Impact of different strategies and amounts of preferential treatment on various methods of bull-dam selection.

Abstract excerpt

Three records of milk yield, fat yield, and type were simulated for each cow in 20 herds of 200 cows over 13 yr. Preferential treatment or bias was simulated by increasing milk and fat yields by an average of 0, 16, and 32% for separate copies of the simulation. The bias was given to a limited number of cows from the original herds based on four strategies. Five methods of bull-dam selection that used an index...

Topics

• Animals
• Breeding
• Cattle
• Dairying
• Female
• Lactation
• Male
• Models, Genetic
• Pedigree
• Phenotype
• Selection Bias
• Statistics as Topic