Haplogroup I (M170) is a

Y-chromosome DNA In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by mutations in the non- recombining portions of DNA from the male-specific Y chromosome (called Y-DNA). Many people within a haplogroup share similar numbers of sh ...

haplogroup. It is a subgroup of haplogroup IJ, which itself is a derivative of the haplogroup IJK. Subclades I1 and I2 can be found in most present-day European populations, with peaks in some

Northern Europe The northern region of Europe has several definitions. A restrictive definition may describe Northern Europe as being roughly north of the southern coast of the Baltic Sea, which is about 54th parallel north, 54°N, or may be based on other g ...

an and

Southeastern Europe Southeast Europe or Southeastern Europe (SEE) is a geographical subregion of Europe, consisting primarily of the Balkans. Sovereign states and territories that are included in the region are Albania, Bosnia and Herzegovina, Bulgaria, Croatia (al ...

an countries. Haplogroup I appears to have arisen in Europe, so far being found in Palaeolithic sites throughout Europe (Fu 2016), but not outside it. It diverged from common ancestor IJ* about 43,000 years B.P. (Karafet 2008). Early evidence for haplogroup J has been found in the Caucasus and Iran (Jones 2015, Fu 2016). In addition, living examples of the precursor Haplogroup IJ* have been found only in Iran, among the Mazandarani and ethnic

Persians The Persians are an Iranian ethnic group who comprise over half of the population of Iran. They share a common cultural system and are native speakers of the Persian language as well as of the languages that are closely related to Persian. ...

from Fars. This may indicate that IJ originated in

South West Asia Western Asia, West Asia, or Southwest Asia, is the westernmost subregion of the larger geographical region of Asia, as defined by some academics, UN bodies and other institutions. It is almost entirely a part of the Middle East, and includes Ana ...

. Haplogroup I has been found in multiple individuals belonging to the Gravettian culture. The

Gravettian The Gravettian was an archaeological industry of the European Upper Paleolithic that succeeded the Aurignacian circa 33,000 years BP. It is archaeologically the last European culture many consider unified, and had mostly disappeared by 2 ...

s expanded westwards from the far corner of Eastern Europe, likely Russia, to Central Europe. They are associated with a genetic cluster that is normally called the Věstonice cluster.

Origins

Available evidence suggests that I-M170 was preceded into areas in which it would later become dominant by haplogroups K2a (K-M2308) and C1 (Haplogroup C-F3393). K2a and C1 have been found in the oldest sequenced male remains from Western Eurasia (dating from circa 45,000 to 35,000 years BP), such as: Ust'-Ishim man (modern west Siberia) K2a*, Oase 1 (Romania) K2a*, Kostenki 14 (south west Russia) C1b, and Goyet Q116-1 (Belgium) C1a. The oldest I-M170 found is that of an individual known as Krems WA3 (lower Austria), dating from circa 33,000-24,000 BP. At the same site, two twin boys were also found, both were assigned to haplogroup I*. Haplogroup IJ was in the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...

and/or

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

about 40,000 years ago. The TMRCA (time to most recent common ancestor) for I-M170 was estimated by Karafet and colleagues in 2008 to be 22,200 years ago, with a confidence interval between 15,300 and 30,000 years ago. This would make the founding event of I-M170 approximately contemporaneous with the

Last Glacial Maximum The Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent. Ice sheets covered much of Northern North America, Northern Eur ...

(LGM), which lasted from 26,500 years ago until approximately 19,500 years ago. TMRCA is an estimate of the time of subclade divergence. Rootsi and colleagues in 2004 also note two other dates for a clade, age of STR variation, and time since population divergence. These last two dates are roughly associated, and occur somewhat after subclade divergence. For Haplogroup I-M170 they estimate time to STR variation as 24,000 ±7,100 years ago and time to population divergence as 23,000 ±7,700 years ago. These estimates are consistent with those of Karafet 2008 cited above. However, Underhill and his colleagues calculate the time to subclade divergence of I1 and I2 to be 28,400 ±5,100 years ago, although they calculate the STR variation age of I1 at only 8,100 ±1,500 years ago. Semino (2000) speculated that the initial dispersion of this population corresponds to the diffusion of the

culture. Later the haplogroup, along with two cases of Haplogroup C, was found in human remains belonging to the previously mentioned Gravettian culture and in individuals of the

Magdalenian The Magdalenian cultures (also Madelenian; French: ''Magdalénien'') are later cultures of the Upper Paleolithic and Mesolithic in western Europe. They date from around 17,000 to 12,000 years ago. It is named after the type site of La Madele ...

and Azilian cultures. Rootsi and colleagues in 2004 suggested that each of the ancestral populations now dominated by a particular subclade of Haplogroup I-M170 experienced an independent population expansion immediately after the Last Glacial Maximum. The five known cases of Haplogroup I from Upper Paleolithic European human remains make it one of the most frequent haplogroup from that period. In 2016, the 31,210–34,580-year-old remains of a hunter-gatherer from

Paglicci Cave Paglicci Cave is an archaeological site situated in Paglicci, near Rignano Garganico, Apulia, southern Italy. The cave, discovered in the 1950s, is the most important cave of Gargano. The cave is an attraction of the Gargano National Park. Desc ...

, Apulia, Italy were found to carry I-M170. So far, only Haplogroup F* and Haplogroup C1b have been documented, once each, on older remains in Europe. I2 subclade of I-M170 is the main haplogroup found on male remains in

Mesolithic The Mesolithic (Greek: μέσος, ''mesos'' 'middle' + λίθος, ''lithos'' 'stone') or Middle Stone Age is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymous ...

Europe, until circa 6,000 BCE, when

mass migration Mass migration refers to the migration of large groups of people from one geographical area to another. Mass migration is distinguished from individual or small-scale migration; and also from seasonal migration, which may occur on a regular basis ...

into Europe of Anatolian farmers carrying Y-DNA G2a happened. Due to the arrival of so-called Early European Farmers (EEFs), I-M170 is outnumbered by Haplogroup G among

Neolithic The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts ...

European remains and by Haplogroup R in later remains. The earliest documentation of I1 is from Neolithic Hungary, although it must have separated from I2 at an earlier point in time. In one instance, haplogroup I was found far from Europe, among 2,000-year-old remains from Mongolia. It would seem to be that separate waves of population movement impacted

. The role of the

Balkans The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the who ...

as a long-standing corridor to Europe from

Anatolia Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...

and/or the

Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...

is shown by the common phylogenetic origins of both haplogroups I and J in the parent haplogroup IJ (M429). This common ancestry suggests that the subclades of IJ entered the Balkans from Anatolia or the Caucasus, some time before the Last Glacial Maximum. I and J were subsequently distributed in Asia and Europe in a disjunctive phylogeographic pattern typical of "sibling" haplogroups. A natural geographical corridor like the Balkans is likely to have been used later by members of other subclades of IJ, as well as other haplogroups, including those associated with Early European Farmers. The existence of Haplogroup IJK – the ancestor of both haplogroups IJ and K (M9) – and its evolutionary distance from other subclades of Haplogroup F (M89), supports the inference that haplogroups IJ and K both arose in Southwestern Asia. Living carriers of F* and IJ* have been reported from the Iranian Plateau.

Distribution

Frequencies of Haplogroup I:

Subgroups

The subclades of Haplogroup I-M170 with their defining mutations, as of 2011.ISOGG 2011
/ref> Up-to-date phylogenetic trees listing all currently known subclades of I can be found a
Y-Full
an
FamilyTreeDNA
*I-M170 ( L41, M170, M258, P19_1, P19_2, P19_3, P19_4, P19_5, P38, P212, Page123, U179) ''Middle East, Caucasus, Europe.'' ** I-M253 Haplogroup I1 (L64, L75, L80, L81, L118, L121/S62, L123, L124/S64, L125/S65, L157, L186, L187, M253, M307.2/P203.2, M450/S109, P30, P40, S63, S66, S107, S108, S110, S111) ''Typical of populations of

Scandinavia Scandinavia; Sámi languages: /. ( ) is a subregion#Europe, subregion in Northern Europe, with strong historical, cultural, and linguistic ties between its constituent peoples. In English usage, ''Scandinavia'' most commonly refers to Denmark, ...

and Northwest Europe, with a moderate distribution throughout

Eastern Europe Eastern Europe is a subregion of the Europe, European continent. As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural, and socio-economic connotations. The vast majority of the region is covered by Russ ...

'' ''In

at 1%'' ***I1a DF29/S438 ****I1a1 CTS6364/Z2336 *****I1a1a M227 ******I1a1a1 M72 *****I1a1b L22/S142 ******I1a1b1 P109 ******I1a1b2 L205 ******I1a1b3 L287 *******I1a1b3a L258/S335 ********I1a1b3a1 L296 ******I1a1b4 L300/S241 ******I1a1b5 L813/Z719 ****I1a2 S244/Z58 *****I1a2a S246/Z59 ******I1a2a1 S337/Z60, S439/Z61, Z62 *******I1a2a1a Z140, Z141 ********I1a2a1a1 Z2535 *********I1a2a1a1a L338 ********I1a2a1a2 F2642 *******I1a2a1b Z73 *******I1a2a1c L573 *******I1a2a1d L1248 ********I1a2a1d1 L803 ******I1a2a2 Z382 *****I1a2b S296/Z138, Z139 ******I1a2b1 Z2541 ****I1a3 S243/Z63 *****I1a3a L1237 ***I1b Z131 ** I-M438 Haplogroup I2 L68/PF3781/S329, M438/P215/PF3853/S31 ***I2a L460/PF3647/S238 ****I2a1 P37.2 *****I2a1a L158/PF4073/S433, L159.1/S169.1, M26/PF4056 ******I2a1a1 L160/PF4013 *****I2a1b L178/S328, M423 ******I2a1b1 L161.1/S185 ******I2a1b2 L621/S392 *******I2a1b2a1a L147.2 *****I2a1c L233/S183 ****I2a2 L35/PF3862/S150, L37/PF6900/S153, L181, M436/P214/PF3856/S33, P216/PF3855/S30, P217/PF3854/S23, P218/S32 *****I2a2a L34/PF3857/S151, L36/S152, L59, L368, L622, M223, P219/PF3859/S24, P220/S119, P221/PF3858/S120, P222/PF3861/U250/S118, P223/PF3860/S117, Z77 ******I2a2a1 CTS616, CTS9183 *******I2a2a1a M284 ********I2a2a1a1 L1195 *********I2a2a1a1a L126/S165, L137/S166, L369 *********I2a2a1a1b L1193 *******I2a2a1b L701, L702 ********I2a2a1b1 P78 ********I2a2a1b2 L699, L703 *********I2a2a1b2a L704 *******I2a2a1c Z161 ********I2a2a1c1 L801/S390 *********I2a2a1c1a CTS1977 **********I2a2a1c1a1 P95 *********I2a2a1c1b CTS6433 **********I2a2a1c1b1 Z78 ***********I2a2a1c1b1a L1198 ************I2a2a1c1b1a1 Z190 *************I2a2a1c1b1a1a S434/Z79 ********I2a2a1c2 L623, L147.4 *******I2a2a1d L1229 ********I2a2a1d1 Z2054 *********I2a2a1d1a L812/S391 ********I2a2a1d2 L1230 ******I2a2a2 L1228 *****I2a2b L38/S154, L39/S155, L40/S156, L65.1/S159.1, L272.3 ******I2a2b1 L533 ***I2b L415, L416, L417 ***I2c L596/PF6907/S292, L597/S333 ''Note that the naming of some of the subgroups has changed, as new markers have been identified, and the sequence of mutations has become clearer.''

I-M170

The composite subclade I-M170 contains individuals directly descended from the earliest members of Haplogroup I, bearing none of the subsequent mutations which identify the remaining named subclades. Several I* individuals, who do not fall into any known subclades, have been found among the Lak people of

Dagestan Dagestan ( ; rus, Дагеста́н, , dəɡʲɪˈstan, links=yes), officially the Republic of Dagestan (russian: Респу́блика Дагеста́н, Respúblika Dagestán, links=no), is a republic of Russia situated in the North C ...

, at a rate of (3/21), as well as Turkey (8/741),

Adygea The Republic of Adygea (; russian: Республика Адыгея, Respublika Adygeya, p=ɐdɨˈɡʲejə; ady, Адыгэ Республик, ''Adıgə Respublik''), also known as the Adyghe Republic, is a republic of Russia. It is situated ...

in the Caucasus (2/138) and

Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...

(1/176), even though I-M170 occurs at only very low frequencies among modern populations of these regions as a whole. This is consistent with the belief that the haplogroup first appeared in South West Eurasia. There are also high frequencies of Haplogroup I* among the Andalusians (3/103),

French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...

(4/179), Slovenians (2/55),

Tabassarans Tabasarans are a Northeast Caucasian ethnic group native predominantly to southern part of the North Caucasian Republic of Dagestan. Their population in Russia is about 150,000. They speak the Tabasaran language. They are mainly Sunni Muslims. ...

(1/30), and

Saami The Sporting Arms and Ammunition Manufacturers' Institute (SAAMI, pronounced "Sammy") is an association of American manufacturers of firearms, ammunition, and components. SAAMI is an accredited standards developer that publishes several Americ ...

(1/35). (Neither study from which the above figures were drawn excluded the present I2-M438 clade as a whole, but only certain subclades, so these presumed cases I* may possibly belong to I2.) A living Hazara male from Afghanistan has also been found to carry I*, with all known subclades of both I1 (M253) and I2 (M438) ruled out.

I1-M253

Haplogroup I1-M253 (M253, M307, P30, P40) displays a very clear frequency gradient, with a peak frequency of approximately 35% among the populations of southern Norway, southwestern Sweden, and Denmark, and rapidly decreasing frequencies toward the edges of the historically Germanic-influenced world. A notable exception is Finland, where frequency in West Finns is up to 40%, and in certain provinces like Satakunta more than 50%. I1 is believed to have become common as a result of a founder effect during the Nordic Bronze Age, and subsequently spread throughout Europe during the

Migration Period The Migration Period was a period in European history marked by large-scale migrations that saw the fall of the Western Roman Empire and subsequent settlement of its former territories by various tribes, and the establishment of the post-Roman ...

when Germanic tribes migrated from southern

and northern

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

to other places in Europe. Outside

Fennoscandia __NOTOC__ Fennoscandia (Finnish language, Finnish, Swedish language, Swedish and no, Fennoskandia, nocat=1; russian: Фенноскандия, Fennoskandiya) or the Fennoscandian Peninsula is the geographical peninsula in Europe, which includes ...

, distribution of Haplogroup I1-M253 is closely correlated with that of Haplogroup I2a2-M436; but among Scandinavians (including both Germanic and Uralic peoples of the region) nearly all the Haplogroup I-M170 Y-chromosomes are I1-M253. Another characteristic of the Scandinavian I1-M253 Y-chromosomes is their rather low

haplotype A haplotype ( haploid genotype) is a group of alleles in an organism that are inherited together from a single parent. Many organisms contain genetic material ( DNA) which is inherited from two parents. Normally these organisms have their DNA or ...

diversity (STR diversity): a greater variety of Haplogroup I1-M253 Y-chromosomes has been found among the

and

Italians , flag = , flag_caption = The national flag of Italy , population = , regions = Italy 55,551,000 , region1 = Brazil , pop1 = 25–33 million , ref1 = , region2 ...

, despite the much lower overall frequency of Haplogroup I1-M253 among the modern French and Italian populations. This, along with the structure of the phylogenetic tree of I1-M253 strongly suggests that most living I1 males are the descendants of an initially small group of reproductively successful men who lived in Scandinavia during the Nordic Bronze Age.

I2-M438

Haplogroup I2-M438, previously I1b, may have originated in southern Europe – it is now found at its highest frequencies in the western

and

Sardinia Sardinia ( ; it, Sardegna, label=Italian, Corsican and Tabarchino ; sc, Sardigna , sdc, Sardhigna; french: Sardaigne; sdn, Saldigna; ca, Sardenya, label=Algherese and Catalan) is the second-largest island in the Mediterranean Sea, after ...

– some 15,000–17,000 years ago and developed into three main subgroups : I2-M438*, I2a-L460, I2b-L415 and I2c-L596.

I2a1a-M26

Haplogroup I2a1a-M26 is notable for its strong presence in Sardinia. Haplogroup I-M170 comprises approximately 40% of all patrilines among the Sardinians, and I2a1a-M26 is the predominant type of I among them. Haplogroup I2a1a-M26 is practically absent east of France and Italy, while it is found at low but significant frequencies outside of Sardinia in the

Balearic Islands The Balearic Islands ( es, Islas Baleares ; or ca, Illes Balears ) are an archipelago in the Balearic Sea, near the eastern coast of the Iberian Peninsula. The archipelago is an autonomous community and a province of Spain; its capital is ...

, Castile-León, the

Basque Country Basque Country may refer to: * Basque Country (autonomous community), as used in Spain ( es, País Vasco, link=no), also called , an Autonomous communities of Spain, autonomous community of Spain (shown in pink on the map) * French Basque Country o ...

, the

Pyrenees The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to C ...

, southern and western France, and parts of the

Maghreb The Maghreb (; ar, الْمَغْرِب, al-Maghrib, lit=the west), also known as the Arab Maghreb ( ar, المغرب العربي) and Northwest Africa, is the western part of North Africa and the Arab world. The region includes Algeria, ...

in North Africa, Great Britain, and Ireland. Haplogroup I2a1a-M26 appears to be the only subclade of Haplogroup I-M170 found among the

Basques The Basques ( or ; eu, euskaldunak ; es, vascos ; french: basques ) are a Southwestern European ethnic group, characterised by the Basque language, a common culture and shared genetic ancestry to the ancient Vascones and Aquitanians. Bas ...

, but appears to be found at somewhat higher frequencies among the general populations of Castile-León in Spain and

Béarn The Béarn (; ; oc, Bearn or ''Biarn''; eu, Bearno or ''Biarno''; or ''Bearnia'') is one of the traditional provinces of France, located in the Pyrenees mountains and in the plain at their feet, in southwest France. Along with the three Bas ...

in France than among the population of ethnic Basques. The M26 mutation is found in native males inhabiting every geographic region where megaliths may be found, including such far-flung and culturally disconnected regions as the Canary Islands, the Balearic Isles, Corsica, Ireland, and Sweden. The distribution of I2a1a-M26 also mirrors that of the Atlantic Bronze Age cultures, which indicates a potential spread via the

obsidian Obsidian () is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements s ...

trade or a regular maritime exchange of some of metallurgical products.

I2a1b-M423

The approximate frequency and variance of haplogroup I-P37 clusters in Eastern Europe

Haplogroup I2a1b-M423 is the most frequent Y-chromosome haplogroup I-M170 in Central and Eastern European populations, reaching its peak in the

Western Balkans The Balkans ( ), also known as the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throughout the whol ...

, most notably in

Dalmatia Dalmatia (; hr, Dalmacija ; it, Dalmazia; see #Name, names in other languages) is one of the four historical region, historical regions of Croatia, alongside Croatia proper, Slavonia, and Istria. Dalmatia is a narrow belt of the east shore of ...

(50–60%) and

Bosnia-Herzegovina Bosnia and Herzegovina ( sh, / , ), abbreviated BiH () or B&H, sometimes called Bosnia–Herzegovina and Pars pro toto#Geography, often known informally as Bosnia, is a country at the crossroads of Southern Europe, south and southeast Euro ...

(up to 71%, avg. 40-50%). Its subclade I-L161 has greater variance in Ireland and Great Britain, but overall frequency is very low (2–3%), while subclade I-L162 has the highest variance and also high concentration in Eastern Europe (Ukraine, Southeastern Poland, Belarus).

I2a2-M436

The distribution of Haplogroup I2a2-M436 (M436/P214/S33, P216/S30, P217/S23, P218/S32) is closely correlated to that of Haplogroup I1 except in

, which suggests that it was probably harbored by at least one of the Paleolithic refuge populations that also harbored Haplogroup I1-M253; the lack of correlation between the distributions of I1-M253 and I2a2-M436 in Fennoscandia may be a result of Haplogroup I2a2-M436's being more strongly affected in the earliest settlement of this region by

founder effect In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942, using ...

s and

genetic drift Genetic drift, also known as allelic drift or the Wright effect, is the change in the frequency of an existing gene variant (allele) in a population due to random chance. Genetic drift may cause gene variants to disappear completely and there ...

due to its rarity, as Haplogroup I2a2-M436 comprises less than 10% of the total Y-chromosome diversity of all populations outside of

Lower Saxony Lower Saxony (german: Niedersachsen ; nds, Neddersassen; stq, Läichsaksen) is a German state (') in northwestern Germany. It is the second-largest state by land area, with , and fourth-largest in population (8 million in 2021) among the 16 ...

. Haplogroup I2a2-M436 has been found in over 4% of the population only in Germany, the Netherlands, Belgium, Denmark, England (not including

Cornwall Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlantic ...

Scotland Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the ...

, and the southern tips of Sweden and Norway in Northwest Europe; the provinces of

Normandy Normandy (; french: link=no, Normandie ; nrf, Normaundie, Nouormandie ; from Old French , plural of ''Normant'', originally from the word for "northman" in several Scandinavian languages) is a geographical and cultural region in Northwestern ...

Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...

Anjou Anjou may refer to: Geography and titles France *County of Anjou, a historical county in France and predecessor of the Duchy of Anjou **Count of Anjou, title of nobility *Duchy of Anjou, a historical duchy and later a province of France **Duke ...

, and

Perche Perche () (French: ''le Perche'') is a former province of France, known historically for its forests and, for the past two centuries, for the Percheron draft horse breed. Until the French Revolution, Perche was bounded by four ancient territorie ...

in northwestern France; the province of

Provence Provence (, , , , ; oc, Provença or ''Prouvènço'' , ) is a geographical region and historical province of southeastern France, which extends from the left bank of the lower Rhône to the west to the Italian border to the east; it is bor ...

in southeastern France; the regions of

Tuscany Tuscany ( ; it, Toscana ) is a Regions of Italy, region in central Italy with an area of about and a population of about 3.8 million inhabitants. The regional capital is Florence (''Firenze''). Tuscany is known for its landscapes, history, art ...

Umbria it, Umbro (man) it, Umbra (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , ...

, and

Latium Latium ( , ; ) is the region of central western Italy in which the city of Rome was founded and grew to be the capital city of the Roman Empire. Definition Latium was originally a small triangle of fertile, volcanic soil (Old Latium) on whi ...

in Italy; and

Moldavia Moldavia ( ro, Moldova, or , literally "The Country of Moldavia"; in Romanian Cyrillic: or ; chu, Землѧ Молдавскаѧ; el, Ἡγεμονία τῆς Μολδαβίας) is a historical region and former principality in Centr ...

and the area around Russia's Ryazan Oblast and

Republic of Mordovia The Republic of Mordovia (russian: Респу́блика Мордо́вия, r=Respublika Mordoviya, p=rʲɪsˈpublʲɪkə mɐrˈdovʲɪjə; mdf, Мордовия Республиксь, ''Mordovija Respublikś''; myv, Мордовия Рес ...

in Eastern Europe. One subclade of Haplogroup I2a2-M436, namely I2a2a1a1-M284, has been found almost exclusively among the population of Great Britain, which has been taken to suggest that the clade may have a very long history in that island. It is notable, however, that the distributions of Haplogroup I1-M253 and Haplogroup I2a2-M436 seem to correlate fairly well with the extent of historical influence of

Germanic peoples The Germanic peoples were historical groups of people that once occupied Central Europe and Scandinavia during antiquity and into the early Middle Ages. Since the 19th century, they have traditionally been defined by the use of ancient and ear ...

. The punctual presence of both haplogroups at a low frequency in the area of the historical regions of

Bithynia Bithynia (; Koine Greek: , ''Bithynía'') was an ancient region, kingdom and Roman province in the northwest of Asia Minor (present-day Turkey), adjoining the Sea of Marmara, the Bosporus, and the Black Sea. It bordered Mysia to the southwest, Pa ...

and

Galatia Galatia (; grc, Γαλατία, ''Galatía'', "Gaul") was an ancient area in the highlands of central Anatolia, roughly corresponding to the provinces of Ankara and Eskişehir, in modern Turkey. Galatia was named after the Gauls from Thrace (c ...

in Turkey may be related to the

Varangian Guard The Varangian Guard ( el, Τάγμα τῶν Βαράγγων, ''Tágma tōn Varángōn'') was an elite unit of the Byzantine Army from the tenth to the fourteenth century who served as personal bodyguards to the Byzantine emperors. The Varangi ...

or rather suggests a connection with the ancient

Gauls The Gauls ( la, Galli; grc, Γαλάται, ''Galátai'') were a group of Celtic peoples of mainland Europe in the Iron Age and the Roman period (roughly 5th century BC to 5th century AD). Their homeland was known as Gaul (''Gallia''). They s ...

Thrace Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to t ...

, several tribes of which are recorded to have immigrated to those parts of Anatolia at the invitation of Nicomedes I of Bithynia. This suggestion is supported by recent genetic studies regarding Y-DNA Haplogroup I2b2-L38 have concluded that there was some Late Iron Age migration of Celtic La Tène people, through Belgium, to the British Isles including north-east Ireland. Haplogroup I2a2-M436 also occurs among approximately 1% of Sardinians, and in

Hazaras The Hazaras ( fa, , Həzārə; haz, , Āzərə) are an ethnic group and the principal component of the population of Afghanistan, native to, and primarily residing in the Hazaristan (Hazarajat) region in central Afghanistan and generally scatt ...

from Afghanistan at 3%.

Specifications of mutation

The technical details of U179 are: :Nucleotide change (rs2319818): G to A :Position (base pair): 275 :Total size (base pairs): 220 :Forward 5′→ 3′: :Reverse 5′→ 3′:

Height

This haplogroup reaches its maximum frequency in the Western Balkans (with the highest concentration of I2 in present-day

Herzegovina Herzegovina ( or ; sh-Latn-Cyrl, Hercegovina, separator=" / ", Херцеговина, ) is the southern and smaller of two main geographical region of Bosnia and Herzegovina, the other being Bosnia. It has never had strictly defined geogra ...

). It may be associated with unusually tall males, since those in the Dinaric Alps have been reported to be the tallest in the world, with an average male height of the range – in the cantons of

Bosnia Bosnia and Herzegovina ( sh, / , ), abbreviated BiH () or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country at the crossroads of south and southeast Europe, located in the Balkans. Bosnia and He ...

, in

Sarajevo Sarajevo ( ; cyrl, Сарајево, ; ''see Names of European cities in different languages (Q–T)#S, names in other languages'') is the Capital city, capital and largest city of Bosnia and Herzegovina, with a population of 275,524 in its a ...

, – in the cantons of

. A 2014 study examining the correlation between Y-DNA haplogroups and height found a correlation between the haplogroups I1, R1b-U106, I2a1b-M423 and tall males. The study featured the measured average heights of young German, Swedish, Dutch, Danish, Serbian and Bosnian men. The

German German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...

male average height was 180.2 cm, the

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

men were on average 181.4 cm, the Dutch men were 183.8 cm, the

Danish Danish may refer to: * Something of, from, or related to the country of Denmark People * A national or citizen of Denmark, also called a "Dane," see Demographics of Denmark * Culture of Denmark * Danish people or Danes, people with a Danish ance ...

men were 180.6 cm, the

Serbians The term Serbians in English is a polysemic word, with two distinctive meanings, derived from morphological differences: * Morphology 1: Serb-ian- s, derived from the noun ''Serb'' and used interchangeably to refer to ethnic Serbs, thus having ...

were 180.9 cm, and men from Herzegovina were 185.2 centimeters on average.

Notes

* *Bennett, E.A., Prat, S., Péan, S., Crépin, L., Yanevich, A., Puaud, S., ... & Geigl, E. M. (2019)
The origin of the Gravettians: genomic evidence from a 36,000-year-old Eastern European
BioRxiv, 685404. * *The Genographic Project, National Geographic

*ISOGG

References

External links

Phylogenetic tree and distribution maps

from the International Society of Genetic Genealogy (ISOGG)of 2013
Phylogeography of Y-Chromosome Haplogroup IFrequency Distributions of Y-DNA Haplogroup I and its subclades – with Video TutorialFrequency and Variance of I1b
(now considered I2a2-M26)
Map of 'I1a'
(now considered I-M253)
Map of 'I1b'
(now considered I2a-P37.2)
Map of 'I1c'
(now considered I2b-M223)
Rescalled Haplogroup I Tree (K. Nordtvedt 2011).

Projects

I Project at FTDNAI1 Project at FTDNAI2* Project at FTDNAI2a project at FTDNAI2b project at FTDNAI2b2 L38+ project at FTDNAThe Scandinavian yDNA Genealogical Project at FTDNAThe Finland Genealogical Project at FTDNA

Other

Study of Y-Haplogroup I and Modal HaplotypesThe Y Chromosome Consortium (YCC)
* ttp://members.bex.net/jtcullen515/haplotest.htm Haplo-I Subclade Predictorbr>Spread of Haplogroup I
from ''

National Geographic ''National Geographic'' (formerly the ''National Geographic Magazine'', sometimes branded as NAT GEO) is a popular American monthly magazine published by National Geographic Partners. Known for its photojournalism, it is one of the most widely ...

'' * I2b2 Y-DNA found in Bronze Age skeletons of Lichtenstein Cave
Haplogroup I-L38 (I2b2) ''In Search of the Origin of I-L38 (aka I2b2)''
{{DEFAULTSORT:Haplogroup I (Y-Dna) I