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Archiver > GENEALOGY-DNA > 2007-08 > 1187099122


From: "William Hurst" <>
Subject: Re: [DNA] Mtdna haplogroup R*
Date: Tue, 14 Aug 2007 09:45:22 -0400
In-Reply-To: <000301c7de76$42318fc0$4001a8c0@IanLogan>


Hi Ian, Gary, Valery and all,

>The point to make is that there is no specific SNP that shows B - it is
>really a matter of
>exclusion of the other haplogroups.
>
>All B's do normally have the deletion at 8281-8289; and this is usually
>taken to show Haplogroup B.
>But I do not think FTDNA are testing for this deletion.
>However one has to be careful as this deletion occurs in many haplogroups;
>and can also be a bit
>variable.
>
>Ian

If you look at the recent Genographic Project paper, Figure 4 shows the
decision tree with the 22 SNPs used by the Project and FTDNA to define mtDNA
haplogroups:
http://genetics.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pgen.0030104
The SNP for Hg B is shown as 8280, which is later referred to as the "9-bp
deletion at 8280." However, FTDNA does show the deletions as being from 8281
to 8289. Dr. Behar shows these in his K tree in his 2006 Ashkenazi paper as
"9bpD" under a branch of K1b1b and also in a single sequence between K1a1
and K1a9. The latter sequence, with a couple of fixes, is fairly common in K
members at FTDNA and is what I have given the provisional name K1a11. I'm
sure they could look at the additional SNPs for U and K to determine the
difference between B and K.

Bill Hurst


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