Haplogroup J2 (Y-Dna)
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Haplogroup J2 (Y-DNA)
In human genetics, Haplogroup J2 (M172) is a Y-chromosome haplogroup which is a subdivision of haplogroup J. It is further divided into two complementary clades, J2a-M410 and J2b-M12.
Haplogroup J2 is widely believed to be associated with the spread of agriculture from Mesopotamia (Iraq and Syria).
"The main spread of J2 into the Mediterranean area is thought to have coincided with the expansion of agricultural people's during the Neolithic period." The age of J2 has been estimated as 18,500 +/- 3,500 years ago. Its distribution, centered in Western Asia and Southeastern Europe, its association with the presence of Neolithic archaeological artifacts, such as figurines and painted pottery, and its association with annual precipitation have been interpreted as evidence that J2, and in particular its J2a-M410 subclade belonged to the agricultural innovators who followed the rainfall. However, Di Giacomo stressed the role of post-Neolithic migratory phenomenon, specifically that of the Ancient Greeks, as also being important in the dispersal of Hg J2.
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