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Editing and modeling of milk production data for genetic evaluation of Murrah buffaloes PAB
Souza,Andréa Carolina Santos de; Rezende,Marcos Paulo Gonçalves de; Carneiro,Paulo Luiz Souza; Campos,Bárbara Machado; Malhado,Carlos Henrique Mendes.
Abstract: The objective of this work was to assess the effect of editing and modeling of milk production data for genetic evaluation of Murrah buffaloes. Six strategies for evaluating milk production were analyzed: observed milk production (OMP); adjustment of milk production data to 305 (MP305) and 270 (MP270) days of lactation; removal of the 5 (MP5%) and 10% (MP10%) shortest lactation periods; and milk production along the lactation period as linear covariate (MPCO). Genetic parameters were estimated using the Bayesian inference, with heritability estimates of 0.19 to 0.23 and repeatability estimates of 0.35 to 0.36. Sires classified by OMP were high correlated to those classified by the other models, however, correlations to MP270, MP305 and MPCO...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bubalus bubalis; Lactation period; Genetic parameters; Bull summary.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201261
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Inferences on the effects of selection for feed conversion over meat quality traits in broiler Scientia Agricola
Paiva,José Teodoro de; Mourão,Gerson Barreto; Ferraz,José Bento Sterman; Mattos,Elisângela Chicaroni; Michelan Filho,Tércio; Campos,Bárbara Machado; Eler,Joanir Pereira; Gaya,Leila de Genova.
ABSTRACT: The intense selection process for economic traits conducted by the poultry breeding programs has been caused several changes in broiler meat quality. A database belonging to a selection program of a broiler male line was used to estimate heritability and genetic correlations for feed conversion ratio and meat quality traits, which were: initial and final pH, lightness, drip loss, thawing loss and shear force. Two-trait analyses were performed and the components of co(variance) and genetic parameters were determined using the Bayesian approach and the GIBBS3F90 software. The heritability estimate found for feed conversion ratio (0.52) showed high influence of direct additive genetic effects on the expression of this trait; therefore, this trait is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian inference; Animal breeding; Genetic correlation; Indirect selection.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200129
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