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Poster De Conférence Année : 2012

Détection fine de QTL de tendreté de la viande dans trois races allaitantes françaises

Résumé

Without routine measurement of sensory meat quality traits , breeding companies wonder how to take advantage of the genetic variability of these traits at the molecular level. The projects “Qualvigène” and “Qualvigène + ABQV” were set in to find markers associated to beef quality therefore. A total of 1,059 Charolais, 1,219 Limousin and 947 Blond d’Aquitaine purebred young bulls from respectively 48, 36 and 30 sire families were genotyped with the Illumina Bovine SNP50 ® Beadchip. Two meat tenderness traits were measur ed: shear force and tenderness score. QTLs were detected with a methodology combining linkage disequilibrium and linkage analysis on haplotypes. If we consider the significant positions at the 1‰ threshold and separated by a minimum distance of 4cM, we found about 20 QTLs per trait in each of the three breeds, with a maximum of 35 QTL for shear force in the Blonde d’Aquitaine breed. Some QTL were common across two or three breeds as a QTL of shear force on the chromosome 3 between 16 and 21cM. Most of the other QTLs were breed-specific. The results were also consistent with previous studies of candidate genes (calpastatin and calpain 1 genes).
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Dates et versions

hal-01193865 , version 1 (03-06-2020)

Identifiants

  • HAL Id : hal-01193865 , version 1
  • PRODINRA : 267236

Citer

Sophie Allais, Laurent Journaux, Jacques Lepetit, Sylvie Rousset, Christophe Denoyelle, et al.. Détection fine de QTL de tendreté de la viande dans trois races allaitantes françaises. 14. Journées Sciences du Muscle et Technologies des Viandes, Nov 2012, Caen, France. 2012. ⟨hal-01193865⟩
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