Effect of kappa-casein polymorphism on milk composition in the Orobica goat |
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| Authors: | Chiatti F Chessa S Bolla P Cigalino G Caroli A Pagnacco G |
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| Affiliation: | * Dipartimento di Scienze e Tecnologie Veterinarie per la Sicurezza Alimentare, Università degli Studi di Milano, 20134 Milano, Italy
† Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Brescia, Italy |
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| 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 κ-casein (CSN3) BIEF allele. Significant associations were found between the IEF phenotype and protein and casein percentages. A favorable effect of the CSN3 BIEF 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 κ-casein variants in breeding. The high frequency of BIEF could be exploited in breeding strategies to improve the protein and casein percentages when cheese making is a selection objective. |
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| Keywords: | goat κ-casein genetic polymorphism milk composition |
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