See also
Y-DNA R-M207 subclades
Y-DNA backbone tree
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Footnotes
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| Haplogroup R2a | |
|---|---|
| Possible time of origin | 14,700 [95% CI 13,200 <-> 16,100] years before present [1] |
| Coalescence age | 11,900 [95% CI 10,500 <-> 13,400] years before present [1] |
| Possible place of origin | South Asia [ citation needed ] |
| Ancestor | R-M479 |
| Descendants | R-M124*, R-L295, R-L263, R-L1069 |
| Defining mutations | M124, P249, P267, L266 [2] [3] |
Haplogroup R2a, or haplogroup R-M124, is a Y-chromosome haplogroup characterized by genetic markers M124, P249, P267, L266, and is mainly found in South Asia as well as in Central Asia, Caucasus, Southwest Asia, and the Arab countries with low frequencies.
Haplogroup R2a is also known as haplogroup R-M124. [2] The first reference to the newly defined haplogroup, "R-M124", was on 25 August 2010. [4]
Before the publication of the 2005 Y-Chromosome Phylogenetic Tree, Haplogroup R-M124 was known as Haplogroup P1 and formerly thought to be a sister clade of Haplogroup R rather than derived from it. [5]
Haplogroup R2 most often observed in Asia, especially on the Indian sub-continent and Central Asia. [5] It is also reported at notable frequencies in Caucasus.
According to Sengupta et al. (2006),
uncertainty neutralizes previous conclusions that the intrusion of HGs R1a1 and R2 [Now R-M124] from the northwest in Dravidian-speaking southern tribes is attributable to a single recent event. Rather, these HGs contain considerable demographic complexity, as implied by their high haplotype diversity. Specifically, they could have actually arrived in southern India from a southwestern Asian source region multiple times, with some episodes considerably earlier than others.
| Haplogroup R‑M124 |
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Paragroup is a term used in population genetics to describe lineages within a haplogroup that are not defined by any additional unique markers. They are typically represented by an asterisk (*) placed after the main haplogroup.
Y-chromosomes which are positive to the M124, P249, P267, and L266 SNPs and negative to the L295, L263, and L1069 SNPs, are categorized as belonging to Paragroup R-M124*. It is found in Iraq, so far.
Haplogroup R-L295 is a Y-chromosome haplogroup characterized by genetic marker L295. It is found in South Asia, Anatolia, Arabian Peninsula, Europe, & Central Asia so far.
Haplogroup R-L263 is a Y-chromosome haplogroup characterized by genetic marker L263. It is found in Greek Asia Minor & Armenia so far. [6]
Haplogroup R-L1069 is a Y-chromosome haplogroup characterized by genetic marker L1069. It is found in Kuwait so far. [6]
R-M124 is most often observed in Asia, especially on the Indian sub-continent and in Central Asia [5] It is also reported at notable frequencies in Caucasus.
Ancient samples of haplogroup R2a were observed in the remains of humans from Neolithic, Chalcolithic and Bronze Age Iran and Turan; and Iron Age South Asia. R2a was also recovered from excavated remains in the South Asian sites of Saidu Sharif and Butkara from a later period. [7]
| Tibeto-Burman | Austro-Asiatic | Dravidian | Indo-European | |
|---|---|---|---|---|
| Tribe | 5.75% | 10.94% | 5.00% | - |
| Lower Caste | - | - | 13.79% | 10.00% |
| Middle Caste | - | - | 3.53% | 18.75% |
| Upper Caste | - | - | 10.17% | 16.28% |
Haplogroup R-M124, along with haplogroups H, L, R1a1, and J2, forms the majority of the South Asian male population. The frequency is around 10-15% in India and Sri Lanka and 7-8% in Pakistan. Its spread within South Asia is very extensive, ranging from Baluchistan in the west to Bengal in the east; Hunza in the north to Sri Lanka in the south.
Among regional groups, it is found among West Bengalis (23%), New Delhi Hindus (20%), Punjabis (5%) and Gujaratis (3%). [8] Among tribal groups, Karmalis of West Bengal showed highest at 100% (16/16) [9] followed by Lodhas (43%) [10] to the east, while Bhil of Gujarat in the west were at 18%, [11] Tharus of north showed it at 17%, [12] Chenchu and Pallan of south were at 20% and 14% respectively. [9] [13] Among caste groups, high percentages are shown by Jaunpur Kshatriyas (87%), Kamma Chaudhary (73%), Bihar Yadav (50%), Khandayat (46%)and Kallar (44%). [9]
It is also significantly high in many Brahmin groups including Punjabi Brahmins (25%), Bengali Brahmins (22%), Konkanastha Brahmins (20%), Chaturvedis (32%), Bhargavas (32%), Kashmiri Pandits (14%) and Lingayat Brahmins (30%). [11] [14] [12] [9]
North Indian Muslims have a frequency of 19% (Sunni) and 13% (Shia), [14] while Dawoodi Bohra Muslim in the western state of Gujarat have a frequency of 16% and Mappila Muslims of South India have a frequency of 5%. [15]
The R2 haplogroup in the northern regions of Pakistan is found among Burusho people (14%), Pashtuns (10%) and Hazaras (4%). [16] [13]
In southern regions, it is found among Balochis (12%), Brahuis (12%) and Sindhi (5%). [13]
The R2-M124 haplogroup occurs at a considerably higher rate in the northern regions of Afghanistan (11.4%). [17] Although the true percentage remains debated, the haplogroup is known to be at elevated levels in the Pamiri population (number ranges from 6-17% depending on the group). One study on Nuristanis shows a 20% frequency of R2 (1/5), albeit with a small sample size. [18]
38% of the Sinhalese of Sri Lanka were found to be R2 positive according to a 2003 research. [8]
In Kazakh tribes it varies from 1% to 12%, however it is found at a higher percent at about 25% among Tore Tribe / Genghis Khans descendant tribe. [19]
In Central Asia, Tajikistan shows Haplogroup R-M124 at 6%, while the other '-stan' states vary around 2%. Bartangis of Tajikistan have a high frequency of R-M124 at about 17%, Ishkashimi at 8%, Khojant at 9% and Dushanbe at 6%.
Specifically, Haplogroup R-M124 has been found in approximately 7.5% (4/53) of recent Iranian emigrants living in Samarkand, [20] 7.1% (7/99) of Pamiris, [20] 6.8% (3/44) of Karakalpaks, [20] 5.1% (4/78) of Tajiks, [20] 5% (2/40) of Dungans in Kyrgyzstan, [20] 3.3% (1/30) of Turkmens, [20] 2.2% (8/366) of Uzbeks, [20] and 1.9% (1/54) of Kazakhs. [20]
A 2011 genetic study found R-M124 in 6.7% of Han Chinese from western Henan, 3.4% of Han Chinese from Gansu and 2.1% to 4.2% of Uyghurs from Xinjiang. [21]
In a 2014 paper, R-M124 has been detected in 0.9% (1/110) of Han Chinese samples from China. The sample belonged to an individual from Jilin province. [22]
The haplogroup R-M124 frequency of 6.1% (6/114) was found among overall Kurds [23] while in one study which was done with 25 samples of Kurmanji Kurds from Georgia, R-M124 has been observed at 44% (11/25) [24]
In Caucasus high frequency was observed in Armenians from Sason at 17% (18/104) [25] while it was observed at %1 in Armenians from Van. R2 has been found in Chechens at 16%. [26] R-M124 has been found in approximately 8% (2/24) of a sample of Ossetians from Alagir. [27]
In the Caucasus, around 16% of Mountain Jews, 8% of Balkarians, [28] 6% of Kalmyks, [29] 3% of Azerbaijanis, [26] 2.6% of Kumyks, [30] 2.4% of Avars, [30] 2% of Armenians, [26] and 1% to 6% of Georgians [26] [28] [31] belong to the R-M124 haplogroup. Approximately 1% of Turks [32] and 1% to 3% of Iranians [33] also belong to this haplogroup.
In Iran R-M124 follows a similar distribution as R1a1 with higher percentages in the southeastern Iran. It has been found at Frequencies of 9.1% at Isfahan, 6.9% at Hormozgan and 4.2% in Mazandaran. [34]
| Count | Sample Size | R-M124 Frequency % | |
|---|---|---|---|
| UAE [35] | 8 | 217 | 3.69% |
| Qatar [36] | 1 | 72 | 1.39% |
| Kuwait [37] | 1 | 153 | 0.65% |
| Yemen [36] | 1 | 104 | 0.96% |
| Jordan [38] | 2 | 146 | 1.37% |
| Lebanon [39] | 2 | 935 | 0.21% |
| Palestine [40] | 1 | 49 | 2.04% |
| Egypt [41] | 1 | 147 | 0.68% |
In the R2-M124-WTY and R-Arabia Y-DNA Projects, [6] [42] Haplogroup R-M124 has appeared in the following Arab countries: Kuwait (3 clusters), United Arab Emirates (1 cluster), Syrian Arab Republic (1 cluster), and Tunisia (1 cluster).
Thus, Haplogroup R-M124 has been observed among Arabs at low frequencies in 11 countries/territories (Egypt, Jordan, Kuwait, Lebanon, Palestine, Qatar, Syria, Tunisia, United Arab Emirates, and Yemen) of the 22 Arab countries/territories so far. In the Kingdom of Saudi Arabia so far has one family identified to have Haplogroup R2A (R-M124) of its paternal genome or Y-Chromosome updated 5 January; 2018.
Haplogroup R-M124 is a subgroup of Haplogroup R-M479 (M479):
Haplotype can be used to predict haplogroup. The chances of any person part of this haplogroup is the highest if DYS391=10, DYS392=10 and DYS426=12.
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Footnotes
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Genetics and archaeogenetics of South Asia is the study of the genetics and archaeogenetics of the ethnic groups of South Asia. It aims at uncovering these groups' genetic histories. The geographic position of the Indian subcontinent makes its biodiversity important for the study of the early dispersal of anatomically modern humans across Asia.
In human genetics, Haplogroup J-M172 or J2 is a Y-chromosome haplogroup which is a subclade (branch) of haplogroup J-M304. Haplogroup J-M172 is common in modern populations in Western Asia, Central Asia, South Asia, Southern Europe, Northwestern Iran and North Africa. It is thought that J-M172 may have originated between the Caucasus, Anatolia and/or Western Iran.
Haplogroup E-M96 is a human Y-chromosome DNA haplogroup. It is one of the two main branches of the older and ancestral haplogroup DE, the other main branch being haplogroup D. The E-M96 clade is divided into two main subclades: the more common E-P147, and the less common E-M75.
Haplogroup H (Y-DNA), also known as H-L901/M2939 is a Y-chromosome haplogroup.
Haplogroup L-M20 is a human Y-DNA haplogroup, which is defined by SNPs M11, M20, M61 and M185. As a secondary descendant of haplogroup K and a primary branch of haplogroup LT, haplogroup L currently has the alternative phylogenetic name of K1a, and is a sibling of haplogroup T.
Haplogroup P also known as P-F5850 or K2b2 is a Y-chromosome DNA haplogroup in human genetics. P-F5850 is a branch of K2b, which is a branch of Haplogroup K2 (K-M526).
Haplogroup Q or Q-M242 is a Y-chromosome DNA haplogroup. It has one primary subclade, Haplogroup Q1 (L232/S432), which includes numerous subclades that have been sampled and identified in males among modern populations.
Haplogroup R1, or R-M173, is a Y-chromosome DNA haplogroup. A primary subclade of Haplogroup R (R-M207), it is defined by the SNP M173. The other primary subclade of Haplogroup R is Haplogroup R2 (R-M479).
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. Many people within a haplogroup share similar numbers of short tandem repeats (STRs) and types of mutations called single-nucleotide polymorphisms (SNPs).
Haplogroup R, or R-M207, is a Y-chromosome DNA haplogroup. It is both numerous and widespread amongst modern populations.
The Burusho, or Brusho, also known as the Botraj, are an ethnolinguistic group indigenous to the Yasin, Hunza, Nagar, and other valleys of Gilgit–Baltistan in northern Pakistan, with a tiny minority of around 350 Burusho people residing in Jammu and Kashmir, India. Their language, Burushaski, has been classified as a language isolate.
The various ethnolinguistic groups found in the Caucasus, Central Asia, Europe, the Middle East, North Africa and/or South Asia demonstrate differing rates of particular Y-DNA haplogroups.
Haplogroup R1a, or haplogroup R-M420, is a human Y-chromosome DNA haplogroup which is distributed in a large region in Eurasia, extending from Scandinavia and Central Europe to Central Asia, southern Siberia and South Asia.
Haplogroup E-M132, formerly known as E-M33 (E1a), is a human Y-chromosome DNA haplogroup. Along with E-P177, it is one of the two main branches of the older E-P147 paternal clade. E-M132 is divided into two primary sub-branches, E-M44 and E-Z958, with many descendant subclades.
Genetic studies on the Sinhalese is part of population genetics investigating the origins of the Sinhalese population.
Haplogroup R2, or R-M479, is a Y-chromosome haplogroup characterized by genetic marker M479. It is one of two primary descendants of Haplogroup R (R-M207), the other being R1 (R-M173).
Y-DNA haplogroups in populations of Europe are haplogroups of the male Y-chromosome found in European populations.
Listed here are notable ethnic groups and populations from Western Asia, Egypt and South Caucasus by human Y-chromosome DNA haplogroups based on relevant studies. The samples are taken from individuals identified with the ethnic and linguistic designations in the first two columns, the third column gives the sample size studied, and the other columns give the percentage of the particular haplogroup. Some old studies conducted in the early 2000s regarded several haplogroups as one haplogroup, e.g. I, G and sometimes J were haplogroup 2, so conversion sometimes may lead to unsubstantial frequencies below.
Y-DNA haplogroups in populations of South Asia are haplogroups of the male Y-chromosome found in South Asian populations.
Haplogroup R-L295 also known as R2a1 is a Y-chromosome haplogroup characterized by genetic marker L295, which has been found in South Asia, Anatolia, Arabian Peninsula, Europe and Central Asia.
