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Bovine <i>β</i>-casein: Detection of two single nucleotide polymorphisms by bidirectional allele specific polymerase chain reaction (BAS-PCR) and monitoring of their variation

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Open Journal of Animal Sciences 2013年第1期3卷 36-41页

作者： stefania chessa Omar Bulgari Attilio Rossoni Gabriella Ceriotti Anna Maria Caroli Department of Molecular and Translational Medicine University of Brescia Brescia Italy Department of Veterinary Science and Technology for Food Safety University of Milan Milano Italy IBBA-CNR Milano Italy Italian Brown Breeders Association Bussolengo Italy

Due to the functional importance of bovine milk protein polymorphisms, their correct discrimination is of great interest both from a scientific and practical point of view. Nowadays a large number of commercial platforms are available for semiautomated or fully automated SNP geno-typing. However, in some cases the use of simple and rather cheap methods is an effective tool to be implemented within one’s own laboratory for the routine analysis of a specific SNP. The present paper describes two simple tests based on the bidirectional allele-specific polymerase chain reaction (BAS-PCR) developed for the identification of β-casein (CSN2) B and I genetic variants. The practical application of the two methods on a panel of 84 Italian Brown bulls and 100 Italian Friesian cows is also discussed, including the biological significance of the two genetic variants and the importance of taking their occurrence into account when linkage analyses are performed on milk functional properties. A combined system for analysing milk protein variants by isoelectrofocusing (IEF) and the BAS-PCR assay developed for CSN2*I is described.

关键词： Bovine β-Casein Milk Protein Polymorphism

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