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Haplogroup R2b, or R-FGC21706/R-FGC50231, is a Y-chromosome haplogroup characterized by genetic marker FGC21706/FGC50231. It is one of two primary descendants of Haplogroup R2 (R-M479), one being R2a (R-M124) and the other being the aforementioned R2b.
R2b and its origin are not very well known, due to the extremely low number of testers who are positive for this SNP [1] , (29/2349 testers on FTDNA are positive for R2b out of the total R2 positive population).
Of the R2b individuals tested, 2% hail from Pakistan, 0.6% from Tajikistan, 0.4% from Afghanistan, 0.2% from India, 0.1% from Bahrain and <0.1% in both Saudi Arabia and Iraq [2]