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Est-il possible de piloter conjointement les qualités de la carcasse et de la bavette de flanchet par les pratiques d’élevage, chez la génisse de race Charolaise en finition ?

Abstract : The aims of this study were to identify breeding practices during the fattening period that have the highest influence on carcass and beef meat sensory qualities in order to pilot simultaneously these two qualities, in Charolais heifers. One difficulty is that breeding practice is a combination of different livestock factor combinations. This study was performed on individual data from 111 heifers, during the fattening period. Available data concern livestock data (p=12), carcass characteristics (p=6) and flank steak (Rectus Abdominis) sensory proprieties. Four clusters representing four different breeding practices(J_leg, Fini_long, A_lourde and Conc_leg), were identified from two hierarchical ascendant classifications (HAC) established on quantitative (p=7) and qualitative (p=5) breeding data. These four clusters represent four different breeding practices. J_leg cluster (n=29) was mainly characterized by young slaughtered heifers (27.8 months), lightweight (635 kg) and low quantities of concentrates (CONC), UFL and PDI intake. Diet tended to be mainly based on hay. Fini_long cluster (n=26) was characterized by a long fattening period duration (220 days), heavier slaughtered heifers (700 kg) and low CONC, UFL and PDI intake. This cluster was also characterized by fattening grazing. A_lourde cluster (n=32) was characterized by older (36.3 months) and heavier (726 kg) slaughtered heifers. Fattening housing and diet with silage and/or straw characterized this breeding practice. Finally, the Conc_leg cluster (n=24) was characterized by lightweight slaughtered heifers (661 kg) and high CONC, UFL and PDI intake. The effects of the different breeding practice cluster on carcass characteristics and flank steak sensory properties were estimated by analysis of variance. Higher carcass quality was reached by breeding practice of the A_lourde cluster according to remuneration criteria (weight, conformation and fattening carcass) of the farmer. The breeding practice of the J_leg cluster enabled higher flank steak sensory properties. These two antagonist breeding practices show that it is difficult to simultaneously pilot carcass and beef meat quality, among Charolais heifers. During the fattening period, compromises should be found to avoid favoring one of these two qualities.
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https://hal.inrae.fr/hal-02741643
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Submitted on : Wednesday, June 3, 2020 - 2:00:06 AM
Last modification on : Monday, April 12, 2021 - 4:16:02 PM

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  • HAL Id : hal-02741643, version 1
  • PRODINRA : 308222

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Julien Soulat, Valérie Monteils, Stéphanie Leger, Marie-Pierre Ellies-Oury, Brigitte Picard. Est-il possible de piloter conjointement les qualités de la carcasse et de la bavette de flanchet par les pratiques d’élevage, chez la génisse de race Charolaise en finition ?. 22. Rencontres autour des Recherches sur les Ruminants, Dec 2015, Paris, France. ⟨hal-02741643⟩

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