PMC:2668061 / 23793-24697 JSONTXT

{"project":"2_test","denotations":[{"id":"19061982-11517423-2048705","span":{"begin":92,"end":93},"obj":"11517423"},{"id":"19061982-15382008-2048705","span":{"begin":92,"end":93},"obj":"15382008"},{"id":"19061982-15632086-2048705","span":{"begin":92,"end":93},"obj":"15632086"},{"id":"19061982-15280900-2048706","span":{"begin":149,"end":151},"obj":"15280900"},{"id":"19061982-12082121-2048707","span":{"begin":841,"end":843},"obj":"12082121"},{"id":"19061982-18032405-2048708","span":{"begin":853,"end":855},"obj":"18032405"}],"text":"The Iberian Peninsula is often regarded as a source for northward postglacial expansions2,3,5 and a sphere of Neolithic influence from the Near East.38 Our study suggests that its recent history has also had a profound influence on its diversity of Y-chromosomal lineages. Historical accounts should allow us to account for this, but they are sometimes written long after the incidents they describe, are usually scarce, and are always recorded with a particular audience in mind (and, therefore, are subject to bias).17 The marked genetic differentiation between the contributing populations in this case allows an attempt to disentangle their influence; such recognition may be more difficult when source populations for migrations or invasions are only slightly differentiated from recipient populations, as in the case of the Anglo-Saxon60 or Viking61 contributions to the British Isles, for example."}