Breeding for A2 cows should be easy. And it is, as long as breeding bulls are typed for their A1 and A2 status. In New Zealand, where I come from, all our dairy breeding bulls used for artificial breeding are genetically typed for their A2 status. Also, most Australian dairy breeding bulls are typed for their A2 status. But in most other parts of the world this is not yet the case. It is a great frustration to me that A2 Corporation claims testing patents in most parts of the developed world, but is neither offering the service themselves, nor licensing others to provide the service. I consider this an unacceptable situation.
Back in 2007 I presented a paper at the International Farm Management Conference in Ireland on breeding for A2 cows. The paper is attached here: a2 breeding paper
Professor of Farm Management and Agribusiness