A Handful Of Bronze-Age Men Could Have Fathered Two Thirds Of Europeans

Nicolas🌱 CC BY-SA 27/05/2015

A Handful Of Bronze-Age Men Could Have Fathered Two Thirds Of Europeans | IFLScience
▻http://www.iflscience.com/plants-and-animals/handful-bronze-age-men-could-have-fathered-two-thirds-europeans

Two-thirds of modern European men are found on just three branches (called I1, R1a and R1b). Our results show that these branches each trace their paternal ancestry to a surprisingly recent individual (shown as red dots in Figure 1). By counting the number of mutations that have accumulated within each branch over the generations, we estimate that these three men lived at different times between 3,500 and 7,300 years ago. The lineages of each seem to have exploded in the centuries following their lifetimes, to dominate Europe.

#génétique #europe #conquête #guerre

Nicolas🌱 CC BY-SA

koldobika @koldobika CC BY-NC-SA 27/05/2015

curieusement ça ne concerne pas les femmes
Similarly, a maternal tree can be generated by looking at mitochondrial DNA, which is passed down solely from mothers to their children. However, when looking at this maternal tree, there is no similar explosion. This indicates that whatever factors were responsible for this pattern were specific to men. As the Y chromosome itself contains few genes that could give one man an evolutionary advantage over another, the explanations for this must be a mixture of chance and the cultural factors passed down alongside the genes.
mais ils n’expliquent pas pourquoi

koldobika @koldobika CC BY-NC-SA
Fil @fil 27/05/2015

https://62e528761d0685343e1c-f3d1b99a743ffa4142d9d7f1978d9686.ssl.cf2.rackcdn.com/files/82296/area14mp/image-20150519-30528-1mc26t0.png

Fil @fil
Nicolas🌱 @nicolasm CC BY-SA 27/05/2015

Sûrement un effet de bord du #patriarcat. Je ne sais pas à quel point c’est l’expansion des peuples vainqueurs qui a donné cette proportion de paternalité, ou si c’est la #culture_du_viol sur les femmes des peuples perdants.
Voir aussi :
▻http://www.dailymail.co.uk/sciencetech/article-2930277/Eleven-fathers-Asia-800-million-modern-men-descended-ancient-leaders-in
The 11 fathers of Asia: 800 million modern men are descended from a handful of ancient leaders - including Genghis Khan
Scientists from the University of Leicester traced DNA in modern men to ’founding fathers’ that lived across Asia between 1300BC and 1100AD
The geneticists traced each the eleven lineages back to their potential roots in the Middle East, India, China, Mongolia and south east Asia
They analysed Y chromosomes from 5,000 men from 127 populations
16 million men are thought to be directly descended from Genghis Khan
1.5 million are descended from 14th Century Chinese leader Giocangga
▻http://blogs.discovermagazine.com/gnxp/2010/08/1-in-200-men-direct-descendants-of-genghis-khan
Genghis Khan died ~750 years ago, so assuming 25 years per generation, you get about 30 men between the present and that period. In more quantitative terms, ~10% of the men who reside within the borders of the Mongol Empire as it was at the death of Genghis Khan may carry his Y chromosome, and so ~0.5% of men in the world, about 16 million individuals alive today, do so. Since 2003 there have been other cases of “super-Y” lineages. For example the Manchu lineage and the Uí Néill lineage

Nicolas🌱 @nicolasm CC BY-SA

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