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http://genome.cshlp.org/content/early/2015/03/13/gr.186684.114.
http://www.genengnews.com/gen-news-highlights/male-genes-preser
Melissa Wilson Sayres, an assistant professor with ASU's School of Life
Sciences, said, “Instead of ‘survival of the fittest’ in biological sense
, the accumulation of wealth and power may have increased the reproductive
success of a limited number of ‘socially fit’ males and their sons.”
“We … detect a cluster of major non-African founder haplogroups in a
narrow time interval at 47–52 kya, consistent with a rapid initial
colonization model of Eurasia and Oceania after the out-of-Africa bottleneck
,” wrote the authors. “In contrast to demographic reconstructions based on
mtDNA, we infer a second strong bottleneck in Y-chromosome lineages dating
to the last 10 ky.”
After applying DNA calibration and Y-chromosome dating techniques, the
researchers arrived at their “bottleneck” findings. The male-specific
bottleneck, the researchers suggested, was caused by “culture changes
affecting variance of reproduction success among males.” |
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