In any world with a basic (and we talk about very basic here) understanding of genetics, and of the advantages that intelligence can bestow upon an individual, somebody is going to get the idea to selectively breed the best and the brightest to each other to produce smarter and smarter people. When a leader, government, or other higher-up starts to command, pressure or incentivize the smartest people to pair off for breeding purposes, you have this trope. Note the frequent pairing with plots about eugenics. Examples of Genius Breeding Act include: