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 paragroups 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 haplogroup R*.
References
- ^ a b The Y Chromosome Consortium, T. Y. C. (2002). "A Nomenclature System for the Tree of Human Y-Chromosomal Binary Haplogroups" (PDF). Genome Research. 12 (2). Cold Spring Harbor Laboratory Press: 339–48. doi:10.1101/gr.217602. PMC 155271. PMID 11827954.
- ^ Weale, Michael E.; et al. (2003). "Rare Deep-Rooting Y Chromosome Lineages in Humans: Lessons for Phylogeography". Genetics. 165 (1): 229–34. doi:10.1093/genetics/165.1.229. PMC 1462739. PMID 14504230.
- ^ 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. 105 (31). PNAS: 10693–8. Bibcode:2008PNAS..10510693H. doi:10.1073/pnas.0801184105. PMC 2504844. PMID 18678889.
Phylogenetic 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 |
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- e
- ^ 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. S2CID 23291764.
- ^ International Society of Genetic Genealogy (ISOGG; 2015), Y-DNA Haplogroup Tree 2015. (Access date: 1 February 2015.)
- ^ Haplogroup A0-T is also known as A-L1085 (and previously as A0'1'2'3'4).
- ^ Haplogroup A1 is also known as A1'2'3'4.
- ^ F-Y27277, sometimes known as F2'4, is both the parent clade of F2 and F4 and a child of F-M89.
- ^ Haplogroup LT (L298/P326) is also known as Haplogroup K1.
- ^ Between 2002 and 2008, Haplogroup T-M184 was known as "Haplogroup K2". That name has since been re-assigned to K-M526, the sibling of Haplogroup LT.
- ^ Haplogroup K2b (M1221/P331/PF5911) is also known as Haplogroup MPS.
- ^ Haplogroup K2b1 (P397/P399) is also known as Haplogroup MS, but has a broader and more complex internal structure.
- ^ Haplogroup P (P295) is also klnown as K2b2.
- ^ K-M2313*, which as yet has no phylogenetic name, has been documented in two living individuals, who have ethnic ties to India and South East Asia. In addition, K-Y28299, which appears to be a primary branch of K-M2313, has been found in three living individuals from India. See: Poznik op. cit.; YFull YTree v5.08, 2017, "K-M2335", and; PhyloTree, 2017, "Details of the Y-SNP markers included in the minimal Y tree" (Access date of these pages: 9 December 2017)
- ^ Haplogroup S, as of 2017, is also known as K2b1a. (Previously the name Haplogroup S was assigned to K2b1a4.)
- ^ Haplogroup M, as of 2017, is also known as K2b1b. (Previously the name Haplogroup M was assigned to K2b1d.)