The origin and development of the African haplogroup R1b

Cradle of Civilization

Haplogroup R1b (Y-DNA).PNG

R1b1 (P25) people might have been among the first people to domesticate cattle in eastern Anatolia and northern Mesopotamia/Syria during the Pre-Pottery Neolithic period. P297 branch moved north across the Caucasus to seek grazing grounds for their cattle, while the V88 branch migrated south to the Levant, then to Africa, following the Nile Valley until the Sahel, then spreading westward.

Although human Y chromosomes belonging to haplogroup R1b are quite rare in Africa, being found mainly in Asia and Europe, a group of chromosomes within the paragroup R-P25* are found concentrated in the central-western part of the African continent, where they can be detected at frequencies as high as 95%. Phylogenetic evidence and coalescence time estimates suggest that R-P25* chromosomes (or their phylogenetic ancestor) may have been carried to Africa by an Asia-to-Africa back migration in prehistoric times.

Here, we describe six new mutations that define…

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