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Archiver > GENEALOGY-DNA > 2008-05 > 1210524600


From: Vincent Vizachero <>
Subject: Re: [DNA] updated ages of selected Y haplogroups andsubclades using the variance method
Date: Sun, 11 May 2008 12:50:00 -0400
References: <IGEOKAGLHNEKPCKPADIGAEALAPAB.bbailey.lowedna@baileyconnection.com><48271864.5010109@sbcglobal.net>
In-Reply-To: <48271864.5010109@sbcglobal.net>


On the other hand, clades that are genuinely young will have more
markers with small variances.

Systematically throwing out some markers after they have been
examined in the sample of interest strikes me as procedurally
indefensible. Rather, I think the best course of action is to simply
use as many single copy markers as we have available and hope for the
best.

I've just about given up hope that we can reliably use STR variance
to get absolute TMRCA estimates anyway.

Vince



On May 11, 2008, at 12:01 PM, Alfred A. Aburto Jr. wrote:

> Those markers that have very small or zero variance I would tend to
> throw out as they are not contributing to the estimate of age.

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