Europe’s first farmers were segregated, expert incomers
Article in National Geographic seems to show clear genetic differences between the first farming communities (circa 5500 BC) found and local hunter gatherer groups in the same regions.
Hypothesis is that the earliest farming communities were incomers who arrived with pre-existing farming skills and domesticated animals in tow.
Link
news.nationalgeographic.co.uk/news/2009/09/090903-europe-first-farmers.html