A protocol for the rapid and simultaneous genotyping of A, C, and 0' CSN2 alleles in goat was developed by single strand conformational polymorphism polymerase chain reaction (SSCP-PCR) technique. Screening the CSN2 variability in 7 goat breeds reared in Italy validated the genotyping test. The SSCP-PCR technique was also suitable for monitoring CSN2 polymorphism. In particular, the discrimination between CSN2*A and CSN2*C is important because the 2 corresponding protein variants cannot be separated by standard typing techniques. The monitoring of CSN2 variability in the goat breeds indicates the predominance of the C allele. In most breeds, CSN2*C occurred with the highest frequency, except in Saanen where CSN2*A and CSN2*C showed similar frequencies. Variant CSN2*C occurred with a frequency of 0.68 (Camosciata), 0.70 (Jonica), 0.71 (Garganica), 0.82 (Maltese), 0.87 (Cilentana), and 0.97 (Orobica). The alignment among the mature CSN2 sequences of different species suggests that CSN2*A is the ancestral allele compared with CSN2*C. Interestingly, the CSN2*A goat variant showed higher frequencies in selected breeds (Saanen and Camosciata).

Predominance of beta-casein (CSN2) C allele in goat breeds reared in Italy / S. Chessa, E. Budelli, F. Chiatti, A.M. Cito, P. Bolla, A. Caroli. - In: JOURNAL OF DAIRY SCIENCE. - ISSN 0022-0302. - 88:5(2005), pp. 1878-1881. [10.3168/jds.S0022-0302(05)72863-0]

Predominance of beta-casein (CSN2) C allele in goat breeds reared in Italy

S. Chessa
Primo
;
F. Chiatti;P. Bolla
Penultimo
;
2005

Abstract

A protocol for the rapid and simultaneous genotyping of A, C, and 0' CSN2 alleles in goat was developed by single strand conformational polymorphism polymerase chain reaction (SSCP-PCR) technique. Screening the CSN2 variability in 7 goat breeds reared in Italy validated the genotyping test. The SSCP-PCR technique was also suitable for monitoring CSN2 polymorphism. In particular, the discrimination between CSN2*A and CSN2*C is important because the 2 corresponding protein variants cannot be separated by standard typing techniques. The monitoring of CSN2 variability in the goat breeds indicates the predominance of the C allele. In most breeds, CSN2*C occurred with the highest frequency, except in Saanen where CSN2*A and CSN2*C showed similar frequencies. Variant CSN2*C occurred with a frequency of 0.68 (Camosciata), 0.70 (Jonica), 0.71 (Garganica), 0.82 (Maltese), 0.87 (Cilentana), and 0.97 (Orobica). The alignment among the mature CSN2 sequences of different species suggests that CSN2*A is the ancestral allele compared with CSN2*C. Interestingly, the CSN2*A goat variant showed higher frequencies in selected breeds (Saanen and Camosciata).
β-casein; Genetic polymorphism; Goat; Single strand conformational polymorphism
Settore AGR/17 - Zootecnica Generale e Miglioramento Genetico
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/9039
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