Sunday, October 26, 2008

Spouse Paternal Update

I was surprised to see an update on Alan's paternal DNA -

He's now paternally an R1B1B2 M207 (upgraded from a simple R1b)

No projects to join, but here's the info from Wikipedia:

Most of the present-day European males with the M343 marker also have the P25 and M269 markers. These markers define the R1b1b2 subclade.

This subgroup is believed by some to have existed before the last Ice Age and has been associated with the Aurignacian culture[13] (32,000 - 21,000 BC). Archeological evidence supports the view of the arrival of Aurignacian culture to Anatolia from Europe during the Upper Paleolithic rather than from the Iranian plateau[14].

Although the precise route of the M269 marker is not known, it is theorized to have originated in Central Asia/South Central Siberia. It could have entered prehistoric Europe from the area of Ukraine/Belarus or Central Asia (Kazakhstan) via the coasts of the Black Sea and the Baltic Sea.[2] It is considered widespread in Europe throughout the Paleolithic already before the last Ice Age.[15]

Traditionally this culture is associated with the Cro-Magnon people, the first modern humans to enter Europe. However, this view has recently been challenged.[16] The people of the Aurignacian culture were the first documented human artists, making sophisticated cave paintings. Famous sites include Lascaux in France, Altamira in Spain and Valley of Foz Côa in Portugal (the largest open-air site in Europe).

European LGM refuges, 20 kya.

The glaciation of the ice age intensified, and the continent became increasingly uninhabitable. The genetic diversity narrowed through founder effects and population bottlenecks, as the population became limited to a few coastal refugia in Southern Europe. The present-day population of R1b in Western Europe are believed to be the descendants of a refugium in the Iberian Peninsula (Portugal and Spain), where the R1b1b2 haplogroup may have achieved genetic homogeneity.

As conditions eased with the Allerød Oscillation in about 12,000 BC, descendants of this group migrated and eventually recolonised all of Western Europe, leading to the dominant position of R1b in variant degrees from Iberia to Scandinavia, so evident in haplogroup maps.[11]
A second R1b1b2 population, reflected in a somewhat different distribution of haplotypes of the more rapidly varying Y-STR markers, appear to have survived alongside other haplogroups in Eastern Europe.

However, they do not have the same dominance that R1b has in Western Europe. Instead the most common haplogroup in Eastern Europe is haplogroup R1a1.
Note that haplogroup R1b and haplogroup R1a first existed at very different times. The mutations that characterize haplogroup R1b occurred ~30,000 years bp, whereas the mutations that characterize haplogroup R1a occurred ~10,000 years bp.

(In earlier literature the M269 marker, rather than M343, was used to define the R1b haplogroup. Then, for a time [from 2003 to 2005] what is now R1b1b2 was designated R1b3. From 2005 to 2008 it was R1b1c. This shows how nomenclature can evolve as new markers are discovered and then investigated).

1 comment:

Posh And Trendy said...

So he's older then ice :c))
wish more info would come out for us women in the family.