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"Modern DNA reveals ancient male population explosions " Topic

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Tango01 Supporting Member of TMP28 Aug 2017 3:43 p.m. PST

….linked to migration and technology

"Y chromosomes bear the marks of a series of explosive increases in male numbers linked to human development

Modern DNA reveals ancient male population explosions linked to migration and technology
News article by the Media Team25 Apr 2016
Nature Genetics doi: 10.1038/ng3559Explosive male-lineage expansions of the last 15 thousand years. Each circle represents a phylogenetic node whose branching pattern suggests rapid expansion. The x-axis indicates the timings of the expansions, and circle radii reflect growth rates—the minimum number of sons per generation, as estimated by our two-phase growth model. Nodes are grouped by continental super-population (AFR, African; AMR, Admixed American; EAS, East Asian; EUR, European; SAS, South Asian) and colored by haplogroup. Line segments connect phylogenetically nested lineages.The largest ever study of global genetic variation in the human Y chromosome has uncovered the hidden history of men. Research published today in Nature Genetics reveals explosions in male population numbers in five continents, occurring at times between 55 thousand and four thousand years ago.

The study, led by Dr Chris Tyler-Smith of the Wellcome Trust Sanger Institute, analysed sequence differences between the Y chromosomes of more than 1200 men from 26 populations around the world using data generated by the 1000 Genomes Project.

The work involved 42 scientists from four continents…"
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