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Provedor de dados:  Inra
País:  France
Título:  Effects of polymorphisms in the calpastatin and μ-calpain genes on meat tenderness in 3 French beef breeds
Autores:  Allais, S.
Journaux, L.
Levéziel, H.
Duprat, N.
Raynaud, P.
Hocquette, J.F.
Lepetit, J.
Rousset, S.
Denoyelle, C.
Bernard-Capel, C.
Renand, G.
Data:  2011
Ano:  2011
Palavras-chave:   beef cattle
Μ-calpain gene
Calpastatin gene
Meat quality
Resumo:  The objectives of the study were toevaluate allelic frequencies and to test the associationof polymorphisms in the calpastatin (CAST) andμ-calpain (CAPN1) genes with meat tenderness in 3French beef breeds. A total of 1,114 Charolais, 1,254Limousin, and 981 Blonde d’Aquitaine purebred youngbulls were genotyped for 3 SNP in the CAST gene and4 SNP in the CAPN1 gene. Two of these markers, 1in each gene, can be found in Australian or Americancommercial genetic tests. Others have previously beenreported in American studies or are newly evidencedSNP. The quantitative traits studied were Warner-Bratzler shear force and a tenderness score evaluatedby trained sensory panels. All the SNP were informativein the 3 breeds. Associations of individual markersor haplotypes with traits were analyzed. The resultsdiffered in the 3 breeds. The G allele of a CAST marker(position 97574679 on Btau4.0) was found to exert a significanteffect on the shear force (+0.18 phenotypic SD;RSD) and tenderness score (−0.22 RSD) in the Blonded’Aquitaine breed. In the same breed, this marker wasassociated with another CAST SNP (position 97576054on Btau4.0) such that the GA haplotype appeared tobe associated with tougher meat. Two CAPN1 markers(positions 45221250 and 45241089 on Btau4.0) had asignificant effect on both traits in the Charolais breed(from |0.11| to |0.25| RSD). In the same breed, thesemarkers were associated with another CAPN1 SNP(position 45219395 on Btau4.0) such that the ACAand AGG haplotypes appeared to be associated witha tender meat and a tougher meat, respectively. Consequently,the present results indicate that the effectsof the markers studied are breed-specific and cannot beextended to all Bos taurus breeds. Further studies arealso required to identify other more appropriate markersfor French beef breeds.
Tipo:  Journal Article
Idioma:  Inglês
Fonte:  Journal of Animal Science. 2011, 89 : 1–11

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