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Revision as of 12:26, 20 March 2006 editSugaar (talk | contribs)4,316 edits Improved description of the distribution in Europe. Erased dubious Viking reference.← Previous edit Revision as of 12:22, 25 March 2006 edit undoDenoir (talk | contribs)647 editsm india cleanupNext edit →
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In ], '''Haplogroup R1a1 (M17)''' is a ] ], that is spread across ]. In ], '''Haplogroup R1a1 (M17)''' is a ] ], that is spread across ].


It is common in ], Northern ] and ]. In Europe the highest frequencies are in ]. Today it is found with its highest levels in Poland and Russia, where one out of two men has this haplogroup. Relatively high frequencies are also found in ]. Maybe associated in Europe to Indo-European expansion, its frequency decreases towards the West and South of the continent. In ] haplogroup R1a1 is found in both the Hindu ] and ] populations, and it is most diverse in tribal, rather than caste populations, therefore researchers have concluded that it is not necessarily a signature of Central Asian origin . It is common in ], Northern ] and ]. In Europe the highest frequencies are in ]. Today it is found with its highest levels in Poland and Russia, where one out of two men has this haplogroup. Relatively high frequencies are also found in ] and is believed to have been spread across Europe by the ], which accounts for the existance of it in among other places the ].

In ] data points to a correlation between the historical ] caste and the R1a haplogroup, which is consistent with a northern invasion from Central Asia. Studies have however also shown a more diverse presence in Indian tribal populations, suggesting that it is not necessarily always a signature of Central Asian origin .



==Origins== ==Origins==

Revision as of 12:22, 25 March 2006

In human genetics, Haplogroup R1a1 (M17) is a Y-chromosome haplogroup, that is spread across Eurasia.

It is common in Europe, Northern Central Asia and India. In Europe the highest frequencies are in Eastern Europe. Today it is found with its highest levels in Poland and Russia, where one out of two men has this haplogroup. Relatively high frequencies are also found in Northern Europe and is believed to have been spread across Europe by the Vikings, which accounts for the existance of it in among other places the British Isles.

In India data points to a correlation between the historical Brahmin caste and the R1a haplogroup, which is consistent with a northern invasion from Central Asia. Studies have however also shown a more diverse presence in Indian tribal populations, suggesting that it is not necessarily always a signature of Central Asian origin .


Origins

The first carriers of the R1a1 haplotype are believed to have been nomadic farmers in the steppes of northern Central Asia about 10,000 years ago. Current theories point to them being the first speakers of the proto-Indo-European languages (the Kurgan culture) and the first ones to domesticate the horse.

Relationship to other haplogroups

R1a1 is a subgroup of Haplogroup R (M207).

It is related to Haplogroup R1b (M343) which is dominant in Western Europe, and more distantly related to Haplogroup R2 (M124).

See also

References

External links

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