Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 450519
Title Random regression models in the evaluation of the growth curve of Simbrasil beef cattle
Author(s) Mota, M.; Marques, F.A.; Lopes, P.S.; Hidalgo, A.M.
Source Genetics and Molecular Research 12 (2013)1. - ISSN 1676-5680 - p. 528 - 536.
Department(s) WIAS
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) covariance functions - variance-components - genetic-parameters - nellore cattle - birth - cows - traits - weight - age
Abstract Random regression models were used to estimate the types and orders of random effects of (co)variance functions in the description of the growth trajectory of the Simbrasil cattle breed. Records for 7049 animals totaling 18,677 individual weighings were submitted to 15 models from the third to the fifth order including as fixed effects sex, contemporary group, feeding regimen, and type of reproduction and as random effects additive direct genetic effect, animal permanent environment, maternal additive genetic effect, and maternal permanent environment. The best-fit model presented order five to additive direct genetic effect, animal permanent environment, and maternal additive effect, with 6 classes of residual variances, and the maternal permanent environment effect was not significant, likely owing to the low average number of calves per cow. However, the model chosen for the growth curve presents three classes of residual variances, because even not showing the best fit
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