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Bánfai Z, Kövesdi E, Sümegi K, Büki G, Szabó A, Magyari L, Ádám V, Pálos F, Miseta A, Kásler M, Melegh B. Characterization of Danube Swabian population samples on a high-resolution genome-wide basis. BMC Genomics 2023; 24:9. [PMID: 36624381 PMCID: PMC9830925 DOI: 10.1186/s12864-022-09092-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 12/20/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND German-derived ethnicities are one of the largest ethnic groups in Hungary, dating back to the formation of the Kingdom of Hungary, which took place at the beginning of the 11th century. Germans arrived in Hungary in many waves. The most significant immigration wave took place following the collapse of the Ottoman Empire in East-Central Europe which closed the 150 year long Ottoman occupation. To date, there are no comprehensive genome-wide studies investigating the genetic makeup of the Danube Swabians. Here we analyzed 47 Danube Swabian samples collected from elderly Swabian individuals living in the Dunaszekcső-Bár area, in Danube side villages of Southwest Hungary. These Swabians, according to self-declaration, did not admix with other ethnic groups for 3-6 succeeding generations. Using Illumina Infinium 720 K Beadchip genotype data, we applied allele frequency-based and haplotype-based genome-wide marker data analyses to investigate the ancestry and genetic composition of the collected Danube Swabian samples. RESULTS Haplotype-based analyses like identity by descent segment analysis show that the investigated Danube Swabians possess significant German and other West European ancestry, but their Hungarian ancestry is also prominent. Our results suggest that their main source of ancestry can be traced back to Western Europe, presumably to the region of Germany. CONCLUSION This is the first analysis of Danube Swabian population samples based on genome-wide autosomal data. Our results establish the basis for conducting further comprehensive research on Danube Swabians and on other German ethnicities of the Carpathian basin, which can help reconstruct their origin, and identify their major archaic genomic patterns.
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Affiliation(s)
- Zsolt Bánfai
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary
| | - Erzsébet Kövesdi
- grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, Hungary, University of Pécs, Ifjúság út 12, H-7624 Pécs, Hungary
| | - Katalin Sümegi
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Department of Biochemistry and Medical Chemistry, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Gergely Büki
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary
| | - András Szabó
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary
| | - Lili Magyari
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary
| | - Valerián Ádám
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Ferenc Pálos
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary
| | - Attila Miseta
- grid.9679.10000 0001 0663 9479Department of Laboratory Medicine, Medical School, University of Pécs, Ifjúság út 13, H-7624 Pécs, Hungary
| | - Miklós Kásler
- grid.419617.c0000 0001 0667 8064National Institute of Oncology, Ráth György u. 7-9, H-1122 Budapest, Hungary
| | - Béla Melegh
- grid.9679.10000 0001 0663 9479Department of Medical Genetics, Medical School, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary ,grid.9679.10000 0001 0663 9479Szentágothai Research Centre, University of Pécs, Ifjúság út 20, H-7624 Pécs, Hungary
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Ádám V, Bánfai Z, Sümegi K, Büki G, Szabó A, Magyari L, Miseta A, Kásler M, Melegh B. Genome-Wide Marker Data-Based Comparative Population Analysis of Szeklers From Korond, Transylvania, and From Transylvania Living Non-Szekler Hungarians. Front Genet 2022; 13:841769. [PMID: 35419037 PMCID: PMC9000985 DOI: 10.3389/fgene.2022.841769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/23/2022] [Indexed: 11/13/2022] Open
Abstract
Genome-wide genotype data from 48 carefully selected population samples of Transylvania-living Szeklers and non-Szekler Hungarians were analyzed by comparative analysis. Our analyses involved contemporary Hungarians living in Hungary, other Europeans, and Eurasian samples counting 530 individuals altogether. The source of the Szekler samples was the commune of Korond, Transylvania. The analyzed non-Szekler Hungarian samples were collected from villages with a history dating back to the era of the Árpád Dynasty. Population structure by principal component analysis and ancestry analysis also revealed a great within-group similarity of the analyzed Szeklers and non-Szekler Transylvanian Hungarians. These groups also showed similar genetic patterns with each other. Haplotype analyses using identity-by-descent segment discovering tools showed that average pairwise identity-by-descent sharing is similar in the investigated populations, but the Korond Szekler samples had higher average sharing with the Hungarians from Hungary than non-Szekler Transylvanian Hungarians. Average sharing results showed that both groups are isolated compared to other Europeans, and pointed out that the non-Szekler Transylvanian Hungarian inhabitants of the investigated Árpád Age villages are more isolated than investigated Szeklers from Korond. This was confirmed by our autozygosity analysis as well. Identity-by-descent segment analyses and 4-population tests also confirmed that these Hungarian-speaking Transylvanian ethnic groups are strongly related to Hungarians living in Hungary.
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Affiliation(s)
- Valerián Ádám
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary
| | - Zsolt Bánfai
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Katalin Sümegi
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Gergely Büki
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - András Szabó
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Lili Magyari
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Attila Miseta
- Department of Laboratory Medicine, Medical School, University of Pécs, Pécs, Hungary
| | | | - Béla Melegh
- Department of Medical Genetics, Medical School, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
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Ádám V, Bánfai Z, Maász A, Sümegi K, Miseta A, Melegh B. Investigating the genetic characteristics of the Csangos, a traditionally Hungarian speaking ethnic group residing in Romania. J Hum Genet 2020; 65:1093-1103. [PMID: 32653894 DOI: 10.1038/s10038-020-0799-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/23/2020] [Accepted: 06/27/2020] [Indexed: 11/09/2022]
Abstract
Csango people are an East-Central European ethnographic group living mostly in the historical region of Moldavia, Romania. Their traditional language, the Csango is an old Hungarian dialect, which is a severely endangered language due to language shift. Their origin is still disputed among experts and there are many hypotheses since the 19th century. Previous genetic studies found connection with ethnic groups living in Hungary and provided evidence which might support their Hungarian origin. Another study found Inner Asian Altaic ancestry in their genetic makeup. The goal of this study was to analyze the genetic characteristics of the Csango people by comparing their genetic characteristics to contemporary Eurasian populations based on genome-wide autosomal marker data. Our findings suggest that genetic affinity of Csangos to Hungarians is more significant than to Romanians. They also have a detectable connection with Central-Asian and Siberian Turkic ethnic groups. Besides the presumable Middle Eastern/Central-Asian Turkic ancestry, Csangos show ~4% Turkic ancestry from Central Asia/Siberia, which makes them unique in comparison to all other East-Central European populations investigated in this study. The admixture that resulted in this Turkic ancestry could have occurred 30-40 generations ago, which date interval corresponds to Hungarian historical events regarding their migration and the conquest of the Carpathian basin.
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Affiliation(s)
- Valerián Ádám
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Zsolt Bánfai
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary. .,Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
| | - Anita Maász
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Katalin Sümegi
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary.,Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Attila Miseta
- Department of Laboratory Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Béla Melegh
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary. .,Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
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Bánfai Z, Ádám V, Pöstyéni E, Büki G, Czakó M, Miseta A, Melegh B. Revealing the impact of the Caucasus region on the genetic legacy of Romani people from genome-wide data. PLoS One 2018; 13:e0202890. [PMID: 30199533 PMCID: PMC6130880 DOI: 10.1371/journal.pone.0202890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 08/11/2018] [Indexed: 11/19/2022] Open
Abstract
Romani people are a significant minority in Europe counting about 10 million individuals scattered throughout the continent. They are a migratory group originating from Northwestern India. Their exodus from India occurred approximately 1000–1500 years ago. The migration route of the Romani people was reconstructed with the help of cultural anthropology, linguistics and historical records. Their migration made them through Central Asia, Middle East and the Caucasus region, prior to the arriving into Europe. Yet the significance of these regions, especially of the Caucasus, in Roma ancestry was a rather neglected topic. Contribution of the Caucasus and further affected regions to the ancestry of Roma was investigated based on genome-wide autosomal marker data. 158 European Roma samples and 41 populations from the Caucasus region, from Middle East, Central Asia and from South Asia were considered in our tests. Population structure and ancestry analysis algorithms were applied to investigate the relationship of Roma with these populations. Identical by descent DNA segment analyses and admixture linkage disequilibrium based tests were also applied. Our results suggest that the Caucasus region plays also a significant role in the genetic legacy of Romani people besides the main sources, Europe and South Asia, previously investigated by other population genetic studies. The Middle East and Central Asia seems slightly less important but far from negligible in connection with the sources of Roma ancestry. Our results point out that the Caucasus region and altogether the area of the Caspian and Black Seas had a significant role in the migration of Romani people towards Europe and contributed significantly to the genetic legacy of Roma rival to the European and Indian main sources.
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Affiliation(s)
- Zsolt Bánfai
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Valerián Ádám
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Etelka Pöstyéni
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Gergely Büki
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Márta Czakó
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Attila Miseta
- University of Pécs, Medical School, Department of Laboratory Medicine, Pécs, Hungary
| | - Béla Melegh
- Department of Medical Genetics, Clinical Centre, University of Pécs, Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, Pécs, Hungary
- * E-mail:
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