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Archiver > GENEALOGY-DNA > 2005-05 > 1114963820


From: "Dennis Garvey" <>
Subject: YCC haplogroup G1
Date: Sun, 01 May 2005 09:10:20 -0700
In-Reply-To: <200504301704.j3UH48UZ011677@lists5.rootsweb.com>


Brian Hamman and I exchanged a couple of emails on Friday concerning the
stats given for haplogroup G1 on his haplogroup G webpage:

http://www.brian-hamman.com/ModalsForG.htm

Brian said he made the assumption that the GxG2 in Behar's paper were G1.
That's what accounts for a large portion of the N=79 shown in his table for
G1. He said this seemed a reasonable assumption since the Behar GxG2
haplotypes resembled those given for G1 in the 2004 Anatolia paper by
Cinnioglu et al and in the 2002 20 YSTR Megaplex paper by Butler et al.

I'm not sure that we can assume that the GxG2's seen in 7.7% of Ashkenazi
Jews in Behar's study are G1 (G-P20). For one thing, Hammer's group
discovered P20 (the marker that defines G1), so it seems that they would
have included it in the Behar study if it was seen among that significant of
a fraction of Ashkenazi Jews.

I am only aware of six examples of G1 in published studies: Cinnioglu et al
saw four examples of G1a (G-P20) and one G1* (G-M285/342). Another example
is YCC sample #79 (the 20 STR haplotype is given in the Butler paper). It
may just be happenstance that YCC #79 was also from Turkey - or it may be
that the range of haplogroup G1 is confined to that region.

I think it's more likely that the GxG2 group seen by Behar et al among
Ashkenazi Jews can only be defined as G* (G-M201*) with the presently known
set of YSNPs. Keep in mind that this doesn't mean that the group has any
fewer SNPs than anyone else - it just means that no member of that group has
ever been included among those re-sequenced in a systematic search for new
YSNPs.

Dennis Garvey
___________________________________________________________
Y-Chromosome Haplogroup Website

http://freepages.genealogy.rootsweb.com/~dgarvey/DNA/markers.htm
___________________________________________________________


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