Prediction of the androstenone backfat content of boar carcasses from sexual development indicators | Prédiction de la teneur en androsténone du gras dorsal des carcasses de verrats à partir d'indicateurs du développement sexuel
2016
Prunier, Armelle | Parois, Séverine | Faouen, Anaëlle | Larzul, Catherine | Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE) ; Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST | Génétique Physiologie et Systèmes d'Elevage (GenPhySE) ; Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-École nationale supérieure agronomique de Toulouse (ENSAT) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)
National audience
Показать больше [+] Меньше [-]Английский. Predicting fat androstenone content using a rapid and cheap method applied to live pigs is needed for efficient genetic selection against boar taint. Piétrain x (Large White x Landrace) boars (n = 90) were slaughtered either at 119 ± 4 kg live weight and 168 ± 1 days of age (S1) or at 116 ± 4 kg and 174 ± 1 days (S2). Blood and saliva samples were collected on D0 (S1: 29 days, S2: 35 days before slaughter) and D27 (S1: 2 days, S2: 8 days before slaughter) in order to measure plasma concentrations of oestradiol and testosterone and salivary concentration of oestrone. A backfat sample was collected on live pigs by biopsy on D27 and on carcasses at slaughter. Testes and Cowper glands were weighed at slaughter. Plasma oestradiol and fat androstenone on D27, taken separately, were good predictors of fat androstenone at slaughter (mean R2 between measured and predicted values was 0.48 and 0.43, respectively for each predictor) in S1 pigs. The quality of the prediction decreased between S1 and S2 pigs despite inclusion of salivary oestrone in the equation with oestradiol. To conclude, plasma oestradiol can be considered as a good predictor of fat androstenone at slaughter if the duration between blood collection and slaughter is short.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил Institut national de la recherche agronomique