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From: "Ken Nordtvedt" <>
Subject: 43 Marker I1a4 Haplotype
Date: Mon, 1 Aug 2005 08:28:50 -0600


I have received my 43 (44?) marker haplotype for a I1a4 (M227+) dna sample. The sample was from an Estonian and the extended haplotype measured by DNA Heritage.

On essentially all the markers but two it looks like a normal I1a haplotype. At DYS426 which is an extremely slow mutating marker, however, it has 10 repeats instead of the usual 11 present in all haplogroup "I" haplotypes. I had previously found a population of 20 such haplotypes (with DYS426 = 10) in Sorenson database and a few in Ysearch as well. The pedigree distribution in Sorenson was strongly German and Russian-German with the addition of a couple Slovenians, a couple Danes, a Swede, and a Brazilian.

The Rootsi paper found I1a4 haplotypes at a small percentage of I1a in Eastern Europe. But they only had 6 German haplotypes in their collection and 8 Dutch. They had a good Danish population but did not test them for M227. The only unusual feature of Rootsi's distribution of I1a4 haplotypes is that they found none among their 60 I1a haplotypes from Sweden.

Another unusual feature of my tested I1a4 haplotype is that it had a fifth DYS464 allele. They reported it 12,14,14,15,16 at 464. It will be interesting if this oddity is present in other I1a4 haplotypes along with the 10 at DYS426?

Actually, I believe the odds are rather high that I1a4 is really a subclade of I1a1. So a P40 test will be done at Ethnoancestry when I get my sample back.

Anyone with an I1a haplotype (8 repeats at DYS455) and also having the unusual 10 at DYS426 should be tested for M227 (I1a4) by Ethnoancestry.

Ken

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