Haplogroup L1 Explained

L1
Origin-Date:107,600–174,300 YBP[1]
Origin-Place:Central Africa
Ancestor:L1-6
Descendants:L1b, L1c
Mutations:3666, 7055, 7389, 13789, 14178, 14560[2]

Haplogroup L1 is a human mitochondrial DNA (mtDNA) haplogroup. It is most common in Central Africa and West Africa.It diverged from L1-6 at about 140,000 years ago (95% CI).[3] Its emergence is associated with the early peopling of Africa by anatomically modern humans during the Eemian, and it is now mostly found in Central African foragers.

Ancient DNA

Among the less than 1% of subgroups of macro-haplogroup L found among the population in Europe, haplogroup L1b is present; haplogroup L1b in Europe, which is often found in West Africa, has been dated to 10,000 BP.[4]

Distribution

Haplogroup L1 is found most commonly in Central Africa and West Africa. It reaches its highest frequency among the Mbenga people.It is likely that it was formerly more widespread, and was constrained to its current area as a result of the Bantu migration (which is largely associated with haplogroup L2).[5] Haplogroup L1 has been observed in specimens from the island cemetery in Kulubnarti, Sudan, which date from the Early Christian period (AD 550–800).[6] An ancient Beaker culture individual at the Camino de las Yeseras in Spain (San Fernando de Henares, Madrid; [I4245 / RISE695] F) has also been found to carry the L1b1a mitochondrial haplogroup.[7]

Subclades

L1c

L1c emerged at about 85 kya. It reaches its highest frequencies in West and Central Africa, notably among the Mbenga people.[8] (See map.) Among the Mbenga, it is carried by 100% of Ba-Kola, 97% of Ba-Benzélé, and 77% of Biaka.[9] Other populations in which L1c is particularly prevalent include the Bedzan (Tikar) people (100%), Baka people from Gabon (97%) and Cameroon (90%),[10] the Bakoya (97%), and the Ba-Bongo (82%).[8] Common also in São Tomé (20%) and Angola (16–24%).[11]

L1b

L1b is much more recent, dated at about 10 kya. It is frequent in West Africa. It has also been found in Mozambique (1%), Ethiopia (2%), Egypt (1%), the Nile Valley (4%), Kung (1%), Cape Verde (8%), Senegal (17–20%), Niger/Nigeria (15%), Guinea Bissau (11%), Morocco (4–5%), and Algeria (1–2%).[12]

Phylogenetics

L1 has two branches, L1c and L1b (the formerly named haplogroups L1d, L1k, L1a, L1f have been re-classified into haplogroup L0, as L0d, L0k, L0a, L0f; L1e as L5).

Phylogeny of L1c:

Phylogeny of L1b:

See also

External links

Notes and References

  1. Supplemental Data Correcting for Purifying Selection: An Improved Human Mitochondrial Molecular Clock. The American Journal of Human Genetics. 4 Jun 2009. Pedro. Soares . Luca Ermini . Noel Thomson . Maru Mormina . Teresa Rito . Arne Röhl . Antonio Salas . Stephen Oppenheimer . Vincent Macaulay . Martin B. Richards. 84. 6. 82–93. 10.1016/j.ajhg.2009.05.001. 19500773. 2694979.
  2. Updated comprehensive phylogenetic tree of global human mitochondrial DNA variation. Human Mutation. 13 Oct 2008. Mannis. van Oven. Manfred Kayser. 30. 2. E386–E394. 10.1002/humu.20921. 18853457 . 27566749. free.
  3. Correcting for Purifying Selection: An Improved Human Mitochondrial Molecular Clock Supplementary material . American Journal of Human Genetics . 82 . 2009. https://web.archive.org/web/20091229152305/http://download.cell.com/AJHG/mmcs/journals/0002-9297/PIIS0002929709001633.mmc1.pdf. 2009-12-29.
  4. Borbély . Noémi . Phylogenetic insights into the genetic legacies of Hungarian‑speaking communities in the Carpathian Basin . Scientific Reports . 2024 . 14 . 11480 . 10.1038/s41598-024-61978-4 . 38769390 . 2045-2322 . 11106325 . 10243951083 . 2024NatSR..1411480B . 269928158.
  5. Silva . Marina . Alshamali . Farida . Silva . Paula . Carrilho . Carla . Mandlate . Flávio . Jesus Trovoada . Maria . Černý . Viktor . Pereira . Luísa . Soares . Pedro . 2015 . 60,000 years of interactions between Central and Eastern Africa documented by major African mitochondrial haplogroup L2 . Sci. Rep. . 5 . 12526 . 10.1038/srep12526 . 26211407 . 4515592 . 2015NatSR...512526S .
  6. Sirak, Kendra . Frenandes, Daniel . Novak, Mario . Van Gerven, Dennis . Pinhasi, Ron. Abstract Book of the IUAES Inter-Congress 2016 - A community divided? Revealing the community genome(s) of Medieval Kulubnarti using next- generation sequencing. Abstract Book of the Iuaes Inter-Congress 2016 . 2016. 115 . IUAES.
  7. Iñigo Olalde et al. The Beaker Phenomenon And The Genomic Transformation Of Northwest Europe, 2017
  8. Quintana-Murci . etal . 2008 . Maternal traces of deep common ancestry and asymmetric gene flow between Pygmy hunter–gatherers and Bantu-speaking farmers . Proceedings of the National Academy of Sciences of the United States of America . 105 . 5. 1596–601. 2234190 . 18216239 . 10.1073/pnas.0711467105 . 2008PNAS..105.1596Q . free .
  9. Sarah A. Tishkoff et al. 2007, History of Click-Speaking Populations of Africa Inferred from mtDNA and Y Chromosome Genetic Variation. Molecular Biology and Evolution 2007 24(10):2180-2195
  10. Lluis Quintana-Murci et al. MtDNA diversity in Central Africa: from hunter-gathering to agriculturalism. CNRS-Institut Pasteur, Paris
  11. Batini, Chiara et al 2006, Phylogeography of the human mitochondrial L1c haplogroup: Genetic signatures of the prehistory of Central Africa
  12. Rosa, Alexandra. etal. MtDNA profile of West Africa Guineans: towards a better understanding of the Senegambia region. Annals of Human Genetics. 2004. 68. 4. 340–52. 5 June 2017. 10.1046/j.1529-8817.2004.00100.x. 15225159. 15391342. 10400.13/3044. free.

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