Originally Posted by
blogen
Inner and Central Asia is an overlap zone for the R1a1-Z280 and R1a1-Z93 lineages [which] implies that an early differentiation zone of R1a1-M198 conceivably occurred somewhere within the Eurasian Steppes or the Middle East and Caucasus region as they lie between South Asia and Central- and Eastern Europe."
Pamjav, Horolma; Fehér, Tibor; Németh, Endre; Pádár, Zsolt (2012), "Brief communication: new Y-chromosome binary markers improve phylogenetic resolution within haplogroup R1a1", American Journal of Physical Anthropology, 149 (4): 611–615, doi:10.1002/ajpa.22167, PMID 23115110