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Haplogroup R2a (Y-DNA) : ウィキペディア英語版 | Haplogroup R2a
Haplogroup R2a, or haplogroup R-M124, is a Y-chromosome haplogroup characterized by genetic markers M124, P249, P267, L266, and is mainly found in South Asia, parts of Central and West Asia. ==Term history== Haplogoup R2a is also known as haplogroup R-M124.〔 The first reference to the newly defined haplogroup, "R-M124", was on the 25th of August 2010.〔Myres et al. (2010), "(A major Y-chromosome haplogroup R1b Holocene era founder effect in Central and Western Europe - 2010 )."〕 Before the publication of the 2005 Y-Chromosome Phylogenetic Tree, Haplogroup R-M124 was known as Haplogroup P1 and formerly thought to be a sister clade of Haplogroup R rather than derived from it.〔Manoukian, Jean-Grégoire (2006), "(A Synthesis of Haplogroup R2 - 2006 )."〕 At least 90% of R-M124 individuals are located in the Indian sub-continent.〔 It is also reported in Caucasus and Central Asia at lower frequency..
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