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Haplogroup A is a human Y-chromosome DNA haplogroup, which includes all living human Y chromosomes. Bearers of extant sub-clades of haplogroup A are almost exclusively found in Africa, in contrast with haplogroup BT, bearers of which participated in the Out of Africa migration of early modern humans. The known branches of haplogroup A are A00, A0, A1a, and A1b1; these branches are only very distantly related, and are not more closely related to each other than they are to haplogroup BT.
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Haplogroup E-P2, also known as E1b1, is a human Y-chromosome DNA haplogroup. E-P2 has two basal branches, E-V38 and E-M215. E-P2 had an ancient presence in East Africa and the Levant; presently, it is primarily distributed in Africa where it may have originated, and occurs at lower frequencies in the Middle East and Europe.
E-Z827, also known as E1b1b1b, is a major human Y-chromosome DNA haplogroup. It is the parent lineage to the E-Z830 and E-V257 subclades, and defines their common phylogeny. The former is predominantly found in the Middle East; the latter is most frequently observed in North Africa, with its E-M81 subclade observed among the ancient Guanche natives of the Canary Islands. E-Z827 is also found at lower frequencies in Europe, and in isolated parts of Southeast Africa.
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Haplogroup E-M2, also known as E1b1a1-M2, is a human Y-chromosome DNA haplogroup. E-M2 is primarily distributed within sub-Saharan Africa. More specifically, E-M2 is the predominant subclade in West Africa, Central Africa, Southern Africa, and the region of the African Great Lakes; it also occurs at low to moderate frequencies in North Africa, and at low frequencies in the Middle East. E-M2 has several subclades, but many of these subhaplogroups are included in either E-L485 or E-U175. E-M2 is especially common among indigenous Africans who speak Niger-Congo languages, and was spread to Southern Africa and East Africa through the Bantu expansion.
The human Y-chromosome haplogroup E-V12 is a subclade of E-M78, which in turn is part of the larger haplogroup E1b1b1. According to Cruciani et al. (2007), the E-V12 sublineage likely originated in Northern Africa. It has two main branches: E-V32 which is most common in the Horn of Africa, and E-CTS693 which is most common in Upper Egypt and to a lesser extent in Sudan. E-CTS693 is also scattered in low frequencies across the Levant, Anatolia, the Central Sahel, the African Great Lakes region, and Europe.
The genetic history of Africa is composed of the overall genetic history of African populations in Africa, including the regional genetic histories of North Africa, West Africa, East Africa, Central Africa, and Southern Africa, as well as the recent origin of modern humans in Africa. The Sahara served as a trans-regional passageway and place of dwelling for people in Africa during various humid phases and periods throughout the history of Africa.
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- ↑ Moran CN et al 2004, Y chromosome haplogroups of elite Ethiopian endurance runners.
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- ↑ Rita Gonçalves, Hélder Spínola & António Brehm (2010) Y-chromosome lineages in São Tomé e Príncipe and Cabo Verde islands: Different input of European influence. Forensic Science International: Genetics Supplement Series, Volume 1, Issue 1, August 2008, Pages 210-211
- ↑ Sánchez, Juan J et al 2005, High frequencies of Y chromosome lineages characterized by E3b1, DYS19-11, DYS392-12 in Somali males
- 1 2 3 Pereira, Luísa; Černý, Viktor; Cerezo, María; Silva, Nuno M; Hájek, Martin; Vašíková, Alžběta; Kujanová, Martina; Brdička, Radim; Salas, Antonio (August 2010). "Linking the sub-Saharan and West Eurasian gene pools: maternal and paternal heritage of the Tuareg nomads from the African Sahel". European Journal of Human Genetics. 18 (8): 915–923. doi:10.1038/ejhg.2010.21. ISSN 1018-4813. PMC 2987384 . PMID 20234393.
- ↑ International HapMap Consortium, 2005, "A haplotype map of the human genome", Nature, no. 437 (27 October), pp. 1299-1320.