Haplogroup R1a is one of the major classifications (called clades) of Y-chromosome types found in human male lines. It is widespread all across Eurasia. Many sample studies therefore carry information on the incidence of R1a and/or its subclassifications, in particular the dominant branching line represented by the haplogroups R1a1 and R1a1a.
The table below collates information from a number of such sample studies, with incidence frequencies in sample data reported as percentages, along with the associated sample sizes.
Al-Zahery, N.; Semino, O.; Benuzzi, G.; Magri, C.; Passarino, G.; Torroni, A.; Santachiara-Benerecetti, A.S. (September 2003). "Y-chromosome and mtDNA polymorphisms in Iraq, a crossroad of the early human dispersal and of post-Neolithic migrations". Molecular Phylogenetics and Evolution. 28 (3): 458–472. doi:10.1016/s1055-7903(03)00039-3. PMID12927131.
Balanovsky, Oleg; Rootsi, Siiri; Pshenichnov, Andrey; Kivisild, Toomas; Churnosov, Michail; Evseeva, Irina; Pocheshkhova, Elvira; Boldyreva, Margarita; et al. (2008), "Two Sources of the Russian Patrilineal Heritage in Their Eurasian Context", American Journal of Human Genetics, 82 (1): 236–250, doi:10.1016/j.ajhg.2007.09.019, PMC2253976, PMID18179905
Bamshad; Kivisild, T; Watkins, WS; Dixon, ME; Ricker, CE; Rao, BB; Naidu, JM; Prasad, BV; et al. (2001), "Genetic evidence on the origins of Indian caste populations", Genome Research, vol. 11, no. 6, pp. 994–1004, doi:10.1101/gr.GR-1733RR, PMC311057, PMID11381027.
Battaglia, V.; Fornarino, Simona; Al-Zahery, Nadia; Olivieri, Anna; Pala, Maria; Myres, Natalie M; King, Roy J; Rootsi, Siiri; et al. (2008), "Y-chromosomal evidence of the cultural diffusion of agriculture in southeast Europe", European Journal of Human Genetics, 17 (6): 820–830, doi:10.1038/ejhg.2008.249, PMC2947100, PMID19107149
Bowden; Balaresque, P.; King, T. E.; Hansen, Z.; Lee, A. C.; Pergl-Wilson, G.; Hurley, E.; Roberts, S. J.; et al. (2008), "Excavating Past Population Structures by Surname-Based Sampling: The Genetic Legacy of the Vikings in Northwest England", Molecular Biology and Evolution, 25 (2): 301–309, doi:10.1093/molbev/msm255, PMC2628767, PMID18032405
Capelli, Cristian; Redhead, Nicola; Abernethy, Julia K.; Gratrix, Fiona; Wilson, James F.; Moen, Torolf; Hervig, Tor; Richards, Martin; Stumpf, Michael P.H.; Underhill, Peter A.; Bradshaw, Paul; Shaha, Alom; Thomas, Mark G.; Bradman, Neal; Goldstein, David B. (May 2003). "A Y Chromosome Census of the British Isles"(PDF). Current Biology. 13 (11): 979–984. doi:10.1016/s0960-9822(03)00373-7. PMID12781138. S2CID526263.
Cinnioğlu, Cengiz; King, Roy; Kivisild, Toomas; Kalfoglu, Ersi; Atasoy, Sevil; Cavalleri, Gianpiero L.; Lillie, Anita S.; Roseman, Charles C.; Lin, Alice A.; Prince, Kristina; Oefner, Peter J.; Shen, Peidong; Semino, Ornella; Cavalli-Sforza, L. Luca; Underhill, Peter A. (2004), "Excavating Y-chromosome haplotype strata in Anatolia", Hum Genet, 114 (2): 127–48, doi:10.1007/s00439-003-1031-4, PMID14586639, S2CID10763736
Cordaux; Aunger, Robert; Bentley, Gillian; Nasidze, Ivane; Sirajuddin, S.M.; Stoneking, Mark (2004), "Independent Origins of Indian Caste and Tribal Paternal Lineages", Current Biology, 14 (3): 231–235, doi:10.1016/j.cub.2004.01.024, PMID14761656, S2CID5721248
Ennafaa, Hajer; Fregel, Rosa; Khodjet-el-khil, Houssein; Gonzalez, Ana M; Mahmoudi, Hejer Abdallah El; Cabrera, Vicente M; Larruga, José M; Benammar-Elgaaïed, Amel (2011), "Mitochondrial DNA and Y-chromosome microstructure in Tunisia", Journal of Human Genetics, 56 (10): 734–41, doi:10.1038/jhg.2011.92, PMID21833004
Firasat; Khaliq, Shagufta; Mohyuddin, Aisha; Papaioannou, Myrto; Tyler-Smith, Chris; Underhill, Peter A; Ayub, Qasim (2007), "Y-chromosomal evidence for a limited Greek contribution to the Pathan population of Pakistan", European Journal of Human Genetics, 15 (1): 121–126, doi:10.1038/sj.ejhg.5201726, PMC2588664, PMID17047675
Fornarino; Pala, Maria; Battaglia, Vincenza; Maranta, Ramona; Achilli, Alessandro; Modiano, Guido; Torroni, Antonio; Semino, Ornella; Santachiara-Benerecetti, Silvana A (2009), "Mitochondrial and Y-chromosome diversity of the Tharus (Nepal): a reservoir of genetic variation", BMC Evolutionary Biology, 9 (1): 154, Bibcode:2009BMCEE...9..154F, doi:10.1186/1471-2148-9-154, PMC2720951, PMID19573232
Helgason; Sigurðardóttir, Sigrún; Nicholson, Jayne; Sykes, Bryan; Hill, Emmeline W.; Bradley, Daniel G.; Bosnes, Vidar; Gulcher, Jeffery R.; et al. (2000), "Estimating Scandinavian and Gaelic Ancestry in the Male Settlers of Iceland", American Journal of Human Genetics, 67 (3): 697–717, doi:10.1086/303046, PMC1287529, PMID10931763
Kasperavičiūtė, D.; Kučinskas, V.; Stoneking, M. (September 2004). "Y Chromosome and Mitochondrial DNA Variation in Lithuanians: Y Chomosome and mtDNA Variation in Lithuanians". Annals of Human Genetics. 68 (5): 438–452. doi:10.1046/j.1529-8817.2003.00119.x. PMID15469421. S2CID26562505.
Kharkov, V. N.; Stepanov, V. A.; Borinskaya, S. A.; Kozhekbaeva, Zh. M.; Gusar, V. A.; Grechanina, E. Ya.; Puzyrev, V. P.; Khusnutdinova, E. K.; Yankovsky, N. K. (March 2004). "Gene Pool Structure of Eastern Ukrainians as Inferred from the Y-Chromosome Haplogroups". Russian Journal of Genetics. 40 (3): 326–331. doi:10.1023/B:RUGE.0000021635.80528.2f. S2CID25907265.
Kharkov, V. N.; Stepanov, V. A.; Feshchenko, S. P.; Borinskaya, S. A.; Yankovsky, N. K.; Puzyrev, V. P. (August 2005). "Frequencies of Y Chromosome Binary Haplogroups in Belarussians". Russian Journal of Genetics. 41 (8): 928–931. doi:10.1007/s11177-005-0182-x. PMID16161635. S2CID1357824.
Kharkov, V. N.; Stepanov, V. A.; Medvedeva, O. F.; Spiridonova, M. G.; Voevoda, M. I.; Tadinova, V. N.; Puzyrev, V. P. (May 2007). "Gene pool differences between Northern and Southern Altaians inferred from the data on Y-chromosomal haplogroups". Russian Journal of Genetics. 43 (5): 551–562. doi:10.1134/S1022795407050110. S2CID566825.
King, R. J.; Özcan, S. S.; Carter, T.; Kalfoğlu, E.; Atasoy, S.; Triantaphyllidis, C.; Kouvatsi, A.; Lin, A. A.; Chow, C-E. T.; Zhivotovsky, L. A.; Michalodimitrakis, M.; Underhill, P. A. (March 2008). "Differential Y-chromosome Anatolian Influences on the Greek and Cretan Neolithic". Annals of Human Genetics. 72 (2): 205–214. doi:10.1111/j.1469-1809.2007.00414.x. PMID18269686. S2CID22406638.
Kivisild; Rootsi, S.; Metspalu, M.; Mastana, S.; Kaldma, K.; Parik, J.; Metspalu, E.; Adojaan, M.; Tolk, H.-V.; Stepanov, V.; Gölge, M.; Usanga, E.; Papiha, S.S.; Cinnioğlu, C.; King, R.; Cavalli-Sforza, L.; Underhill, P.A.; Villems, R. (2003), "The Genetic Heritage of the Earliest Settlers Persists Both in Indian Tribal and Caste Populations", AJHG, vol. 72, no. 2, pp. 313–32, doi:10.1086/346068, PMC379225, PMID12536373.
Kivisild, Toomas; Rootsi, Siiri; Metspalu, Mait; Metspalu, Ene; Parik, Juri; Kaldma, Katrin; Usanga, Esien; Mastana, Sarabjit; Papiha, Surinder S.; Villems, Richard (2002). "The Genetics of Language and Farming Spread in India". In Bellwood, Peter S.; Renfrew, Colin (eds.). Examining the Farming/language Dispersal Hypothesis. McDonald Institute for Archaeological Research, University of Cambridge. pp. 215–222. CiteSeerX10.1.1.408.6337. ISBN978-1-902937-20-5.
Luca, F.; Di Giacomo, F.; Benincasa, T.; Popa, L.O.; Banyko, J.; Kracmarova, A.; Malaspina, P.; Novelletto, A.; Brdicka, R. (January 2007). "Y-chromosomal variation in the Czech Republic". American Journal of Physical Anthropology. 132 (1): 132–139. doi:10.1002/ajpa.20500. hdl:2108/35058. PMID17078035.
Malaspina; et al. (2003), Analysis of Y-chromosome variation in modern populations at the European-Asian border(PDF), pp. 309–313, archived from the original(PDF) on 2023-06-24, retrieved 2009-10-22 in K. Boyle, C. Renfrew, and M. Levine, eds. Ancient interactions: east and west in Eurasia. McDonald Institute for Archaeological Research Monograph Series, Cambridge University Press, Cambridge
Marjanovic, D.; Fornarino, S.; Montagna, S.; Primorac, D.; Hadziselimovic, R.; Vidovic, S.; Pojskic, N.; Battaglia, V.; Achilli, A.; Drobnic, K.; Andjelinovic, S.; Torroni, A.; Santachiara-Benerecetti, A. S.; Semino, O. (November 2005). "The Peopling of Modern Bosnia-Herzegovina: Y-chromosome Haplogroups in the Three Main Ethnic Groups". Annals of Human Genetics. 69 (6): 757–763. doi:10.1111/j.1529-8817.2005.00190.x. PMID16266413. S2CID36632274.
Mirabal; Regueiro, Maria; Cadenas, Alicia M; Cavalli-Sforza, L Luca; Underhill, Peter A; Verbenko, Dmitry A; Limborska, Svetlana A; Herrera, Rene J (2009), "Y-Chromosome distribution within the geo-linguistic landscape of northwestern Russia", European Journal of Human Genetics, 17 (10): 1260–1273, doi:10.1038/ejhg.2009.6, PMC2986641, PMID19259129
Mukherjee; Nebel, Almut; Oppenheim, Ariella; Majumder, Partha P. (2001), "High-resolution analysis of Y-chromosomal polymorphisms reveals signatures of population movements from central Asia and West Asia into India", Journal of Genetics, vol. 80, no. 3 (published December 2001), pp. 125–135, doi:10.1007/BF02717908, PMID11988631, S2CID13267463.
Francalacci, P.; Morelli, L.; Angius, A.; Berutti, R.; Reinier, F.; Atzeni, R.; Pilu, R.; Busonero, F.; Maschio, A.; Zara, I.; Sanna, D.; Useli, A.; Urru, M. F.; Marcelli, M.; Cusano, R.; Oppo, M.; Zoledziewska, M.; Pitzalis, M.; Deidda, F.; Porcu, E.; Poddie, F.; Kang, H. M.; Lyons, R.; Tarrier, B.; Gresham, J. B.; Li, B.; Tofanelli, S.; Alonso, S.; Dei, M.; Lai, S.; Mulas, A.; Whalen, M. B.; Uzzau, S.; Jones, C.; Schlessinger, D.; Abecasis, G. R.; Sanna, S.; Sidore, C.; Cucca, F. (2 August 2013). "Low-Pass DNA Sequencing of 1200 Sardinians Reconstructs European Y-Chromosome Phylogeny". Science. 341 (6145): 565–569. Bibcode:2013Sci...341..565F. doi:10.1126/science.1237947. PMC5500864. PMID23908240.
Nasidze, Ivan; Quinque, Dominique; Ozturk, Murat; Bendukidze, Nina; Stoneking, Mark (July 2005). "MtDNA and Y-chromosome Variation in Kurdish Groups: MtDNA and Y-chromosome Variation in Kurdish Groups". Annals of Human Genetics. 69 (4): 401–412. doi:10.1046/j.1529-8817.2005.00174.x. PMID15996169. S2CID23771698.
Passarino; Semino, Ornella; Magri, Chiara; Al-Zahery, Nadia; Benuzzi, Giorgia; Quintana-Murci, Lluis; Andellnovic, Slmun; Bullc-Jakus, Floriana; Liu, Aiping; Arslan, Ahmet; Santachiara-Benerecetti, A.Silvana (2001), "The 49a,f haplotype 11 is a new marker of the EU19 lineage that traces migrations from northern regions of the black sea", Hum. Immunol., vol. 62, no. 9, pp. 922–932, doi:10.1016/S0198-8859(01)00291-9, PMID11543894.
Passarino; Cavalleri, Gianpiero L; Lin, Alice A; Cavalli-Sforza, Luigi Luca; Børresen-Dale, Anne-Lise; Underhill, Peter A (2002), "Different genetic components in the Norwegian population revealed by the analysis of mtDNA and Y chromosome polymorphisms", European Journal of Human Genetics, vol. 10, no. 9, pp. 521–9, doi:10.1038/sj.ejhg.5200834, PMID12173029.
Pericic; Lauc, LB; Klarić, IM; Rootsi, S; Janićijevic, B; Rudan, I; Terzić, R; Colak, I; et al. (2005), "High-resolution phylogenetic analysis of southeastern Europe traces major episodes of paternal gene flow among Slavic populations", Mol. Biol. Evol., vol. 22, no. 10, pp. 1964–75, doi:10.1093/molbev/msi185, PMID15944443.
Qamar; Ayub, Qasim; Mohyuddin, Aisha; Helgason, Agnar; Mazhar, Kehkashan; Mansoor, Atika; Zerjal, Tatiana; Tyler-Smith, Chris; Mehdi, S. Qasim (2002), "Y-Chromosomal DNA Variation in Pakistan", American Journal of Human Genetics, 70 (5): 1107–1124, doi:10.1086/339929, PMC447589, PMID11898125
Quintana-Murci; Krausz, C; Zerjal, T; Sayar, SH; Hammer, MF; Mehdi, SQ; Ayub, Q; Qamar, R; et al. (2001), "Y-chromosome lineages trace diffusion of people and languages in southwestern Asia", American Journal of Human Genetics, 68 (2): 537–542, doi:10.1086/318200, PMC1235289, PMID11133362
Rosser, Zoë H.; Zerjal, Tatiana; Hurles, Matthew E.; Adojaan, Maarja; Alavantic, Dragan; Amorim, António; Amos, William; Armenteros, Manuel; Arroyo, Eduardo; Barbujani, Guido; Beckman, Gunhild; Beckman, Lars; Bertranpetit, Jaume; Bosch, Elena; Bradley, Daniel G.; Brede, Gaute; Cooper, Gillian; Côrte-Real, Helena B.S.M.; de Knijff, Peter; Decorte, Ronny; Dubrova, Yuri E.; Evgrafov, Oleg; Gilissen, Anja; Glisic, Sanja; Gölge, Mukaddes; Hill, Emmeline W.; Jeziorowska, Anna; Kalaydjieva, Luba; Kayser, Manfred; Kivisild, Toomas; Kravchenko, Sergey A.; Krumina, Astrida; Kučinskas, Vaidutis; Lavinha, João; Livshits, Ludmila A.; Malaspina, Patrizia; Maria, Syrrou; McElreavey, Ken; Meitinger, Thomas A.; Mikelsaar, Aavo-Valdur; Mitchell, R. John; Nafa, Khedoudja; Nicholson, Jayne; Nørby, Søren; Pandya, Arpita; Parik, Jüri; Patsalis, Philippos C.; Pereira, Luísa; Peterlin, Borut; Pielberg, Gerli; Prata, Maria João; Previderé, Carlo; Roewer, Lutz; Rootsi, Siiri; Rubinsztein, D.C.; Saillard, Juliette; Santos, Fabrício R.; Stefanescu, Gheorghe; Sykes, Bryan C.; Tolun, Aslihan; Villems, Richard; Tyler-Smith, Chris; Jobling, Mark A. (December 2000). "Y-Chromosomal Diversity in Europe Is Clinal and Influenced Primarily by Geography, Rather than by Language". The American Journal of Human Genetics. 67 (6): 1526–1543. doi:10.1086/316890. PMC1287948. PMID11078479.
Saha; Sharma, Swarkar; Bhat, Audesh; Pandit, Awadesh; Bamezai, Ramesh (2005), "Genetic affinity among five different population groups in India reflecting a Y-chromosome gene flow", Journal of Human Genetics, vol. 50, no. 1, pp. 49–51, doi:10.1007/s10038-004-0219-3, PMID15611834.
Sahoo, S.; Singh, A; Himabindu, G; Banerjee, J; Sitalaximi, T; Gaikwad, S; Trivedi, R; Endicott, P; et al. (2006), "A prehistory of Indian Y chromosomes: Evaluating demic diffusion scenarios", Proceedings of the National Academy of Sciences, 103 (4): 843–848, Bibcode:2006PNAS..103..843S, doi:10.1073/pnas.0507714103, PMC1347984, PMID16415161
Sanchez; Børsting, C; Hallenberg, C; Buchard, A; Hernandez, A; Morling, N (2003), "Multiplex PCR and minisequencing of SNPs—a model with 35 Y chromosome SNPs", Forensic Sci Int, 137 (1): 74–84, doi:10.1016/S0379-0738(03)00299-8, PMID14550618
Semino, O.; Passarino, G; Oefner, PJ; Lin, AA; Arbuzova, S; Beckman, LE; De Benedictis, G; Francalacci, P; Kouvatsi, A; Limborska, S; Marcikiae, M; Mika, A; Mika, B; Primorac, D; Santachiara-Benerecetti, AS; Cavalli-Sforza, LL; Underhill, PA (10 November 2000). "The Genetic Legacy of Paleolithic Homo sapiens sapiens in Extant Europeans: A Y Chromosome Perspective". Science. 290 (5494): 1155–1159. Bibcode:2000Sci...290.1155S. doi:10.1126/science.290.5494.1155. PMID11073453.
Sengupta; Zhivotovsky, Lev A.; King, Roy; Mehdi, S.Q.; Edmonds, Christopher A.; Chow, Cheryl-Emiliane T.; Lin, Alice A.; Mitra, Mitashree; et al. (2005), "Polarity and Temporality of High-Resolution Y-Chromosome Distributions in India Identify Both Indigenous and Exogenous Expansions and Reveal Minor Genetic Influence of Central Asian Pastoralists", American Journal of Human Genetics, vol. 78, no. 2, pp. 202–21, doi:10.1086/499411, PMC1380230, PMID16400607.
Sharma, Swarkar; Rai, Ekta; Sharma, Prithviraj; Jena, Mamata; Singh, Shweta; Darvishi, Katayoon; Bhat, Audesh K; Bhanwer, A J S; et al. (2009), "The Indian origin of paternal haplogroup R1a1(*)substantiates the autochthonous origin of Brahmins and the caste system", Journal of Human Genetics, 54 (1): 47–55, doi:10.1038/jhg.2008.2, PMID19158816
Tambets, Kristiina; Rootsi, Siiri; Kivisild, Toomas; Help, Hela; Serk, Piia; Loogväli, Eva-Liis; Tolk, Helle-Viivi; Reidla, Maere; Metspalu, Ene; Pliss, Liana; Balanovsky, Oleg; Pshenichnov, Andrey; Balanovska, Elena; Gubina, Marina; Zhadanov, Sergey; Osipova, Ludmila; Damba, Larisa; Voevoda, Mikhail; Kutuev, Ildus; Bermisheva, Marina; Khusnutdinova, Elza; Gusar, Vladislava; Grechanina, Elena; Parik, Jüri; Pennarun, Erwan; Richard, Christelle; Chaventre, Andre; Moisan, Jean-Paul; Barać, Lovorka; Peričić, Marijana; Rudan, Pavao; Terzić, Rifat; Mikerezi, Ilia; Krumina, Astrida; Baumanis, Viesturs; Koziel, Slawomir; Rickards, Olga; De Stefano, Gian Franco; Anagnou, Nicholas; Pappa, Kalliopi I.; Michalodimitrakis, Emmanuel; Ferák, Vladimir; Füredi, Sandor; Komel, Radovan; Beckman, Lars; Villems, Richard (April 2004). "The Western and Eastern Roots of the Saami—the Story of Genetic 'Outliers' Told by Mitochondrial DNA and Y Chromosomes". The American Journal of Human Genetics. 74 (4): 661–682. doi:10.1086/383203. PMC1181943. PMID15024688.
Underhill, P.A.; Myres, Natalie M; Rootsi, Siiri; Metspalu, Mait; Zhivotovsky, Lev A; King, Roy J; Lin, Alice A; Chow, Cheryl-Emiliane T; et al. (2009), "Separating the post-Glacial coancestry of European and Asian Y chromosomes within haplogroup R1a", European Journal of Human Genetics, 18 (4): 479–484, doi:10.1038/ejhg.2009.194, PMC2987245, PMID19888303
Völgyi; Zalán, Andrea; Szvetnik, Enikő; Pamjav, Horolma (2008), "Hungarian population data for 11 Y-STR and 49 Y-SNP markers", Forensic Science International: Genetics, 3 (2): e27 –e28, doi:10.1016/j.fsigen.2008.04.006, PMID19215861
Wang (2003), "The origins and genetic structure of three co-resident Chinese Muslim populations: the Salar, Bo'an and Dongxiang", Human Genetics, 113 (3): 244–52, doi:10.1007/s00439-003-0948-y, PMID12759817, S2CID11138499
Weale, Michael E.; Yepiskoposyan, Levon; Jager, Rolf F.; Hovhannisyan, Nelli; Khudoyan, Armine; Burbage-Hall, Oliver; Bradman, Neil; Thomas, Mark G. (December 2001). "Armenian Y chromosome haplotypes reveal strong regional structure within a single ethno-national group". Human Genetics. 109 (6): 659–674. doi:10.1007/s00439-001-0627-9. PMID11810279. S2CID23113666.
Weale; Weiss, DA; Jager, RF; Bradman, N; Thomas, MG (2002), "Y Chromosome Evidence for Anglo-Saxon Mass Migration", Mol. Biol. Evol., vol. 19, no. 7, pp. 1008–1021, doi:10.1093/oxfordjournals.molbev.a004160, PMID12082121.
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Wilson; Weiss, DA; Richards, M; Thomas, MG; Bradman, N; Goldstein, DB; et al. (2001), "Genetic evidence for different male and female roles during cultural transitions in the British Isles", Proc. Natl. Acad. Sci. U.S.A., 98 (9): 5078–5083, Bibcode:2001PNAS...98.5078W, doi:10.1073/pnas.071036898, PMC33166, PMID11287634
Zerjal; Beckman, L; Beckman, G; Mikelsaar, AV; Krumina, A; Kucinskas, V; Hurles, ME; Tyler-Smith, C; et al. (2001), "Geographical, linguistic, and cultural influences on genetic diversity: Y-chromosomal distribution in Northern European populations", Mol Biol Evol, 18 (6): 1077–1087, doi:10.1093/oxfordjournals.molbev.a003879, PMID11371596
Zerjal, Tatiana; Wells, R. Spencer; Yuldasheva, Nadira; Ruzibakiev, Ruslan; Tyler-Smith, Chris; et al. (2002), "A Genetic Landscape Reshaped by Recent Events: Y-Chromosomal Insights into Central Asia", American Journal of Human Genetics, 71 (3): 466–482, doi:10.1086/342096, PMC419996, PMID12145751
Zhou, Ruixia; An, Lizhe; Wang, Xunling; Shao, Wei; Lin, Gonghua; Yu, Weiping; Yi, Lin; Xu, Shijian; Xu, Jiujin; Xie, Xiaodong (2007), "Testing the hypothesis of an ancient Roman soldier origin of the Liqian people in northwest China: a Y-chromosome perspective", Journal of Human Genetics, 52 (7): 584–91, doi:10.1007/s10038-007-0155-0, PMID17579807
Zhao; Khan, Faisal; Borkar, Minal; Herrera, Rene; Agrawal, Suraksha (2009), "Presence of three different paternal lineages among North Indians: A study of 560 Y chromosomes", Annals of Human Biology, 36 (1): 1–14, doi:10.1080/03014460802558522, PMC2755252, PMID19058044