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Archiver > DNA-R1B1C7 > 2008-03 > 1206193737


From: "David Wilson" <>
Subject: [DNA-R1B1C7] Possible Link between R1b1c7 and R1b1c10 -- new SNPunder investigation
Date: Sat, 22 Mar 2008 06:48:57 -0700


A Y-chromosome SNP identified as rs34276300 may unite the R1b1c7 and R1b1c10
folk, as well as some R1b1c*, within the broader R1b1c population. This SNP
is one of hundreds tested by deCODEme, an Icelandic genetic testing firm. A
handful of genetic genealogists have ordered this test, and the initial
results suggest that it may reveal a useful marker to divide the R1b1c
population into major subgroups.

R1b1c9 individuals and an individual from Haplogroup G, much higher in the
Y-DNA tree, share the C allele at this locus. R1b1c10 and R1b1c7 individuals
share the A allele. This suggests that C is the ancestral value and A the
derived value, but with so few tests in hand it is barely possible that A is
the ancestral value and that C appears through independent mutations in two
different branches of the tree.

In general, there are no clear STR values that would have made us think
R1b1c7 individuals are more closely related to R1b1c10 than anybody else in
the R1b1c group. This is definitely going to be an interesting research
project to watch. Thomas Krahn at FTDNA has already begun to set up a small
study to investigate the distribution of these alleles in individuals from
different haplogroups.

R1b1c10 correlates strongly with European regions with strong Celtic
associations, and R1b1c9 correlates with Germanic regions of Europe. But
both are found in European zones away from the places where German and
Celtic tribes were dominant (not to mention in the British Isles, too), so
we must be careful about linking the labels to geographical areas too
literally.

Understanding this new SNP won't tell R1b1c7 people anything about family
genealogy in the last thousand years, but it may help clarify the earlier
history of the branch.

David Wilson

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