One don’t need to limit breeding ability to get genetic selection: just move those who you not interesting on into outside world. For example, i want to breed dogs who are good to live in mountains. I put a group of dogs on a mountain. As generations pass, those dogs which are good in living in the mountain will remain there and even move higher, and those who are not good in it, will move to live in plains. Those who live in plains may even have higher number of children.
One don’t need to limit breeding ability to get genetic selection: just move those who you not interesting on into outside world. For example, i want to breed dogs who are good to live in mountains. I put a group of dogs on a mountain. As generations pass, those dogs which are good in living in the mountain will remain there and even move higher, and those who are not good in it, will move to live in plains. Those who live in plains may even have higher number of children.