How a ‘Nonsense’ Genetic Mutation from a Bull Born in 1962 Caused the Loss of Half a Million Calves Worldwide
By Lisa Howard Pawnee Farm Arlinda Chief was one of the most prolific bulls in the history of Holstein cattle breeding — but he also introduced a lethal gene into the population, responsible for an estimated half million spontaneous abortions worldwide. Now researchers have identified the mutation responsible, enabling ranchers to test for and avoid […]

