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7 août 2011
- handle: 10670/1.6j9iny
- hal: hal-02744388
- PRODINRA: 49612
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Muscle Musculature Myodynamics MyologyCiter ce document
Catherine C. Jurie et al., « Muscle characteristics from young bulls of different beef breeds », HALSHS : archive ouverte en Sciences de l’Homme et de la Société, ID : 10670/1.6j9iny
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In the framework of the EU ProSafeBeef project, the aim was to determine (1) the contractile and metabolic properties and (2) the total and insoluble collagen contents of two muscles Longissimus thoracis (LT) and Semitendinosus (ST) of 74 young bulls from three breeds: Aberdeen Angus (AA), Limousine (Li), Blonde d’Aquitaine (BA) slaughtered at 17 months of age. Activities of glycolytic (Lactate dehydrogenase, LDH) and oxidative enzymes (Isocitrate dehydrogenase, ICDH; Citrate synthase, CS; Cytochrome-c oxidase, COX) were measured. Contractile properties were determined by electrophoretic separation and densitometric quantification of the proportions of the different myosin heavy chain (MyHC) isoforms. All the data were analyzed by using GLM procedure of SAS. The results demonstrated that muscles from AA bulls have a higher oxidative metabolism (ICDH and COX) associated with a higher proportion of MyHC I and IIa (P