GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2008-05 > 1211484147


From: Vincent Vizachero <>
Subject: Re: [DNA] S21/S28 Split+m223 stuff
Date: Thu, 22 May 2008 15:22:27 -0400
References: <769063.31538.qm@web86608.mail.ird.yahoo.com><003601c8bc36$10308410$6400a8c0@Ken1>
In-Reply-To: <003601c8bc36$10308410$6400a8c0@Ken1>


On May 22, 2008, at 2:02 PM, Ken Nordtvedt wrote:
> I don't know of any "commonly previous thoughts" that S21 MRCA was
> older than S28 MRCA? What gave you that impression?


The ratio of estimated TMRCA for S21 and S28 depends on the way in
which the markers are weighted and which markers are considered.

I've copied an excerpt from Tim Janzen's post yesterday in which he
compared the datasets using your tool and using James Heald's tool.

In some cases (the 37 marker cases, for example) S21 actually looks
slightly older than S28 using your tool but dramatically younger
using James'.



On May 21, 2008, at 8:11 PM, Tim Janzen wrote:

> Project JH -M KN -M JH +M KN +M # of haplotypes # of markers
>
> R1b1c9 S21+ 4110 3486 4050 3539 190 12
> R1b1c9 S21+ 4808 3465 4224 2727 180 37
> R1b1c9 S21+ 3349 3075 3462 2431 120 67
>
> R1b1c10 Kerchner 6655 4001 6937 4876 62 12
> R1b1c10 Kerchner 5928 3352 5401 2537 59 37
> R1b1c10 Kerchner 6224 3589 5924 2850 43 67


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