Archiver > GENEALOGY-DNA > 2006-07 > 1153880767

From: charles <>
Subject: Re: [DNA] Kerchner family null results at DYS425
Date: Tue, 25 Jul 2006 22:26:07 -0400
References: <> <> <> <>
In-Reply-To: <>


I scanned my emails from you to me also for the last two years and I
have nothing about marker DYS425 issues sent from you to me.

To see what was out there on this DYS425 issue previously, I scanned the
List archives too and found a message about DYS425 on this very subject
addressed to you by a Mr. Odom dated in January 2006. Maybe that is what
you are remembering, the Mr. Odom dialog.

I don't think there is any need for anyone to be upset. I think it is
better for more people to know there are testing issues with DYS425. At
least now I know more about some possible technical reasons why FTDNA
has been having difficulty getting a result for me and my cousins at DYS425.

As to why FTDNA decided to offer DYS415, I believe that FTDNA decided to
offer marker DYS425 because OA offers it. Don't know for sure but I
would suspect that is the reason.

Does this explanation offered by Gareth and confirmed by you mean that a
YSTR allele value test result cannot be obtained for me nor any of my
cousins in my project for DYS425? Or does it take extra special testing
efforts? Will a change of primers help get a result for we Kerchner
folks and others with this same DYS425 null issue? By the way, FYI, a
lab other than FTDNA had reported me as having an allele of 12 at
DYS425. That is puzzling to me at this point.

If you prefer to answer any of this off list, feel free to do so.

Charles Kerchner
Emmaus PA USA

Thomas Krahn wrote:
> Charles,
> I just screened my e-mail box and maybe you are right that I didn't
> explicitely tell you this directly. Sorry, I just was too upset because
> I already knew that discussion will start when I heard FTDNA announce
> the DYS425 marker.;)
> However, Gareth and I mentioned this several times on the list when
> users where asking "What's my DYS425?" when they received a DYF371 with
> 4 C-types. I actually developed the DYF371X test because we recognized
> the problem already during development of the DYS425 marker. I think
> your result was one of the first that proofed the validity and the
> usefulness of the extended DYF371 test.
> Thomas

> charles wrote:
>> Thomas:
>> Sorry to get you almost crazy. :-) Quite frankly I don't remember you
>> telling me anything about me regarding DYS425. I you still have that
>> email where you told me the below, resend it to me to refresh my
>> memory. And I have to admit these details about the Y chromosome are
>> beyond my knowledge level and understanding as I am not a trained
>> geneticist or molecular biologist.
>> I only posted the message to share what I had heard as to a possible
>> cause. I also said I would share more as I learned it. As I said, I
>> didn't have all the details. Gareth's posting and your subsequent
>> posting offers an explanation for which I thank you both. I will pass
>> along what you and Gareth are saying and see what response it get. And
>> Thomas, now that you are part of the same organization, you can talk
>> directly to them about it too. I'm kit 577 and on your system I'm User
>> ID 5090.90.
>> Again, my intention was not to upset anyone.
>> Charles Kerchner

>> Thomas Krahn wrote:
>>> Thanks Gareth for correcting this,
>>> I nearly got crazy when I read Charles' posting! Charles, I have told
>>> you earlier (about 9 month ago!) that you actually DON't have a SNP
>>> at DYF379/DYS425 because you have LOST the SNP by a recLOH event. I
>>> have also told Bennett not to test for DYS425, but to test for
>>> DYF371X, but I think it will need time until everybody understands
>>> the connection of DYS425 and DYF371. This is probably one of the
>>> reasons why so many Panel 38-67 tests have to be re-run. OA has
>>> simply prevented a further explanation by calling this kind of result
>>> M*. But if you look at DYF371X results in Ymatch you will find
>>> several haplotypes with a lost T-type allele probably caused by a
>>> recLOH.
>>> Has anybody from haplogroup E received a valid result of DYS425? If
>>> yes, I would be very interested to see the haplotype!
>>> Thomas

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