Obviously, this is in conflict with the mitochondrial results.
But the democratisation of the field, due to a surfeit of data, is now enabling exploration of more diverse topics, including questions related to the Indian subcontinent.
Martin Richards, co-author of the paper in BMC, explains, "This high resolution allows for both very detailed genealogical information and quite precise genetic dating, so we can see where and when lineages branch off into a new territory.""There is a very marked sex bias in the arrival [in India] of new peoples from the steppe zone during the bronze age" Martin Richards, Archaeogenetics professor Ancient DNA has also shed light on the relationship of the various branches of R1a1a.
Extinct Central Asian steppe pastoralists, the Scythians, and their geographic kin, the Srubna people, who dwelt north of the Caspian Sea 3,750 years ago, also carry this Y lineage.
The discoverer of this lineage, the geneticist Spencer Wells, says that his work "in the late 1990s strongly supported a significant migration from the steppes of Eastern Europe and Central Asia into India in the past 5,000 years".
Wells connected this to Indo-European speaking nomads, and believes the latest results have borne that out.