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Archiver > DNA-R1B1C7 > 2009-04 > 1240408609


From: David Ewing <>
Subject: Re: [R-M222] Byrne TMRCA Estimates
Date: Wed, 22 Apr 2009 07:56:49 -0600


Sandy's arguments for not neglecting the more rapidly moving markers are
well taken. Except, as he says, possibly CDY.

Still, I think this line of inquiry is more likely to be productive if it is
restricted to surname modals. The clade structure we are looking for
probably existed before surnames achieved their (relatively) modern form, so
mutations that have occurred since surnames were in use will just amount to
noise. By using surname modals, we will be able to filter that noise out. To
be sure, as Sandy points out, we will lose some of the variance in the
entire body of data, but this is exactly the variance that just adds to our
confusion.

Incidentally, the discussion on this list of Ewing haplotypes is restricted
to those Ewings who are participating in the M222 project and/or those in
YSearch. Our project now has a total of 109 Ewing haplotypes (of which I
think only 5 have fewer than 37 markers). I am happy to make all of this
data available to anyone that is interested, but I don't think it would
serve much purpose--those Ewings in the M222 project are a fairly
representative sample and the modals are the same.

David

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