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. 2022 Aug 26;377(6609):eabm4247.
doi: 10.1126/science.abm4247. Epub 2022 Aug 26.

The genetic history of the Southern Arc: A bridge between West Asia and Europe

Iosif Lazaridis #  1   2 Songül Alpaslan-Roodenberg #  2   3 Ayşe Acar  4 Ayşen Açıkkol  5 Anagnostis Agelarakis  6 Levon Aghikyan  7 Uğur Akyüz  8 Desislava Andreeva  9 Gojko Andrijašević  10 Dragana Antonović  11 Ian Armit  12 Alper Atmaca  13 Pavel Avetisyan  7 Ahmet İhsan Aytek  14 Krum Bacvarov  15 Ruben Badalyan  7 Stefan Bakardzhiev  16 Jacqueline Balen  17 Lorenc Bejko  18 Rebecca Bernardos  2 Andreas Bertsatos  19 Hanifi Biber  20 Ahmet Bilir  21 Mario Bodružić  22 Michelle Bonogofsky  23 Clive Bonsall  24 Dušan Borić  25 Nikola Borovinić  26 Guillermo Bravo Morante  3 Katharina Buttinger  3 Kim Callan  2   27 Francesca Candilio  28 Mario Carić  29 Olivia Cheronet  3 Stefan Chohadzhiev  30 Maria-Eleni Chovalopoulou  19 Stella Chryssoulaki  31 Ion Ciobanu  32   33 Natalija Čondić  34 Mihai Constantinescu  35 Emanuela Cristiani  36 Brendan J Culleton  37 Elizabeth Curtis  2   27 Jack Davis  38 Tatiana I Demcenco  39 Valentin Dergachev  40 Zafer Derin  41 Sylvia Deskaj  42 Seda Devejyan  7 Vojislav Djordjević  43 Kellie Sara Duffett Carlson  3 Laurie R Eccles  44 Nedko Elenski  45 Atilla Engin  46 Nihat Erdoğan  47 Sabiha Erir-Pazarcı  48 Daniel M Fernandes  3   49 Matthew Ferry  2   27 Suzanne Freilich  3 Alin Frînculeasa  50 Michael L Galaty  42 Beatriz Gamarra  51   52   53 Boris Gasparyan  7 Bisserka Gaydarska  54 Elif Genç  55 Timur Gültekin  56 Serkan Gündüz  57 Tamás Hajdu  58 Volker Heyd  59 Suren Hobosyan  7 Nelli Hovhannisyan  60 Iliya Iliev  16 Lora Iliev  2   27 Stanislav Iliev  61 İlkay İvgin  62 Ivor Janković  29 Lence Jovanova  63 Panagiotis Karkanas  64 Berna Kavaz-Kındığılı  65 Esra Hilal Kaya  66 Denise Keating  3 Douglas J Kennett  37   67 Seda Deniz Kesici  68 Anahit Khudaverdyan  7 Krisztián Kiss  58   69 Sinan Kılıç  20 Paul Klostermann  70 Sinem Kostak Boca Negra Valdes  68 Saša Kovačević  71 Marta Krenz-Niedbała  72 Maja Krznarić Škrivanko  73 Rovena Kurti  74 Pasko Kuzman  75 Ann Marie Lawson  2   27 Catalin Lazar  76 Krassimir Leshtakov  77 Thomas E Levy  78 Ioannis Liritzis  79   80 Kirsi O Lorentz  81 Sylwia Łukasik  72 Matthew Mah  2   27   82 Swapan Mallick  2   27 Kirsten Mandl  3 Kristine Martirosyan-Olshansky  83 Roger Matthews  84 Wendy Matthews  84 Kathleen McSweeney  24 Varduhi Melikyan  7 Adam Micco  2 Megan Michel  1   2   27 Lidija Milašinović  85 Alissa Mittnik  1   2   86 Janet M Monge  87 Georgi Nekhrizov  15 Rebecca Nicholls  88 Alexey G Nikitin  89 Vassil Nikolov  15 Mario Novak  29 Iñigo Olalde  2   90 Jonas Oppenheimer  2   27 Anna Osterholtz  91 Celal Özdemir  13 Kadir Toykan Özdoğan  3 Nurettin Öztürk  65 Nikos Papadimitriou  92 Niki Papakonstantinou  93 Anastasia Papathanasiou  94 Lujana Paraman  95 Evgeny G Paskary  96 Nick Patterson  1   82 Ilian Petrakiev  45 Levon Petrosyan  7 Vanya Petrova  77 Anna Philippa-Touchais  97 Ashot Piliposyan  98 Nada Pocuca Kuzman  75 Hrvoje Potrebica  99 Bianca Preda-Bălănică  59 Zrinka Premužić  100 T Douglas Price  101 Lijun Qiu  2   27 Siniša Radović  102 Kamal Raeuf Aziz  103 Petra Rajić Šikanjić  29 Kamal Rasheed Raheem  103 Sergei Razumov  104 Amy Richardson  84 Jacob Roodenberg  105 Rudenc Ruka  74 Victoria Russeva  106 Mustafa Şahin  57 Ayşegül Şarbak  107 Emre Savaş  68 Constanze Schattke  3 Lynne Schepartz  108 Tayfun Selçuk  68 Ayla Sevim-Erol  109 Michel Shamoon-Pour  110 Henry M Shephard  111 Athanasios Sideris  112 Angela Simalcsik  32   113 Hakob Simonyan  114 Vitalij Sinika  104 Kendra Sirak  2 Ghenadie Sirbu  115 Mario Šlaus  116 Andrei Soficaru  35 Bilal Söğüt  117 Arkadiusz Sołtysiak  118 Çilem Sönmez-Sözer  109 Maria Stathi  119 Martin Steskal  120 Kristin Stewardson  2   27 Sharon Stocker  38 Fadime Suata-Alpaslan  121 Alexander Suvorov  59 Anna Szécsényi-Nagy  122 Tamás Szeniczey  58 Nikolai Telnov  104 Strahil Temov  123 Nadezhda Todorova  77 Ulsi Tota  74   124 Gilles Touchais  125 Sevi Triantaphyllou  93 Atila Türker  126 Marina Ugarković  71 Todor Valchev  16 Fanica Veljanovska  123 Zlatko Videvski  123 Cristian Virag  127 Anna Wagner  3 Sam Walsh  128 Piotr Włodarczak  129 J Noah Workman  2 Aram Yardumian  130   131 Evgenii Yarovoy  132 Alper Yener Yavuz  133 Hakan Yılmaz  20 Fatma Zalzala  2   27 Anna Zettl  3 Zhao Zhang  2 Rafet Çavuşoğlu  20 Nadin Rohland  2 Ron Pinhasi  3   134 David Reich  1   2   27   82 Ruben Davtyan  7
Affiliations

The genetic history of the Southern Arc: A bridge between West Asia and Europe

Iosif Lazaridis et al. Science. .

Abstract

By sequencing 727 ancient individuals from the Southern Arc (Anatolia and its neighbors in Southeastern Europe and West Asia) over 10,000 years, we contextualize its Chalcolithic period and Bronze Age (about 5000 to 1000 BCE), when extensive gene flow entangled it with the Eurasian steppe. Two streams of migration transmitted Caucasus and Anatolian/Levantine ancestry northward, and the Yamnaya pastoralists, formed on the steppe, then spread southward into the Balkans and across the Caucasus into Armenia, where they left numerous patrilineal descendants. Anatolia was transformed by intra-West Asian gene flow, with negligible impact of the later Yamnaya migrations. This contrasts with all other regions where Indo-European languages were spoken, suggesting that the homeland of the Indo-Anatolian language family was in West Asia, with only secondary dispersals of non-Anatolian Indo-Europeans from the steppe.

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Figures

Fig. 1.
Fig. 1.. Studied individuals and PCA analysis.
(A) The geography of the Southern Arc; Sampling locations of previously published individuals (grey circle), new data on published individuals (pink square), and new individuals (yellow circle); convex hulls of individuals from each present-day country are also shown. (B) Timeline of studied individuals (random uniform jitter applied to the vertical dimension). (C) Principal components analysis of ancient individuals projected on modern West Eurasian variation. Country names represented by 3-letter ISO codes.
Fig. 2:
Fig. 2:. The Anatolian heartland.
Panels (A-E) show five components of ancestry in Anatolia from the Pottery Neolithic to the Roman/Byzantine period. Boxes in this and subsequent figures indicate the temporal extent (horizontal) and 95% confidence interval (±1.96s.e.) for each period; we also show the fit (solid line) and 5/95% (dotted lines) of the fit of a heteroskedastic Gaussian process (55) on the individuals without any assignment to populations, which allows us to appreciate the degree of variation in ancestry in each time period. The results show that across the peninsula the post-Neolithic period was characterized by expansion of Caucasus hunter-gatherer (CHG)-related ancestry (A) and dilution of northwest Anatolian-related ancestry (E). European hunter-gatherer-related ancestry from both the steppe/eastern Europe (B) and the Balkans (D) was insignificant until the last 3,000 years. A detailed look at the Chalcolithic/Bronze Age period (F) shows that populations there had ancestry intermediate between early farmers from western/central Anatolia (Barcın(10), Tepecik-Çiftlik(13), and Çatalhöyük(12)) and southeastern Anatolia (northern Mesopotamia at Mardin) on the other, the result of admixture between the preceding Neolithic populations, without discernible external influences (that would have elevated any of the five components above their Neolithic levels).
Fig. 3:
Fig. 3:. Yamnaya origins and expansions.
(A) The earliest inhabitants of the steppe (Eastern hunter-gatherers; EHG) were followed by Caucasus hunter-gatherer (CHG)-admixed populations by ~5000BCE and by Anatolian/Levantine-admixed populations by ~3000BCE with the emergence of the Yamnaya-Afanasievo genetic cluster. The proportion of Balkan hunter-gatherer-related ancestry (not shown) is 0.8±0.6% in the Yamnaya cluster and −0.5±0.5% in the Afanasievo. (B) The Yamnaya had nearly half their ancestry from CHG, higher than any Bronze Age Europeans from the Balkans, Italy, or central-northern Europe, but their CHG-EHG balance was equal, similar to the Corded Ware/Beaker clusters of central/northern Europe and contrasting with Southeastern and Mediterranean Europe where CHG was significantly higher than EHG. (95% confidence intervals of ±1.96s.e. are shown.)
Fig. 4:
Fig. 4:. Genetic heterogeneity in Southeastern Europe following the Yamnaya expansion.
Panels (A-E) show five components of ancestry in Southeastern Europe. The replacement of hunter-gatherer by early farmer ancestry (panels D and E) was followed by the rise of Caucasus hunter-gatherer (CHG) and Eastern hunter-gatherer (EHG) ancestry over the last 5,000 years (panels A and B) with Levantine ancestry being relatively unimportant and showing no discernible temporal pattern (C). In panel (F) we show a linear regression of population dates (using directly radiocarbon dated individuals for each population) on admixture times in generations; more recent populations have older admixture times, and the regression places admixture between populations related to the southeast European Neolithic and Yamnaya at 4853±205 years ago and the generation length at 28±4 years, virtually identical to its independent empirical estimation of 28 years.
Fig. 5:
Fig. 5:. A genetic history of Armenia.
Panels (A-D) show changes in the four components of ancestry. (A) Caucasus hunter-gatherer (CHG) is the most important component in all ages, rising to its maximum in the Kura-Araxes culture of the Early Bronze Age. (B) Eastern hunter-gatherer (EHG) ancestry first appears in the Chalcolithic at Areni Cave, disappears during the Kura-Araxes period, re-appears strongly in the Middle-Late Bronze Age period and decreases to ~1/3 of its peak value by ~2,000 years ago. (C, D) Levantine and Anatolian ancestry were present in all periods as minority components. Balkan hunter-gatherer ancestry (not shown) is
Fig. 6:
Fig. 6:. Y-chromosome links between the Southern Arc and the Eurasian steppe.
(A) Phylogeny of haplogroup R-L389 (R1b1a1) with TMRCA estimates of yfull.com. (B) Caucasus hunter-gatherer (CHG)/Eastern hunter-gatherer (EHG) ancestral composition of R-L389 Y-chromosome individuals. (C) R-L389 individuals from the Southern Arc, representing a subset of the individuals plotted in panel B. Individuals more than 2,000 years old are shown.

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