References of "Gengler, Nicolas"
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See detailQualité nutritionnelle du lait - Etude de la variabilité intra- et inter-races du profil en acides gras du lait
Soyeurt, Hélène ULg; Dardenne, Pierre; Gillon, Alain ULg et al

in Le Bulletin (2006), (2), 8-10

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See detailWithin and across breed differences in fatty acids profiles of milk and milk fat
Soyeurt, Hélène ULg; Dardenne, Pierre; Croquet, Coraline et al

in Proceedings of the Bristish Society of Animal Science (2006)

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See detailEstimation of fatty acid profile in cow milk by mid-infrared spectrometry
Soyeurt, Hélène ULg; Dardenne, Pierre; Lognay, Georges ULg et al

in European seminar on infrared spectroscopy (2006)

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See detailWithin and across breeds differences in fatty acids profiles of milk and milk fat in dairy cows.
Soyeurt, Hélène ULg; Dardenne, Pierre; Mayeres, Patrick et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailPotential Estimation of Fatty Acid Content in Cow Milk by Mid-Infrared Spectrometry
Soyeurt, Hélène ULg; Dardenne, Pierre; Lognay, Georges ULg et al

in Prooceedings of the 35th ICAR session (2006)

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See detailGenetic evaluation of female fertility for Walloon dairy and dual purpose cows using a parity random regression model: first results
Mayeres, Patrick; Vanderick, Sylvie ULg; Croquet, Coraline et al

in INTERBULL Bulletin (2006), 34

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See detailIntegration of longevity into the Walloon genetic evaluation system
Vanderick, Sylvie ULg; Croquet, Coraline; Soyeurt, Hélène ULg et al

in Interbull Bulletin (2006), 35

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See detailCorrelations of longevity evaluation with type traits in Walloon Region.
Vanderick, Sylvie ULg; Croquet, Coraline; Mayeres, Patrick et al

in Proceedings of the 8th World Congress on Genetics Applied to LivestockProduction, Belo Horizonte, Minas Gerais, Brazil, 13-18 August, 2006 (2006)

Approximated genetic correlations between direct longevity and type traits were computed for a sire Holstein population. Data were based on results for type traits (77,965 records) and for direct ... [more ▼]

Approximated genetic correlations between direct longevity and type traits were computed for a sire Holstein population. Data were based on results for type traits (77,965 records) and for direct longevity (74,289 records) from the INTERBULL routine run of November 2005. Most of type traits presented a high relationship with direct longevity (from 0.06 up to 0.29). The strongest positive correlation with longevity was for udder depth (0.29) and the strongest negative correlation was for chest depth (-0.21). According the different results, an animal with a good direct longevity seemed to be smaller and less heavy than an animal with a shorter longevity. [less ▲]

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See detailCorrelations of longevity evaluation with type traits in Walloon Region.
Vanderick, Sylvie ULg; Croquet, Coraline; Mayeres, Patrick et al

Poster (2006)

Approximated genetic correlations between direct longevity and type traits were computed for a sire Holstein population. Data were based on results for type traits (77,965 records) and for direct ... [more ▼]

Approximated genetic correlations between direct longevity and type traits were computed for a sire Holstein population. Data were based on results for type traits (77,965 records) and for direct longevity (74,289 records) from the INTERBULL routine run of November 2005. Most of type traits presented a high relationship with direct longevity (from 0.06 up to 0.29). The strongest positive correlation with longevity was for udder depth (0.29) and the strongest negative correlation was for chest depth (-0.21). According the different results, an animal with a good direct longevity seemed to be smaller and less heavy than an animal with a shorter longevity. [less ▲]

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See detailValLait - Perspective d’évolution du contrôle laitier en Wallonie (Belgique)
Abras, Sven; Gillon, Alain ULg; Bertozzi, Carlo et al

in 12ièmes Recontres Recherches Ruminants, Paris, les 7 et 8 Décembre 2005 (2005, December)

ValLait est un projet qui vise à optimaliser les valorisations des données récoltées via le contrôle laitier. Ces valorisations reposent sur une régression multiple (“BP”, pour “Best Prediction”) qui ... [more ▼]

ValLait est un projet qui vise à optimaliser les valorisations des données récoltées via le contrôle laitier. Ces valorisations reposent sur une régression multiple (“BP”, pour “Best Prediction”) qui permet d’estimer les productions journalières de lait, de matières grasses et de protéines d’un animal en se basant sur différents effets comme le stade de lactation, la date de vêlage, les historiques de production du troupeau et de la population... En outre, le modèle BP permet également, dès le début de la lactation d’un animal, de prédire ses productions journalières futures. [less ▲]

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See detailContribution de la biologie moléculaire au progrès de l'élevage.
Renaville, Robert ULg; Georges, Michel ULg; Smal, Caroline et al

Conference (2005, January 26)

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See detailInbreeding depression for global and partial economic indexes, production, type and functional traits in the Walloon Region of Belgium
Croquet, Coraline; Mayeres, Patrick; Gillon, Alain ULg et al

in INTERBULL Bulletin (2005), 33

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See detailAccounting for heterogeneous variances in multi-trait evaluation of Jersey type traits
Gengler, Nicolas ULg; Wiggans, G. R.; Thornton, L. et al

in Journal of Dairy Science (2005), 88(Suppl. 1), 11-11

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See detailStandard errors of solutions in large scale mixed models, application to linear and curvilinear effects of inbreeding on production traits.
Gengler, Nicolas ULg; Croquet, C.

in Journal of Dairy Science (2005), 88(Suppl. 1), 74-74

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See detailLes marqueurs génétiques
Renaville, Robert ULg; Parmentier, Isabelle; Falaki, Mohammed et al

in Thewis, André; Bourbouse, A.; Compère, Roger (Eds.) et al Manuel de zootechnie comparée Nord-Sud (2005)

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See detailAdjustment for heterogeneous covariance due to herd milk yield by transformation of test-day random regressions
Gengler, Nicolas ULg; Wiggans, George; Gillon, Alain ULg

in Journal of Dairy Science (2005), 88

A method of accounting for differences in covariance components of test-day milk records was developed based on transformation of regressions for random effects. Preliminary analysis indicated that ... [more ▼]

A method of accounting for differences in covariance components of test-day milk records was developed based on transformation of regressions for random effects. Preliminary analysis indicated that genetic and nongenetic covariance structures differed by herd milk yield. Differences were found for phenotypic covariances and also for genetic, permanent environmental, and herd-time covariances. Heritabilities for test-day milk yield tended to be lower at the end and especially at the start of lactation; they also were higher (maximum of ∼25%) for high-yield herds and lower (maximum of 15%) for low-yield herds. Permanent environmental variances were on average 10% lower in highyield herds. Relative herd-time variances were ∼10% at start of lactation and then began to decrease regardless of herd yield; high-yield herds increased in midlactation followed by another decrease, and medium-yield herds increased at the end of lactation. Regressors for random regression effects were transformed to adjust for heterogeneity of test-day yield covariances. Some animal reranking occurred because of this transformation of genetic and permanent environmental effects. When genetic correlations between environments were allowed to differ from 1, some additional animal reranking occurred. Correlations of variances of genetic and permanent-environmental regression solutions within herd, test-day, and milking frequency class with class mean milk yields were reduced with adjustment for heterogeneous covariance. The method suggests a number of innovative solutions to issues related to heterogeneous covariance structures, such as adjusted estimates in multibreed evaluation. [less ▲]

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See detailGenetic evaluation of cow survival using a lactation random regression model
Gengler, Nicolas ULg; Vanderick, Sylvie ULg; Mayeres, Patrick et al

in INTERBULL Bulletin (2005), 33

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See detailEvaluations génétiques laitières: changement de base
Félix, Alain; Vanderick, Sylvie ULg; Gengler, Nicolas ULg

Article for general public (2005)

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See detailEstimation of (co)variance components across breeds by a test-day model adapted to New Zealand dairy cattle.
Vanderick, Sylvie ULg; Harris, Bevin; Mayeres, Patrick et al

in Proceedings of the British Society of Animal Science (2005)

Detailed reference viewed: 5 (2 ULg)