Showing results 41 to 60 of 125
  Alternative modelling of body condition score from Walloon Holstein cows to develop management toolsBastin, Catherine  ; ; Gillon, Alain et alConference (2008, June) Detailed reference viewed: 4 (2 ULg)Predicting bovine milk urea concentration for future test-day records in a management perspectiveBastin, Catherine ; ; et alConference (2008, April 02) Detailed reference viewed: 7 (1 ULg) Facteurs de risque liés à l’apparition des mammites chez la vache laitièreHanzen, Christian ; Humblet, Marie-France ; Theron, Léonard et alConference (2008, February 15) Detailed reference viewed: 37 (7 ULg)OptiVal: Vers de nouveaux outils de gestion pour les éleveurs laitiers wallons, Prédire la réussite à l’insémination; Bastin, Catherine ; et alPoster (2008, January 23) Detailed reference viewed: 3 (2 ULg) Variabilité génétique des composés 'Santé' du lait prédits par la spectrométrie du moyen-infrarougeSoyeurt, Hélène ; ; et alin 13ième Carrefour des Productions Animales: L'Elevage des ruminants en question: vérités et contre-vérités (2008) Detailed reference viewed: 27 (6 ULg)OptiVal Projet d'optimisation des valorisations issues des données du contrôle des performances; Rapport final, mars 2008; Bastin, Catherine ; Gillon, Alain et alReport (2008) Detailed reference viewed: 17 (3 ULg) Predicting bovine milk urea concentration for future test-day records in a management perspectiveBastin, Catherine ; ; et alin Proceedings of the British Society of Animal Science (2008) Detailed reference viewed: 28 (12 ULg)OptiVal: Vers de nouveaux outils de gestion pour les éleveurs laitiers wallons, Prédire la réussite à l’insémination; Bastin, Catherine ; et alin 13ième Carrefour des Productions animales: L'Elevage des ruminants en question: vérités et contre-vérités: Gembloux, le 23 janvier 2008 (2008) Detailed reference viewed: 22 (3 ULg)Alternative modelling of body condition score from Walloon Holstein cows to develop management toolsBastin, Catherine ; ; Gillon, Alain et alin Proceedings ICAR 36th Session (2008) Detailed reference viewed: 28 (15 ULg)First results of body condition score modeling for Walloon Holstein cowsBastin, Catherine ; ; Gillon, Alain et alConference (2007, August 25) Detailed reference viewed: 8 (4 ULg)First steps to model milk urea in a management perspectiveBastin, Catherine ; Gillon, Alain ; et alConference (2007, July) Detailed reference viewed: 2 (1 ULg)Genetic variability of lactoferrin content predicted by MIR SpectrometrySoyeurt, Hélène ; Colinet, Frédéric ; Arnould, Valérie et alConference (2007, February 18) Detailed reference viewed: 24 (6 ULg)Produire de la viande et du lait avec la Blanc-Bleu Belge de type mixteBastin, Catherine ; ; et alin 12ième Carrefour des Productions animales: Le marché de la viande bovine, enjeux et perspectives: Gembloux, le 24 janvier 2007 (2007, January 24) Detailed reference viewed: 35 (16 ULg)Produire de la viande et du lait avec la Blanc-Bleu Belge de type mixteBastin, Catherine ; ; et alPoster (2007, January 24) Detailed reference viewed: 15 (6 ULg)Genetic Parameters of Butter Hardness Estimated by Test-Day ModelSoyeurt, Hélène ; ; et alin Interbull Bulletin (2007), 37 Detailed reference viewed: 25 (2 ULg)Genetic variability of lactoferrin content estimated by mid-infrared spectrometry in bovine milkSoyeurt, Hélène ; Colinet, Frédéric ; Arnould, Valérie et alin Journal of Dairy Science (2007), 90(9), 4443-4450 The effects of lactoferrin (LF) on the immune system have already been shown by many studies. Unfortunately, the current methods used to measure LF levels in milk do not permit the study of the genetic ... [more ▼] The effects of lactoferrin (LF) on the immune system have already been shown by many studies. Unfortunately, the current methods used to measure LF levels in milk do not permit the study of the genetic variability of lactoferrin or the performance of routine genetic evaluations. The first aim of this research was to derive a calibration equation permitting the prediction of LF in milk by mid-infrared spectrometry (MIR). The calibration with partial least squares on 69 samples showed a ratio of standard error of cross-validation to standard deviation equal to 1.98. Based on this value, the calibration equation was used to establish an LF indicator trait (predicted LF; pLF) on a large number of milk samples (n = 7,690). A subsequent study of its variability was conducted, which confirmed that stage of lactation and lactation number influence the overall pLF level. Small differences in mean pLF among 7 dairy breeds were also observed. The pLF content of Jersey milk was significantly higher than that in Holstein milk. Therefore, the choice of breed could change the expected LF level. Heritability estimated for pLF was 19.7%. The genetic and phenotypic correlations between somatic cell score and pLF were 0.04 and 0.26, respectively. As somatic cell score increases in presence of mastitis, this observation seems to indicate that pLF, or a function of observed pLF, compared with expected LF might have potential as an indicator of mastitis. The negative genetic correlation (−0.36) between milk yield and pLF could indicate an undesirable effect of selection for high milk production on the overall LF level. [less ▲] Detailed reference viewed: 46 (9 ULg)Estimation of heritability and genetic correlations for the major fatty acids in bovine milkSoyeurt, Hélène ; Gillon, Alain ; Vanderick, Sylvie et alin Journal of Dairy Science (2007), 90(9), 4435-4442 The current cattle selection program for dairy cattle in the Walloon region of Belgium does not consider the relative content of the different fatty acids (FA) in milk. However, interest by the local ... [more ▼] The current cattle selection program for dairy cattle in the Walloon region of Belgium does not consider the relative content of the different fatty acids (FA) in milk. However, interest by the local dairy industry in differentiated milk products is increasing. Therefore, farmers may be interested in selecting their animals based on the fat composition. The aim of this study was to evaluate the feasibility of genetic selection to improve the nutritional quality of bovine milk fat. The heritabilities and correlations among milk yield, fat, protein, and major FA contents in milk were estimated. Heritabilities for FA in milk and fat ranged from 5 to 38%. The genetic correlations estimated among FA reflected the common origin of several groups of FA. Given these results, an index including FA contents with the similar metabolic process of production in the mammary gland could be used, for example, to increase the monounsaturated and conjugated fatty acids in milk. Moreover, the genetic correlations between the percentage of fat and the content of C14:0, C12:0, C16:0, and C18:0 in fat were −0.06, 0.55, 0.60, and 0.84, respectively. This result demonstrates that an increase in fat content is not directly correlated with undesirable changes in FA profile in milk for human health. Based on the obtained genetic parameters, a future selection program to improve the FA composition of milk fat could be initiated. [less ▲] Detailed reference viewed: 25 (11 ULg)First results of body condition score modeling for Walloon Holstein cowsBastin, Catherine ; ; Gillon, Alain et alin Interbull Bulletin (2007), 37 Detailed reference viewed: 31 (17 ULg)Genetic parameters of the major fatty acid (FA) contents in cow milkSoyeurt, Hélène ; Gillon, Alain ; Vanderick, Sylvie et alPoster (2007) Detailed reference viewed: 11 (5 ULg)Genetic parameters of the major fatty acid (FA) contents in cow milkSoyeurt, Hélène ; Gillon, Alain ; Vanderick, Sylvie et alin Book of Abstracts of the 58th Annual Meeting of the European Association for Animal Production (2007) Detailed reference viewed: 35 (11 ULg) |
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