Around 5000bc, when the LBK culture falls, the gene pool in central europe becomes extremely heterogenous, with samples being all over the place on PCA with varying amounts of WHG and ANF ancestry. After 4500bc this stabilizes into the Ethnogenisation of new cultures such as Chasseen, Michelsberg, Lengyel and TRB, which are all dominated by Hunter Gatherer Lineages. The British Neolithic is derived from Chasseen and Michelsberg groups, where their line of I2a underwent a large founder effect.

There are various weird discrepancies in the specific clades of I2a however, for example Wartberg having a large amount of I2a2, which is extremely rare in other groups. Other discrepancies are the dominance of I2a1-l161 in Funnelbeaker, and the dominance of I2a1-l801 in GAC, which is Autosomally identical to Funnelbeaker and materially derived from it.