DNA lineages (including 269 new sequences from Libya, in the first mtDNA study of the general Libyan population). Our results show a clinal distribution of certain haplogroups, some of them more frequent in Western (H, HV0, L1b, L3b, U6) or Eastern populations (L0a, R0a, N1b, I, J) that might be the result of human migrations from the Middle East, sub-Saharan Africa, and Europe. Despite this clinal pattern, a genetic discontinuity is found in the Libyan/Egyptian border, suggesting a differential gene flow in the Nile River Valley. Finally, frequency of the post-LGM subclades H1 and H3 is predominant in Libya within the H sequences, highlighting the magnitude of the LGM expansion in North Africa.
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Affiliation(s)
- Karima Fadhlaoui-Zid
- Laboratory of Genetics, Immunology, and Human Pathology, Faculty of Science of Tunis, University Tunis El Manar, Tunisia
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