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Archiver > GENEALOGY-DNA > 2006-08 > 1155305522


From:
Subject: Re: [DNA] Matching
Date: Fri, 11 Aug 2006 10:12:02 EDT


In a message dated 8/11/2006 6:47:05 AM Pacific Daylight Time,
writes:

> Look at: http://nitro.biosci.arizona.edu/ftdna/TMRCA.html
>
> FTDNA uses a standard mutation rate of 0.002 (mutations per generation)
> and also a higher mutation rate of 0.004. Unfortunately FTDNA doesn't
> always tell you if they are using the standard or higher mutation rate.
> In the reference above look under the section on "mutations" and there
> you will see a reference supporting their claim for using the higher
> mutation rate (it gives a lower bound basically)...
>

Those pages were written prior to FTDNA's in-house pedigree study. The paper
by Holtkemper with the .004 rate is a bit of an oddity -- you can search our
archives for his name for some more details on that.

At the 2004 conference, they divulged mutation rates per panel, but not per
marker. The per marker rates remain proprietary, but they are incorporated
into the FTDNATiP report, as per the footnote on a report:

"The FTDNATiP results are based on the mutation rate study presented during
the 1st International Conference on Genetic Genealogy, on Oct. 30, 2004. The
above probabilities take into consideration the mutation rates for each
individual marker being compared."

The average panel rates, presented orally at the conference, are

01-12 = .00399
13-25 = .00481
26-37 = .00748

Ann Turner


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