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From: Vincent Vizachero <>
Subject: [DNA] DYF371X
Date: Sat, 8 May 2010 10:46:06 -0400


I am trolling for people with a particular result for DYF371X.

DYF371 is a multi-copy Y-STR marker, with four copies. FTDNA offers a
test called DYF371X which reports the four markers with a SNP attached
to each copy.

Most people have three markers with a "c" attached and one copy with a
"t" attached. We call this "ccct". Example: 10c-12t-15c-16c.

But a small fraction of men have a cctt configuration instead.
Example: 12t-12t-15c-16c.

Because this cctt is very stable, it is useful phylogenetically. I
know that within R1b1* it is a reliable discriminator between the two
major subclades. I am aware of cctt in Q1a3 and I1 also. What I
don't know is how common it is in those groups, nor in which other
haplogroups cctt appears.

Ymatch has 188 entries for DYF371X (with just four examples of cctt),
but I'm looking for folks with cctt who are not in ymatch.

Thanks,

Vince

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