GENEALOGY-DNA-L ArchivesArchiver > 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)
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.
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
> 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 .