DNA-R1B1C7-L Archives

Archiver > DNA-R1B1C7 > 2007-08 > 1186711529


From: "J. David Grierson" <>
Subject: Re: [DNA-R1B1C7] R1b1c7 in Scotland
Date: Fri, 10 Aug 2007 12:05:29 +1000
References: <c22.1b24a807.33ed15f0@aol.com>
In-Reply-To: <c22.1b24a807.33ed15f0@aol.com>


Maybe I have missed a discussion about the value of CDYa, and I guess we
can expect modals to evolve as more tests are done. However, what is the
current view - is CDYa in the R1b1c7 modal 38 as shown in FTDNA
(YSearch), or 37 as shown at _http://www.m222.net/R1b1c7_?
Further, my CDYa = 37 and CDYb = 40, cf modal 38,39 (or 37,39). Does CDY
have the same complications as 389? Does my CDY represent one, two or
three mutations from the notional?
David Grierson


wrote:

>In a message dated 8/9/2007 1:59:35 P.M. Central Standard Time,
> writes:
>
>I also urge everyone to take the SNP test and determine accurately if you
>are M222 or not - of course if you have the same STR values as a close
>relative, this wouldn't be necessary. This way we can eliminate false
>positives, which can arise due to convergence. For instance I myself have a
>Genetic Distance (GD) from the R1b1c7 modal - as outlined here
>http://www.m222.net/R1b1c7 - as follows:
>
>12-markers - GD of 1
>25-markers - GD of 5
>37-markers - GD of 14
>
>Your Ysearch ID is DFG6F, isn't it? I would have picked out your STRs as NW
>Irish or R1b1c7 despite the divergence from the modal. But you do raise an
>interesting point. I wonder how many R1b1c7 matches really aren't M222+ due
>to convergence?
>
>David Wilson posted an interesting example a few months ago about a Wilson
>who matched the NW Irish modal in STRs but has been tested (and retested) for
>M222 and consistently found negative. If you want to see the sample go to
>the Wilson Surname Project at FTDNA. He is listed under the heading
>"R1b1c7-predecessor?" in the condensed format version.
>
>If there is one there must be more.
>
>
>John
>
>
>
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