DNA-R1B1C7-L Archives

From: "David Wilson" <>
Subject: [DNA-R1B1C7] R1b1c7 Statistics
Date: Fri, 1 Jun 2007 23:56:46 -0700

FTDNA currently reports that they have nearly 100,000 Y-DNA records in their
data base. Most R1b1c7 individuals who have their preferences set to show
matches in the entire data base will find that about 500-540 matches are
reported to them at the 25-marker level. (This will necessarily include
matches with all 12-marker haplotypes, and the tightness of the R1b1c7
cluster will guarantee that even at the 22/25 match level almost all of the
reported matches are themselves R1b1c7.)

R1b1c7 haplotypes thus account for roughly 0.5 percent of the FTDNA data
base. Since the dominant R1b1c haplogroup of which R1b1c7 is a subclade
appears to account for about a quarter to a third of the data base,
arithmetic tells us that the R1b1c7 population amounts to roughly 1.5 to 2.0
percent of its parent clade within the FTDNA collection of haplotypes.

But the FTDNA data base is heavily skewed towards populations from the
British Isles. If more balanced representation from Europe could be
achieved, the proportion of R1b1c7 would decline significantly -- almost
certainly to less than one percent of the total R1b1c population. Within the
British Isles R1b1c7 penetration is unlikely to exceed three percent of the
entire population, though the Trinity College Dublin study published in late
2005 found isolated concentrations (Donegal would be an example) at the 20
percent level.

In no major political division in Northern Ireland or Lowland Scotland has
R1b1c7 been observed to constitute a majority of the population. Even where
most concentrated, it is a minority haplotype.

David Wilson

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• [DNA-R1B1C7] R1b1c7 Statistics by "David Wilson" <>