Journal of Dairy Science · 1966 · 12 citations · 6 references
AgricultureAnimal SciencesDairy ScienceDairy Herd ManagementLivestock ProductionBreedingCrossbreeding SystemsDairy ProductionCrossbreeding EfficiencyCrossbreeding ParametersGenetic Gain In CrossbreedingHeritability Of Milk Production TraitsMilk Yield Heritability
Productive performance of 176 crossbreds, representing 15 groups, was compared to that of the purebred contemporary Brown Swiss, Guernseys, and Holsteins. The Guernsey Holstein and Holstein Guernsey crosses were bred to Swiss bulls to obtain three-breed crosses. A rotational system using Guernsey or Holstein bulls, or both, was followed to obtain thirdand fourth-generation crosses. Most of the bulls used were young pedigree-selected sires. Data analyzed were the deviations of a crossbred record from records of contemporary purebreds.
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