The dairy cattle industry of the world has undergone a radical change in technology, systems and structure during the past twenty-five years. Development and effective use of artificial insemination has been a major part of the change. The centralization of dairy bull insemination and progeny testing units, the evolution of milk recording and computerized sire evaluation methods, and a recognition of the tremendous genetic and economic impact of properly proven dairy sires has stimulated considerable research to determine breeding schemes that optimize the improvement of cattle.

E. B Burnside

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 1, Madrid, Spain, 611–618, 1974
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