title: Effect of kappa-casein polymorphism on milk composition in the Orobica goat.
abstract: The aim of this work was to study the effects of isoelectrofocusing (IEF) milk protein variants on milk composition in the Italian Orobica goat breed, which is characterized by a rather high frequency of the kappa-casein (CSN3) B(IEF) allele. Significant associations were found between the IEF phenotype and protein and casein percentages. A favorable effect of the CSN3 B(IEF) variant was found for both protein and casein percentages, with a codominance trend for the 3 phenotypes: BB > AB > AA. Depending on the selection purpose, emphasis could be given to different kappa-casein variants in breeding. The high frequency of B(IEF) could be exploited in breeding strategies to improve the protein and casein percentages when cheese making is a selection objective.
authors: Dipartimento di Scienze e Tecnologie Veterinarie per la Sicurezza Alimentare, Università degli Studi di Milano, 20134 Milano, Italy.
authors: F
authors: F
authors: Chiatti
authors: S
authors: S
authors: Chessa
authors: P
authors: P
authors: Bolla
authors: G
authors: G
authors: Cigalino
authors: A
authors: A
authors: Caroli
authors: G
authors: G
authors: Pagnacco
mesh_terms: D000483:Alleles; D000818:Animals; D002364:Caseins / Q000737:chemistry*; D005260:Female; D006041:Goats / Q000235:genetics*; D007525:Isoelectric Focusing / Q000662:veterinary; D007558:Italy; D016018:Least-Squares Analysis; D016014:Linear Models; D008892:Milk / Q000737:chemistry*; D010641:Phenotype; D011110:Polymorphism, Genetic; D020539:Sequence Analysis, Protein
chemical_list: D002364:Caseins