GENEALOGY-DNA-L Archives

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Subject: Re: [DNA] 67 marker GDs in the R1b project
Date: Tue, 5 Dec 2006 23:36:47 -0800

Jim, what did you discover about 67 marker haplotypes with a genetic
distance of 6 or less between them? I only found one near match with
different surnames at that resolution (McLellan & ELder, with a
genetic distance of 66/67). The remaining near matches were all with
identical or very similar surnames. Enough to suggest that a genetic
distance of six or less indicates recent common ancestry. For the
McLellan/Elder match, the most distant ancestor listed for the Elder
participant was born in Scotland in 1785. It might be reasonable to
suggest at this point that we would expect a maximum genetic distance
of about ten for any two known relatives tested on 100 markers.
Maximum genetic distance between those with recent common ancestry
seems to be fairly consistent at a distance of one per every ten
markers tested, so long as the markers are picked randomly (for
example, using DNA Heritage's cafeteria menu). Selection of markers
with known higher or slower mutation rates would of course alter the
outcome, but for most packages currently being offered, I think that
a maximum genetic distance of one per every ten tested is a pretty
fair rule of thumb. Pat Tagert

> The number of kits with 67 marker results increased from 199 to
> 252.

This thread:

• [DNA] 67 marker GDs in the R1b project by Jim T <>

  • Re: [DNA] 67 marker GDs in the R1b project by

  • Re: [DNA] 67 marker GDs in the R1b project by Jim T <>
  • Re: [DNA] 67 marker GDs in the R1b project by "brian quinn" <>