Short communication: Carora cattle show high variability in αs1-casein (Articolo in rivista)

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  • Short communication: Carora cattle show high variability in αs1-casein (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.3168/jds.2007-0420 (literal)
Alternative label
  • Anna Caroli; Stefania Chessa; Francesca Chiatti; Daniela Rignanese; Bernabe Melendez; Rita Rizzi; Gabriella Ceriotti (2008)
    Short communication: Carora cattle show high variability in αs1-casein
    in Journal of dairy science; American Dairy Science Association-ADSA, Champaign (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Anna Caroli; Stefania Chessa; Francesca Chiatti; Daniela Rignanese; Bernabe Melendez; Rita Rizzi; Gabriella Ceriotti (literal)
Pagina inizio
  • 354 (literal)
Pagina fine
  • 359 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 91 (literal)
Rivista
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  • 6 (literal)
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  • 1 (literal)
Note
  • Google Scholar (literal)
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
  • PubMe (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Anna Caroli - Dipartimento di Scienze Biomediche e Biotecnologie, Universit√° degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy; Stefania Chessa, Francesca Chiatti, Daniela Rignanese, Rita Rizzi, Gabriella Ceriotti - Dipartimento di Scienze e Tecnologie Veterinarie per la Sicurezza Alimentare, Universit√° degli Studi di Milano, Via Trentacoste 2, 20134 Milano, Italy; Bernabe Melendez - Facultad de Ciencias Veterinarias, Universidad Central de Venezuela, Maracay, Edo. Aragua, Venezuela (literal)
Titolo
  • Short communication: Carora cattle show high variability in αs1-casein (literal)
Abstract
  • The objective of this study was to analyze the genetic variability of milk proteins of the Carora, a short-horned Bos taurus cattle breed in Venezuela and in other Southern American countries that is primarily used for milk production. A total of 184 individual milk samples were collected from Carora cattle in 5 herds in Venezuela. The milk protein genes αs1-casein (CN) (CSN1S1), β-CN (CSN2), κ-CN (CSN3), and β-lactoglobulin (LGB) were typed at the protein level by isoelectrofocusing. It was necessary to further analyze CSNlSl at the DNA level by a PCR-based method to distinguish CSN1S1*G from B. Increased variation was found in particular at the CSN1S1 gene, where 4 variants were identified. The predominant variant was CSN1S1*B (frequency = 0.8). The second most common CSN1S1 variant was CSN1S1*G (0.101), followed by CSN1S1*C (0.082). Moreover, a new isoelectrofocusing pattern was identified, which may result from a novel CSN1S1 variant, named CSN1S1*I, migrating at an intermediate position between CSN1S1*B and CSN1S1*C. Six cows carried the variant at the heterozygous condition. For the other loci, predominance of CSN2*A 2 (0.764), CSN3*B (0.609), and LGB*B (0.592) was observed. Haplotype frequencies (AF) at the CSN1S1-CSN2-CSN3 complex were also estimated by taking association into account. Only 7 haplotypes showed AF values >0.05, accounting for a cumulative frequency of 0.944. The predominant haplotype was B-A2-B (frequency = 0.418), followed by B-A 2-A (0.213). The occurrence of the G variant is at a rather high frequency, which is of interest for selection within the Carora breed because of the negative association of this variant with the synthesis of the specific protein. From a cheese-making point of view, this variant is associated with improved milk-clotting parameters but is negatively associated with cheese ripening. Thus, milk protein typing should be routinely carried out in the breed, with particular emphasis on using a DNA test to detect the CSN1S*G variant. The CSN1S*G allele is likely to have descended from the Brown Swiss, which contributed to the Carora breed and also carries this allele. (literal)
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