GENEALOGY-DNA-L Archives

From: "Ken Nordtvedt" <>
Subject: Another Difference between Atlantic and Frisian R1b
Date: Thu, 1 Sep 2005 10:00:47 -0600

R1b with 24 at DYS390 and 11 at DYS391 is the most populous R1b form and serves as the bare root of the "Atlantic" R1b. The "Frisian" R1b with 23/11 as sampled by Sorenson database has about half the total population as the Atlantic R1b. But along the Frisian coast of NW Europe 23/11 R1b reaches equal population with Atlantic R1b, while in Iberia the 23/11 percentage falls to very low levels.

Here is another interesting facet of the difference of these R1b forms. If you have both 24 at DYS447 and 11 at H4, you are substantially more likely to be 23/11 R1b than 24/11. In the Sorenson database there were 131 of the former but only 55 of the latter in spite of the 2 to 1 advantage of 24/11 R1b in the database. So this can be added to the differences between 24/11 and 23/11 R1b noted at DYS464 a week or so ago. These are encouraging signs that with some hard work a robust difference can be established between the history and distribution of two major blocks of the R1b population for which the statistics is much better due to the large populations here being examined.

My working hypothesis is that northern continental Europe got repopulated after the last glacial maximum by more than one stream of R1b coming from more than one refuge in more southerly Europe. But where these streams converged they got rather mixed up, so sorting them out will be more work than it has taken to find other younger clusters in R1b, as well as in R1a, and I haplogroups.

Ken

This thread:

• Another Difference between Atlantic and Frisian R1b by "Ken Nordtvedt" <>