We have R1b ancient DNA found at Kromsdorf, Germany at Bell Beaker site. Unfortunately they could not do a lot of SNP testing on it but my understanding was they confirmed he was U106-. They could not validate a P312 status. That was 2600 BC or so if I remember correctly.
We know some types of R1b were found in Bell Beaker folks. We don't know if all Bell Beaker groups had R1b but at least some in Thuringia did.
Some types of Beaker folks could have provided the vehicle for getting various forms of P312 into Scandinavia early on.
“The Norwegian Coast; so much so fast” by Christopher Prescott, Institute of Archaeology, University of Oslo, Norway -
"The Late Neolithic (the “LN”, 2350-1750 BC) in Norway can be regarded as the initiation of the Bronze Age in southern and coastal Norway. LN-developments were probably sparked by Beaker influences, conceivably also migration, from northern Jutland in Denmark to Lista and Jæren in Southern Norway, and are thus part of wider southern Scandinavian development around the Battle Axe Period to LN Beaker transition. From these geographically and chronologically restricted beginnings, early LN technology, modes of production and culture quickly spread throughout southern and coastal replacing older social, cultural and production forms, and redefining a historical trajectory. Spreading perhaps as far as 1000 km from the Beaker areas in Lista and Rogaland, the speed in which these wide-reaching and dramatic changes took place is equally remarkable, perhaps taking place within a generation. This paper discusses processes and mechanisms that may help in understanding this puzzling outcome of mid third millennium processes." http://events.um.edu.mt/eaa2008/prescott.pdf
“Late Neolithic Expansion to Norway – Memories of a Sea-borne Episode” by Einar Østmo, Museum of Cultural History, University of Oslo, Norway -
"During the Early and Middle Neolithic, South Scandinavian Neolithic cultures were present in Norway foremost in the Oslo Fiord region in SE Norway. Late Neolithic finds are however abundant above all in SW Norway, certainly testifying to the opening of the sea route across the Skagerrak. These finds include Bell Beaker pottery and pressure-flaked points with tang and barbs, in addition to numerous flint daggers and other items. Arguably, the sea-borne expansion was connected with recent inventions concerning shipbuilding, probably made possible by the new metal tools, foremost axes. This marks the beginning of the Northern shipbuilding tradition, distinct from those found in Britain and in the Mediterranean and gave rise to the development of Scandinavian shipbuilding during the Bronze and Iron Ages. http://events.um.edu.mt/eaa2008/prescott.pdf
“Bell Beaker Communities in Thy: The First Bronze Age Society in Denmark” by Prieto-Martinez, M Pilar Oct 2008
"This article presents the conclusions of a study of pottery from an open-air Bell Beaker settlement in Thy, northern Jutland, Denmark. The formal characteristics of all of the pottery documented from the site, a total of 140 vessels, are provided. Sherds from the Bell Beaker tradition are accorded particular interest. A study of the distribution of the pottery at the site is presented. Finally, taking into account data from publications in Denmark, the interpretation focuses on characterizing the ceramic style of Bell Beaker contexts, verifying if domestic and funerary contexts respond to the same formal pattern, as well as their possible relationship with neighbouring regions in Europe. It would seem that the Bell Beaker period was a time of such intense social transformation that the pattern of rationality was transformed to the point that we may speak of the first Bronze Age societies in Denmark. This situation is not only reflected in the general material culture, and the Bell Beaker pottery in particular, but also in the results of human activity seen in the available archaeological record. Furthermore, although this study focuses on Denmark, it may be seen that the processes found are not particular to specific geographic circumstances. Instead, they form part of a broad, European dynamic, a change on a European scale. Power over things became power over people. (Kristiansen 2004:267)" http://connection.ebscohost.com/c/ar...ociety-denmark
“Male symbols or warrior identities? The ‘archery burials’ of the Danish Bell Beaker Culture” by Torben Sarauw - March 2007
"The starting point of this paper is an analysis of 66 Danish burials, which contain flint daggers and archery equipment. The paper examines whether this tradition should be seen as an indication of the presence of organised warriors in the Danish early Late Neolithic, or if it rather reflects some kind of general warrior status related to maleness. In a Danish perspective the archery burials are closely connected to the Bell Beaker Culture of northern Jutland, and the custom seems to originate in the European Bell Beaker Culture, where ranked societies and warrior institutions have been argued to exist."
"Danish Bell Beaker Pottery and Flint Daggers - the Display of Social Identities? by Torben Sarauw - April 2008
"This article summarizes and discusses recent research into the Danish Bell Beaker phenomenon c.2350-1950 BC. Its focus is on the meaning of material culture here represented by Bell Beakers and bifacial lanceolate flint daggers, both seen from a social perspective. The Bell Beaker pottery is known to have had a very wide distribution. However, questions remain as to why Bell Beakers were only adopted in some regions and what meaning this special pottery had? Similarly the Danish type I daggers, which were manufactured within the context of the Danish Bell Beaker phenomenon in the northern parts of Jutland, had a wide distribution. daggers of this type, which in general denote male identity, were exported in vast quantities, especially to Norway and the western parts of Sweden. In both case studies the evidence from a Danish Bell Beaker settlement site excavated in recent years - Bejsebakken - plays a major part."
My guess is that P312 proportions in Scandinavia were higher than current numbers before the Jastorf Expansion. Sometime between the Jastorf Culture and the Anglo-Saxon expansion into the British Isles, U106 also increased in the Scandinavian Peninsula. That's my speculation based on the diversity and distribution of U106.
Think about this. The Vikings intertwined with the Irish and the Scots along many coastal areas. Those are not hotspots for U106. We are more likely to see I1 and R1a popping up in non-English areas were we would expect Viking input. I think the case is good that some P312 in the Isles is of Viking origin, which is what is suspected of L165 and L238.
Nothing has been proven. This is just food for thought.