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Archiver > GENEALOGY-DNA > 2008-09 > 1222141637


From: "Roberta J. Estes" <>
Subject: Re: [DNA] D9S1120/D9S919 Autosomal marker and Melungeon ancestry
Date: Mon, 22 Sep 2008 23:47:17 -0400
References: <ea3bd9560809222031i5e5b99b1w812c644545a4cf4d@mail.gmail.com>
In-Reply-To: <ea3bd9560809222031i5e5b99b1w812c644545a4cf4d@mail.gmail.com>


Hi David,

Actually, a number of folks in the Melungeon group have already ordered the
test and to date, no other 19/20. However, it's far from 100% that everyone
has ordered that test. Ironically, the man with the 19/20 is my cousin:)
But I don't have 19/20 or 9/10.

Roberta

-----Original Message-----
From:
[mailto:] On Behalf Of David Faux
Sent: Monday, September 22, 2008 11:31 PM
To: genealogy-dna
Subject: [DNA] D9S1120/D9S919 Autosomal marker and Melungeon ancestry

List:

I made a number of posts recently about the Schroeder et al. (2007) article
illustrating the link between Native American populations and the 9 repeat
variant (9RA) for D9S1120/D9S919 on chromosome 9.


http://archiver.rootsweb.ancestry.com/th/read/GENEALOGY-DNA/2008-09/12206858
00



http://archiver.rootsweb.ancestry.com/th/read/GENEALOGY-DNA/2008-09/12207194
62



http://archiver.rootsweb.ancestry.com/th/read/GENEALOGY-DNA/2008-09/12208429
40



http://archiver.rootsweb.ancestry.com/th/read/GENEALOGY-DNA/2008-09/12214400
36

I noted that it is possible that the 19/20 repeat variant also has
geographical structure, constructong a google map to show the specifics.
Also I refered interested individuals to a study by Hellenthal et al. (2008)
that might support the premise that this variantion could have emerged in
the foothills of the Himalayas and moved in a straight line across northern
East Asia to the territory of the Yakuts and across Beringia. I have
approached the author of the 2007 paper about this observation and the link
to Native North American groups. She will be publishing another paper very
soon which should shed further light on the matter.

To date the only person who has reported having a 19/20 repeat score has
identified a Melungeon ancestry from VA and TN (e.g., surnames Collins,
Gibson). It is possible that through genetic drift that this variant is
found at a relatively high frequency in the mixed ancestry groups of the
Eastern Seaboard and Appalachians. Hopefully people of this ancestry will
be willing to invest the small fee via FTDNA in order to obtain results for
this autosomal marker. Hopefully anyone of possible Native American
ancestry will consider the investment to determine whether there is a 19/20
repeat allele, or 9/10 which at this point do not seem to be found in those
with both parents of European ancestry - but as of this writing that is far
from sure.

Once FTDNA is back to their normal routines I can request whether they have
data on the percentage of each allele variant for this marker - and any
associated geographical info.

David K. Faux.

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