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Chad Genetic Diversity : Multiple Eurasian Migrations 2016
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[QUOTE]Originally posted by Ish Gebor: [QB] [QUOTE]The haplogroup R1b1a (R-V88) was found with a fre- quency of 8% in the village of Al Awaynat. Generally, haplogroup R and its subsets are spread in Eurasia as far as Siberia (Karafet et al., 2008; Chiaroni et al., 2009; Lancaster, 2010). Nevertheless, R1b1a has been observed at high frequencies in Northwest Africa (27% in the Egyptian Berbers), with peaks in the Chadic-speaking populations from Central Africa, ranging from 29 to 96% in Cameroon, and very rarely is found outside Africa (Cruciani et al., 2010a,b). This haplogroup has been pro- posed to represent the paternal genetic signature of the mid-Holocene migration of proto-Chadic Afro-asiatic speakers across the Central Sahara to Lake Chad (Ehret, 2002; Cruciani et al., 2010a); this suggests a link between Chadic speakers and other Afro-Asiatic speak- ers to the north of the Sahara. In the eight-microsatellite Network analysis of R1b1a chromosomes from Northern and Central Africa (Fig. S2), the Libyan Tuareg R1b1a Y-chromosomes were found to belong to a branch characterized exclusively by haplotypes from Central Africa, more particularly from the Chad area (Cruciani et al., 2010a). This may be likely explained by recent introduction through the slavery practices mentioned above. Nonetheless, the hypothesis that the Libyan Tuareg R1b1a haplotypes may be relics of the migration of Pastoral proto-Chadic speakers, as hypothesized by the ‘‘trans-Saharan’’ hypothesis (Ehret, 2002; Cruciani et al., 2010a), cannot be ruled out [/QUOTE]--Claudio Ottoni, et al. (2011) Deep Into the Roots of the Libyan Tuareg: A Genetic Survey of Their Paternal Heritage [/QB][/QUOTE]
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