GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2010-12 > 1293770561


From: vernade didier <>
Subject: Re: [DNA] Re : How old is Y-Chromosome Adam?
Date: Fri, 31 Dec 2010 04:42:41 +0000 (GMT)
In-Reply-To: <201012302214.oBUME7Pa027462@mail.rootsweb.com>


Dear Tim,

Than you for your detailed answer and sorry for misspelling your name.
Frankly, I think that there is a sampling problem. May be it's time to know which of the ysearch entries are true haplogroup A entries (for example).
About ysearch : is 7GW86 Phaam a correct entry ?
I don't think it's possible to get any "A" estimate with 3 Boyd entries among 9 haplotypes. The slow mutating markers are requiring many more haplotypes of each groups and with a "random" sampling covering most of the subclades.

Didier

Tim Janzen answered :
> Dear Didier,
>     These were the kit numbers and the
> earliest ancestors associated
> with the haplotypes for the 9 haplogroup A haplotypes I
> used in my original
> calculations in July 2009:
>
> 16415  Shadrick Wright b.1790-1800 Lancaster Co SC 
> 60311  Frederick Bass; b.1838, Robeson Co., NC 
> 78826  Matthew Stephens 
> 55139  john boyd 
> 78856  Robert A. Boyd 
> 130540 Henry Dawson Roberts 1791 Nelson Co. VA
> >John>John 
> 100274 William Rea, b.c. 1750, Greenville District, SC 
> 4532   James Boyd 
> 121019 Hugh Boyd 
>
I wrote :
Anyway I would like to know which A
> haplogroup haplotypes
> were used (the same for the other groups) in Tim Janzen
> calculation .





This thread: