Here are a few excerpts from Jocelyne Desideri's conclusions of Bell Beaker dental traits:
Full study http://www.fondationlatsis.org/plpdf/Prix_Latsis/UNIGE_2008.pdf"The emergence of the Bell Beaker culture in the western sphere resulted from the displacement of individuals from the Iberian Peninsula into Europe.""Phase 1: Migrations of Bell Beaker individuals from the Iberian Peninsula toward the east, while the eastern domain is still occupied by the Corded-Ware culture."
From Iberia to ....France(Revised..again, see above post)? Here is the current variance for 4 P312 groups at 51 markers: France-.302, Eastern Europe-.296 (n-14), Iberia-.247(revised), Italy/Switzerland-.18 (n-8)."Phase 2: Part of the Corded-Ware on the edge of the phenomenon was individualized and adopted, by borrowing, some of the western Bell Beaker traditions. Diffusions of this new society-the Beakers-continued toward the east. At the same time certain eastern elements were diffused towards the west."
Is this when/where U152 and L21 emerge, towards the west?
Here are some variance numbers for the latest U106 data from U106 project:
.255 - SE Europe (Italy, 1Hungarian, and 1 Romanian), n-12
.252 - NE Europe, n-26
.252 - NW Europe, n-55
.25 - Central Europe, n-33
.24 - Scandinavia, n-29
.232 - Italy by itself, n-10
.20 - SW Europe, n-9
When comparing the variances of P312 and U106, they seem to have different population diffusions coming from opposite directions. The common axis, though subtle, for their L11 ancestors seems to run in a line from the Danube to France(revised, see above post). Interestingly enough, Myres found no L51 and L11 in the Balkans, though there are a few individuals in the various projects.