Paragroup

Paragroup is a term used in population genetics to describe lineages within a haplogroup that are not defined by any additional unique markers.

In human Y-chromosome DNA haplogroups, paragroups are typically represented by an asterisk (*) placed after the main haplogroup.[1] The term "paragroup" is a portmanteau of the terms paraphyletic haplogroup indicating that paragroups form paraphyletic subclades.[1] Apart from the mutations that define the parent haplogroup, paragroups may not possess any additional unique markers. Alternatively pargroups may possess unique markers that have not been discovered. If a unique marker is discovered within a paragroup, the specific lineage is given a unique name and is moved out of the paragroup to form an independent subclade.

For example, the paragroup of human Y-DNA Haplogroup DE is DE*. A member of DE* has the marker that defines DE, but not the markers that define DE's only known immediate subclades, haplogroups D and E.[2] Likewise, haplogroup E1b1b1g (also known as E-M293) is an example of a relatively new subclade, discovered within a previously designated paragroup and assigned a new name. Until the SNP/UEP marker M293 was discovered in 2008, the members of the subclade were indistinguishable from other components of the paragroup E1b1b1* (also known as E3b* and E-M35*).[3]

Another example is a member of the Y-DNA haplogroup R (defined by marker M207) may belong to the sub-haplogroup R1 (defined by marker M173) or R2 (defined by marker M124). Individuals with neither of these mutations would be categorised as belonging to group R*.a bclade

References

  1. 1 2 The Y Chromosome Consortium, T. Y. C. (2002). "A Nomenclature System for the Tree of Human Y-Chromosomal Binary Haplogroups" (PDF). Genome Research (Cold Spring Harbor Laboratory Press) 12 (2): 339–48. doi:10.1101/gr.217602. PMC: 155271. PMID 11827954.
  2. Weale, Michael E.; et al. (2003). "Rare Deep-Rooting Y Chromosome Lineages in Humans: Lessons for Phylogeography". Genetics 165 (1): 229–34. PMC: 1462739. PMID 14504230.
  3. Henn, BM; et al. (2008). "Y-chromosomal evidence of a pastoralist migration through Tanzania to southern Africa". Proceedings of the National Academy of Sciences of the United States of America (PNAS) 105 (31): 10693–8. doi:10.1073/pnas.0801184105. PMC: 2504844. PMID 18678889.

Evolutionary tree of human mitochondrial DNA (mtDNA) haplogroups

  Mitochondrial Eve (L)    
L0 L1–6
L1 L2 L3   L4 L5 L6
  M   N  
CZ D E G Q   O A S   R   I W X Y
C Z B F R0   pre-JT P  U
HV JT K
H V J T


Evolutionary tree of human Y-chromosome DNA haplogroups [χ 1][χ 2]
"Y-chromosomal Adam"
A00 A0-T [χ 3]
A0 A1[χ 4]
A1a A1b
A1b1 BT
B CT
DE CF
D E C F
F1 F2 F3 GHIJK
G HIJK
H IJK
IJ K
I J LT [χ 5]  K2
L T NO [χ 6] K2b [χ 7]   K2c K2d K2e [χ 8]
N O K2b1 [χ 9]    P
M S [χ 10] Q R
  1. Van Oven M, Van Geystelen A, Kayser M, Decorte R, Larmuseau HD (2014). "Seeing the wood for the trees: a minimal reference phylogeny for the human Y chromosome". Human Mutation 35 (2): 187–91. doi:10.1002/humu.22468. PMID 24166809.
  2. International Society of Genetic Genealogy (ISOGG; 2015), Y-DNA Haplogroup Tree 2015. (Access date: 1 February 2015.)
  3. Haplogroup A0-T is also known as A0'1'2'3'4.
  4. Haplogroup A1 is also known as A1'2'3'4.
  5. Haplogroup LT (L298/P326) is also known as Haplogroup K1.
  6. Haplogroup NO (M214) is also known as Haplogroup K2a (although the present Haplogroup K2e was also previously known as "K2a").
  7. Haplogroup K2b (M1221/P331/PF5911) is also known as Haplogroup MPS.
  8. Haplogroup K2e (K-M147) was previously known as "Haplogroup X" and "K2a" (but is a sibling subclade of the present K2a, also known as Haplogroup NO).
  9. Haplogroup K2b1 (P397/P399) is similar to the former Haplogroup MS, but has a broader and more complex internal structure.
  10. Haplogroup S (S-M230) was previously known as Haplogroup K5.
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