Haplogroup R1b

• 1. Introduction

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  Haplogroup R1b carries a story written not in ink or stone but in the Y-chromosomes of hundreds of millions of living men. R1b, also known by its genetic marker R-M343, is the most frequently occurring paternal lineage in Western Europe today. It turns up in strikingly different places: among Chadic-speaking groups in northern Cameroon, among the Bashkirs of Russia, and among populations scattered across the Sahel. What those populations share, a lineage traceable to a single ancestral man, raises questions about how human beings moved across the planet over thousands of years. Where did R1b begin? How did a single male line come to dominate Western Europe and simultaneously appear in the heart of Africa? And what can the bones of ancient hunter-gatherers tell us that written history cannot? The answers stretch back more than fourteen thousand years, to a skeleton found in a valley in what is now northeastern Italy.

• 2. The Oldest Ancestor

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  Villabruna 1, catalogued as individual I9030, is the earliest known carrier of R1b. This individual, classified as a Western Hunter-Gatherer, was buried in the Cismon valley of what is now Veneto, Italy, roughly fourteen thousand years ago, in an Epigravettian culture setting. His remains represent not just an early human but the oldest confirmed anchor point for the entire R1b lineage. He belonged specifically to the R-L754 branch, which the source describes as containing the vast majority of R1b in the modern world.

  The genetic trail does not stop with Villabruna 1. Males buried between about eleven thousand two hundred and eight thousand two hundred years ago at Iron Gates Mesolithic sites in the Balkans also carried a branch of R1b, and they too were largely of Western Hunter-Gatherer ancestry with slight Eastern Hunter-Gatherer admixture. Still further north, the Zvejnieki burial ground in what is now Latvia held males of the Mesolithic Kunda culture and Neolithic Narva culture, buried between roughly ninety-five hundred and six thousand years ago, who carried another branch of R1b. The pattern that emerges from these ancient sites is one of a lineage already present across a wide arc of Europe and western Eurasia well before the Bronze Age.

  Researchers have also recovered R1b from a male buried at Lepenski Vir in Serbia around eight thousand two hundred to seven thousand nine hundred years ago, from an Eneolithic male at Khvalynsk in Russia dated to roughly seventy-two hundred to six thousand years ago, and from a Neolithic male at Els Trocs in Spain dated with unusual precision to between seven thousand one hundred seventy-eight and seven thousand and sixty-six years ago. That Spanish individual may have belonged to the Epi-Cardial culture. The geographic spread of these burials, from Iberia to the Russian steppe, underscores how widely R1b's early branches had dispersed long before any written record existed.

• 3. Into Europe and the Steppe

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  Three genetic studies published in 2015 gave renewed support to the Kurgan hypothesis associated with the scholar Marija Gimbutas, which concerns the origins of the Proto-Indo-European homeland. Those studies concluded that haplogroups R1b-M269 and R1a would have expanded from the West Eurasian Steppe together with the spread of Indo-European languages. The researchers also detected an autosomal genetic component present in modern Europeans that was absent in Neolithic Europeans, which they attributed to the arrival of paternal lineages R1b and R1a from the steppe.

  All seven males tested from the Yamnaya culture, a steppe society associated with the early Bronze Age, belonged to the R1b-M269 subclade. That finding gave ancient DNA researchers a concrete link between R1b and the population movements most widely associated with the spread of Indo-European languages into Europe. The R-Z2103 subclade specifically has been found to be prevalent in ancient DNA tied to Yamna culture contexts.

  Olalde et al. in 2017 traced the spread of R1b-M269 in western Europe, and particularly in Britain, to the expansion of the Beaker culture. Their work showed a sudden appearance of many R1b-M269 haplogroups in Western Europe roughly five thousand to four thousand five hundred years ago, at the start of the Bronze Age. Ancient DNA from early Neolithic Central and North European Linear Pottery culture settlements, by contrast, has not yet produced males carrying R1b-M269, suggesting the lineage was not present in those farming communities and arrived later with steppe-related migrations.

• 4. A Lineage Across Europe

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  R-M269 is now the most common Y-DNA lineage in European males, carried by an estimated one hundred and ten million men across the continent. Its frequency increases from east to west across Europe, reaching its peak at the national level in Wales at a rate of ninety-two percent. In Ireland it stands at eighty-two percent nationally, and in parts of Ireland it reaches as high as ninety-five percent. Scotland records seventy percent, Spain sixty-eight percent, France sixty percent (with Normandy reaching seventy-six percent), and Portugal around sixty percent. Germany and the Netherlands each sit near fifty percent, Italy at forty-seven percent, and Iceland at forty-two percent.

  Eastern Europe shows a different profile. Among North Eastern Europeans the rate in the Cruciani et al. data was about one point four percent, and among Russians around six point seven percent. South-east Europeans showed about thirteen percent. The Bashkirs of the Perm region, however, stand out: they carry R-M269 at a rate of eighty-four percent, a frequency comparable to parts of the Atlantic fringe of Europe. The Bashkirs appear in the R1b record in several distinct contexts, including a high rate of the R-M73 subclade among southeastern Bashkirs, illustrating how a single broad haplogroup can express itself through quite different branches in neighboring or related populations.

  Western European populations are largely divided between two subclades of R-M412: R-P312/S116 and R-U106/S21. The distribution of these subclades within Europe reflects, according to the source, the various migrations of the Bronze and Iron Age rather than any deep Neolithic settlement pattern. A medieval burial site excavated in Ergolding, Bavaria, dated to around AD 670, yielded four skeletons belonging to R1b with closest modern matches in Germany, Ireland, and the United States, a reminder that the pattern visible today was already largely established by the early medieval period.

• 5. The African Branch

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  R1b1a2, defined by the SNP marker V88, follows a strikingly different trajectory from its European cousins. The discovery of V88 was announced in 2010 by Cruciani et al. Most R-V88 carriers today are found not in Europe but in the Sahel, especially among populations speaking Afroasiatic languages of the Chadic branch. In northern Cameroon, some communities show extraordinary concentrations: the Ouldeme, a Chadic-speaking group, carry R-V88 at ninety-five point five percent of males sampled; the Mada at eighty-two point four percent; the Guiziga at seventy-seven point eight percent; and the Mafa at eighty-seven point five percent.

  A detailed phylogenic analysis by D'Atanasio et al. in 2018 proposed that R1b-V88 originated in Europe about twelve thousand years ago and crossed to North Africa between eight thousand and seven thousand years ago, during what researchers call the Green Sahara period, when the Sahara supported a much wetter climate and a landscape of lakes and grasslands. The main subclade within R1b-V88, called R1b-V1589, then underwent a further expansion around five thousand five hundred years ago, likely in the Lake Chad Basin, from which some lines later recrossed the Sahara northward.

  Marcus et al. in 2020 provided supporting evidence by finding the earliest basal R1b-V88 haplogroups in several Eastern European Hunter-Gatherers close to eleven thousand years ago. The lineage then appears to have spread with Neolithic farmers who established agriculture in the Western Mediterranean by around seven thousand five hundred years ago. Ancient R1b-V88 has been identified in Neolithic individuals from Germany, central Italy, Iberia, and at particularly high frequency in Sardinia. European autosomal ancestry, mitochondrial haplogroups, and lactase persistence alleles have also been found in African populations that carry R1b-V88 at high rates, such as the Fulani and Toubou, reinforcing the picture of a population movement from north to south across the Sahara. Samples from Morocco dating from around 5400 BC onward provide further evidence for the presence of European Neolithic farmers in Africa.

• 6. Famous Carriers

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  Ancient DNA analysis has connected R1b to several historically significant individuals. DNA testing on the mummy of Tutankhamun, pharaoh of the Eighteenth Dynasty of Egypt, found the Y-haplogroup R1b1a2. He inherited that lineage from his father, the mummy from tomb KV55 believed by many scholars to be Akhenaten, and from his grandfather Amenhotep III, whose remains were found in KV35. The identification places one of the most recognizable figures of ancient Egypt within a haplogroup whose roots, as the ancient DNA record shows, lie partly in Europe.

  Spytihněv I, Duke of Bohemia, is another historical figure whose remains have been DNA-tested, with results suggesting his Y-haplogroup was R1b. Closer to living memory, the House of Bourbon, which has ruled as kings in France, Spain, and other European countries across several centuries, carries the R1b1b haplogroup. That a single royal dynasty spanning multiple European thrones shares a genetic lineage with tens of millions of ordinary European men captures something of the scale at which R1b dispersed across the continent.

• 7. Deep Roots and Distant Cousins

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  R1b sits within a much older web of human genetic history. It is a subclade of the macro-haplogroup K, identified by the marker M9, which the source describes as the most common group of human male lines outside of Africa. K itself is believed to have originated in Asia. A diversification of the K-M526 cluster likely occurred in Southeast Asia, from which ancestors of haplogroups R and Q expanded westward, according to a 2014 suggestion by Karafet et al. Yet the oldest known example of R-star has been found in an Ancient North Eurasian sample known as the Mal'ta boy, dated to around twenty-four thousand years ago in Siberia. The precursor lineage P1 has been identified in another Ancient North Eurasian sample from the Yana RHS site in northern Siberia, dating to roughly thirty-one thousand six hundred years ago.

  The age of R1 itself was estimated by Tatiana Karafet et al. in 2008 at between twelve thousand five hundred and twenty-five thousand seven hundred years before present, with a most probable date of about eighteen thousand five hundred years ago. Since Villabruna 1, the oldest confirmed R1b carrier, lived about fourteen thousand years ago, R1b must have emerged relatively soon after R1 itself appeared.

  R1b also has a rare and scattered branch called R1b2, defined by the marker PH155. Living males carrying subclades of R1b2 have been found in Bahrain, Bhutan, Ladakh, Tajikistan, Turkey, Xinjiang, and Yunnan. The source notes that this branch is so rare and widely dispersed that it is difficult to draw conclusions about its origins. Its defining SNP, M335, was first documented in 2004 when an example was found in Turkey, classified at the time under a now-superseded naming system. The scattered presence of R1b2 across such a wide arc from the Middle East to the Himalayas and western China hints at a deep and as yet poorly understood history running parallel to the far better-documented western and African branches.