"In other words, Lillico and his fellow researchers are putting alpha male sperm into beta male balls, so the big guys don’t have to do the work."

From "The Ham-maid's Tale: Swines, Sows and Sex in the CRISPR Age" (Wired).

The method is a marked improvement on the current, human facilitated (yes, really) way of breeding pigs, which usually involves a mountable bench, female pig pheromones and a glove. They don’t call them farmhands for nothing, you know… While this technique has produced results in the past, thanks to its clumsy and time-consuming nature, desirable traits don’t manifest for decades.

[Dr Simon Lillico, Core Scientist at The Roslin Institute, University of Edinburgh] and his international colleagues are looking to vastly reduce that time with their more scientific method – one that depends upon one of the great genetic advancements of the last decade: CRISPR.