http://vetinari.sitesled.com/india.pdf
"Our reappraisal indicates that pre Holocene and Holocene-era-not
Indo-European expansion have shaped the distinctive South Asian Y
chromosome landscape (Sengupta et. Al. 2005, Abstract)."
"In other words, there is no evidence whatsoever to conclude that
Central Asia has been necessarily the recent donor and NOT THE
RECEPTOR of the R1a lineages (Sengupta et. Al, 2005, p. 17, emphasis
added)."
These findings along with the agricultural studies bolster the case
for a South Asian homeland of IE langauges. The language spread could
have occurred through the "Elite Dominance" model.
M. kelkar