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R-V88 from where…really ?– new study
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[QUOTE]Originally posted by xyyman: [QB] I haven’t read the full study but I am getting so good at this I don’t need to . The abstract alone tells me the story. So R-V88 is older in Africans vs Europeans. That they admit and the data shows. Now here comes the spin. So they switched from uniparental markers to autosomal markers to infer back migration. Why? Because they cannot prove R-V88 is older in Europeans compared to Africans. So without uniparental proof they need to introduce a new goal post. …yes, autosomal markers. Mansa Musa, did I strike gold again? I have been saying this for over 4 years. The chicken is coming home to roost . Also they are now trying to explain WHY Neanderthal ancestry was NOT observed in Africans by the racist Paabo and Reich. Yes, The chicken is coming home to roost . BTW there are a few papers out showing R1b-V88 was widespread in late mid-Neolithic Europe. Why I get time I will post. ---- Chad Genetic Diversity Reveals an African History Marked by Multiple Holocene Eurasian Migrations. Abstract Understanding human genetic diversity in Africa is important for interpreting the evolution of all humans, yet vast regions in Africa, such as Chad, remain genetically poorly investigated. Here, we use genotype data from 480 samples [b]from Chad, the Near East, and southern Europe[/b], as well as [b]whole-genome sequencing from 19 of them[/b], to show that many populations today derive their genomes from ancient African-Eurasian admixtures. We found evidence of[b] early Eurasian backflow to Africa [/b]in people speaking the unclassified isolate Laal language in[b] southern Chad[/b] and estimate from linkage-disequilibrium decay that this occurred 4,750-7,200 years ago. [b]It brought to Africa a Y chromosome lineage (R1b-V88) [/b]whose closest relatives are widespread in present-day Eurasia; we estimate from sequence data that[b] the Chad R1b-V88 Y chromosomes coalesced 5,700-7,300 years ago.[/b] This migration [b]could thus[/b] have originated among Near Eastern farmers during the African Humid Period. We also found that the previously documented Eurasian backflow into Africa, which occurred ∼3,000 years ago and [b]was thought[/b] to be mostly limited to East Africa, had a more westward impact affecting populations in northern Chad, such as the Toubou, who have [b]20%-30% Eurasian ancestry today[/b]. We observed a decline in heterozygosity in admixed Africans and [b]found that the Eurasian admixture can bias inferences on their coalescent history and confound genetic signals from adaptation and archaic introgression.[/b] [/QB][/QUOTE]
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