Beta-casein. More and more AI companies are including this trait prominently in their sire presentations. Reason: following New Zealand, Australia and Asia, also in North America and Europe, there is growing demand for milk with exclusively the beta-casein variant A2A2. How intensively are AIs selecting for A2A2? Aberekin (Spain), Intermizoo (Italy) and Jetstream Genetics (US) provide a response. In addition, HI spoke with the successful A2A2 breeder Dave Eastman, as well as Jon Walker from the A2A2 milk producer, Walker Farms in Ontario.
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