Genetics and breeding: Associations Between Milk Protein Polymorphism And First Lactation Milk Production Traits In Finnish Ayrshire Cows

摘要

Genotypic effects of β-casein (CN), κ-CN, and β- lactoglobulin (LG) on milk, fat, and protein produc- tion and fat and protein percentages were estimated for 18, 686 Finnish Ayrshire cows in first lactation using an animal model. Casein genotype effects were estimated including individual β-CN and κ-CN simul- taneously in a model and then as composite β-κ-CN. The A_2 allele of β-CN and the A allele of κ-CN, as well As the A_1 allele of β-CN and the B or E allele of κ-CN, Appeared together more frequently than was ex- Pected.