Did farming cause a bottleneck in #male #genetic
When people abandoned a hunter-gatherer lifestyle and became agriculturalists, initially some 10,000 years ago, they gave up a lot of things.
This significant shift in the way they obtained their food was probably not something they elected to do. Instead, population pressure and diminishing resources forced people into developing new intensified forms of subsistence. This meant people became more sedentary.
Not only did these new arrangements result in the emergence of new social structures and new technological innovations, but it also had some very negative outcomes.
As people intensified their subsistence strategies and became sedentary there was an increase in population size.
In fact, Y chromosome genetic data suggests this reduction at around 8,000 to 4,000 years ago. Essentially there was a genetic bottleneck in male genetic diversity at that time which cannot be easily explained through natural selection.
A lot happened when humanity turned to agriculture.
Originally published: Genome Research