GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2006-11 > 1164660952


From: "Eric Olson" <>
Subject: Re: [DNA] SNP and STR testing for R1a
Date: Mon, 27 Nov 2006 12:55:52 -0800


Hi Julia,

I think so too. When cousin presented a 12/12 match with same surname last
year the question came up if he should test for more markers - to see if we
matched on all 37. I told him I thought it unnecessary because my 37 could
stand for both. Although I had never met this cousin, he was in my GEDCOM
file. Our ancestor-in-common was a 3 x great grandfather was born in 1806
in PA and with a very solid paper trail down to both cousins. No
non-paternal events. We still have another cousin who sent a sample and a
four generation pedigree to SMGF over a year ago. Still awaiting those
results....

R1a is rare only in the databases, but probably outnumbers R1b in absolute
numbers worldwide. Its diversity hasn't really been sampled yet as deeply
as has R1b.

Regards,
Eric Olson




> [Original Message]
> From: <>
> To: <>
> Date: 11/27/2006 12:09:10 PM
> Subject: Re: [DNA] SNP and STR testing for R1a
>
> Hi Eric, to match on the first 12 markers and not match when extended to
25,
> 37 or 67, is not only possible, but it happens often. Of course, if you
know
> this cousin and you carry the same surname, then you can be pretty sure
that
> the match would hold up when expanded to more markers.
>
> As for the distance of 9/37, I would never consider that a match. Just
> because R1a is rare as compared to R1b, that doesn't mean that it is rare
in the
> world and that a distant match should be considered closer, just because
there
> aren't many R1a in the database. I have one line that is R1a and my
several
> matches are exact on 25 markers. Don't waste your time following a star.
Wait for
> a real match.
>
> Julia
>
> In a message dated 11/27/2006 1:47:49 PM Central Standard Time,
> writes:
> I suppose it is possible to grossly mismatch on the first panel of
> 12, but match from there on out. although I think that is very
improbable.
>
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