I know u don't like hebrews, but let's be fair. U should know very well that basketball, track&field, football wasn't always culturally accepted by them or tolerated among white folks. Too much trouble to bother and America was much more racist before 70s.
As to why they do good at this sports, weren't they selectively breed among strong one's?
No! No! No! No!
There never was or could have been a "breeding program" for many, many reasons, too numerous to list really. For one, economically, it would not make sense for starters.
Most slave owners did not own Tons of slaves. The majority just 1-5 (hardly a big gene pool to select from, which they didn`t bother to do anyway). On the bigger plantations you had hundreds (still not a big enough gene pool to select from and they didn`t select anyways), and then the Plantation Owners did not force breed at all. Instead, slaves were permitted to carry on as a normal family would and Plantation Owners always tried to keep families together. Slaves were permitted to marry whoever they wanted and owners recognized these marriages. There is a lot more to this aspect that would take forever to delve into.
Not only that, but the Phenotype does NOT determine a Genotype. Just because James was good with a pitch fork and plow does not automatically mean his son James Jr. would be equally adept. Also, there simply would be no way to identify positive alleles in such a short amount of time. There would be nothing to look for nor any scientific way of doing so.
Hope this helps and like I said, do a search. I have went into great detail on this elsewhere. The smaller and more skilled would be better. Less calories to feed them and they could actually do something.
The main thing any plantation owner looked for was work ethic and skill sets and work history (things you couldn`t breed for anyways). As amusing as that sounds, its true. If Junius was known to be a good cook and his wife Mary a domestic capable of keeping the plantation`s owners children in line, then they were incredibly important and more valuable to keep together which always happened. Same thing with field workers. You can`t get much work out of someone separated from their family and unhappy. Much better to keep families together. Plus, most owners cared what happened to their slaves and their own children grew up side by side with them.
