Y-DNA Haplogroup B and its Subclades - 2014

Because of continuing research, the structure of the Y-DNA Haplogroup Tree changes and ISOGG does its best to keep the tree updated with the latest developments in the field. The viewer may observe other versions of the tree on the Web. Email Alice Fairhurst if the differences need clarification or if you find any broken links on this page.

The criteria for a representative SNP printed in bold for a subclade is: traditional usage, testing one in multiple labs, and/or being found in the area of the chromosome used in recent research studies.

SNPs listed below in italics (colored black or red) are quality variants from next-generation sequencing reports consistently showing as representing that subgroup.

Contact Peoplefor Haplogroup B: Aaron R. Brown and Bonnie Schrack

Link to Experimental Composite Y-DNA Haplogroup B Tree by Ray Banks.

B   M60, M181/Page32
• B*   -
• B1   M236, M288
• • B1*   -
• • B1a   M146
• B2   M182, M247/P85, P90
• • B2*   -
• • B2a   M150, Page18
• • • B2a*   -
• • • B2a1   M218
• • • • B2a1*   -
• • • • B2a1a   M109, M152/Page60, P32, P50
• • • • B2a1b   G1
• • • B2a2   M108.1
• • • • B2a2*   -
• • • • B2a2a   M43, P111
• • B2b   M112
• • • B2b*   -
• • • B2b1   M192, 50f2(P)
• • • • B2b1*   -
• • • • B2b1a   P7_1, P7_2, P7_3
• • • • • B2b1a*   -
• • • • • B2b1a1   MSY2.1
• • • • • • B2b1a1*   -
• • • • • • B2b1a1a   M115, M169
• • • • • • B2b1a1b   M30, M129
• • • • • • • B2b1a1b*   -
• • • • • • • B2b1a1b1   M108.2
• • • • • • B2b1a1c   M211
• • • • • B2b1a2   P8_1, P8_2, P8_3, P70
• • • • B2b1b   P6
• • • B2b2   P112, V341
• B3   L1387, L1388, L1389, L1390, L1391, L1392, L1393, L1394, L1395, L1396, L1397

SNPs under Investigation - Additional testing is needed to confirm adequate positive samples and/or correct placement on the tree.

• V244 is located at approximately B-M60. Listed 8 March 2013.
• V85, V90, V94, V220, V234 and V237 are located at approximately B-M182. Listed 8 March 2013.
• V93 is located at approximately B-M150 and upstream from V75 and V197. Listed 8 March 2013.
• V78 is located at approximately downstream from B-M150 and upstream from B-V75 and B-V197. Listed 8 March 2013.
• V75 and V197 are located at approximately downstream from B-V78 but upstream from B-M218 and B-M108.1. Listed 8 March 2013.
• V62 and V227 are located at approximately downstream from B-M218 but upstream to B-V254 and B-M109. Listed 8 March 2013.
• V254 is located at approximately downstream from B-V62 and B-V227. Listed 8 March 2013.
• V84 and V217 are located at approximately at B-M109. Listed 8 March 2013.
• Page86 is located between M112 and M211. Listed 22 March 2013.
• Page72 is located at approximately B-M112. Listed 22 March 2013.

NOTES:

• Identical SNPs that were discovered separately are listed in alphabetical order, not necessarily in the order of discovery, and separated by "/". Examples: P257/U6, L31/S149.
• B-P50 is possibly a downstream subclade of B-M109 with equivalent subclade SNPs V83 and V185. Listed 8 March 2013.
• The position of G1 relative to V62 and V227 is uncertain. Listed 8 March 2013.

Y-DNA haplogroup B, like Y-DNA haplogroup A, is seen only in Africa and is scattered widely, but thinly across the continent. B is thought to have arisen approximately 50,000 years ago. These haplogroups have higher frequencies among hunter-gather groups in Ethiopia and Sudan, and are also seen among click language-speaking populations. The patchy, widespread distribution of these haplogroups may mean that they are remnants of ancient lineages that once had a much wider range but have been largely displaced by more recent population events.

Some geographic structuring is seen between the sub-groups B2a (B-M150) and B2b (B-M112). Sub-group B2b is seen among Central African Pygmies and South African Khoisan. Sub-group B2a is seen among Cameroonians, East Africans, and among South African Bantu speakers. B2a1a (B-M109) is the most commonly seen sub-group of B2a. About 2.3% of African-Americans belong to haplogroup B - with 1.5% of them belonging to the sub-group B2a1a.

References:

Batini et al, Signatures of the Preagricultural Peopling Processes in Sub-Saharan Africa as Revealed by the Phylogeography of Early Y Chromosome Lineages. (abstract) Molecular Biology and Evolution. 28 (9): 2603-2613, 2011.
Cruciani et al, A Back Migration from Asia to Sub-Saharan Africa Is Supported by High-Resolution Analysis of Human Y-Chromosome Haplotypes. American Journal of Human Genetics, 70:1197-1214, 2002.
Gomes et al, Digging Deeper into East African Human Y Chromosone Lineages, Human Genetics, 127(5):603-13, 2010.
Karafet et al, New Binary Polymorphisms Reshape and Increase Resolution of the Human Y-Chromosomal Haplogroup Tree. Abstract. Genome Research, published online April 2, 2008. Supplementary Material.
Regueiro et al, Iran: Tricontinental Nexus for Y-Chromosome Driven Migration. (abstract) Human Heredity, Vol. 61, No 3, 132-143, 2006.
Rozen et al, Remarkably Little Variation in Proteins Encoded by the Y Chromosome's Single-Copy Genes, Implying Effective Purifying Selection. American Journal of Human Genetics. 2009 December 11; 85(6): 923-928.
Schuster et al, Complete Khoisan and Bantu Genomes from Southern Africa. (abstract) Nature 463, 943-947, 18 February 2010.
Scozzari et al, Molecular Dissection of the Basal Clades in the Human Y Chromosome Phylogenetic Tree, PLoS ONE, Vol. 7, Issue 11, e4917, 2012.
Scozzari et al, An Unbiased Resource of Novel SNP Markers Provides a New Chronology for the Human Y Chromosome and Reveals a Deep Phylogenetic Structure in Africa, Genome Research, Vol. doi:10.1101/gr.160788.113, 2014.
Semino et al, Ethiopians and Khoisan Share the Deepest Clades of the Human Y-Chromosome Phylogeny. (pdf) American Journal of Human Genetics, 70:265-268, 2002.
Valone et al, Y SNP Typing of African-American and Caucasian Samples Using Allele-Specific Hybridization and Primer Extension. (pdf) Journal of Forensic Science, 49:4, July 2004.

Additional Resources:
ISOGG Wiki - What you need to know about Genetic Genealogy.
B Haplogroup Project .
The African DNA Project (B), Dr. Ana Oquendo Pabon.

Corrections/Additions made since 1 January 2014:

• Added L1387, L1388, L1389, L1390, L1391, L1392, L1393, L1394, L1395, L1396, L1397 to tree on 10 September 2014.
• Added Scozzari et al (2014) on 11 September 2014.
• Added Experimental Composite Y-DNA Haplogroup B Tree by Ray Banks on 15 November 2014.

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