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Haplogroup R or R-M207, is a Y-chromosome DNA haplogroup. It is both numerous and widespread amongst modern populations. Some descendant subclades are common throughout Europe, Central Asia and South Asia, and also common in parts of the West Asia, Africa and North America. Others are primarily from West Asia and South Asia. This line is a descendant of haplogroup P-M45. ==Origins== The SNP defining this haplogroup is believed to have arisen during the Upper Paleolithic era: about 19,000 – 34,000 years ago. The most likely geographical location for this is Central Asia, for two reasons: * its immediate ancestor, Haplogroup P most often found at polymorphic frequencies in north Central Asia; * the immediate descendant clades, R1 (including R1a and R1b) and R2 have long been concentrated in populations ranging from South Asia to Western Europe and Africa * the only sibling haplogroup of R-M207, Haplogroup Q, is predominant among populations ranging from North East Asia to the Americas. As a paper by Pille Hallast, Chiara Batini, Daniel Zadik and others put in 2014: "The TMRCA of hg R is 19 KYA, and within it both hgs R1a and R1b comprise young, star-like expansions discussed extensively elsewhere... The addition of Central Asian chromosomes here contributes a sequence to the deepest subclade of R1b-M269, while another, in a Bhutanese individual, forms an outgroup almost as old as the R1a/R1b split." Haplogroup R * was found in the remains of a Palaeolithic boy MA-1 (Mal'ta) near Lake Baikal in Siberia, dating to 24,000 years ago.〔(Raghavan, M. et al. 2014. Upper Palaeolithic Siberian genome reveals dual ancestry of Native Americans, ''Nature'', 505, 87–91. )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Haplogroup R (Y-DNA)」の詳細全文を読む スポンサード リンク
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