74987 20200117221657.0 doi 10.1093/jas/sky112 sideral 107523 ART-2018-107523 eng Brito, L.C. Genetic evaluation of age at first calving for Guzerá beef cattle using linear, threshold, and survival Bayesian models 2018 Access copy available to the general public Unrestricted Age at first calving (AFC) is characterized as a censored trait due to missing values provided by recording mistakes and nonoccur-rence or delay in calving communication. In this context, we aimed to compare several statistical methods for genetic evaluation of AFC in Guzerá beef cattle under a Bayesian approach. Seven different methods were used for this purpose. The traditional linear mixed model (LM), which considers only uncensored records; the LM with simulated records (SM), which is based on data augmentation framework; the penalty method, in which a constant of 21 d was added to censored records; the bivariate threshold-linear method considering (TLcens) or not (TLmiss) censored information; and the piecewise Weibull proportional hazards model considering (PWPHcens) or not (PWPH) censored records. Heritability estimates ranged from 0.19 (TLcens) to 0.28 (SM) in non-survival approaches; and 0.40 and 0.46 to PWPH and PWPHcens methods, respectively. In general, breeding values correlations between different methods and the percentage of selected bulls in common indicated reranking, with these correlation ranging from -0.28 (between SM and PWPH) to 0.99 (between TLmiss and LM). The traditional LM, which considers only uncensored records, should be preferred due to its robustness and simplicity. Based on cross-validation analyses, we conclude that the TLmiss could be also a suitable alternative for breeding value prediction, and censored methods did not improve the analysis. info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.697 2018 AGRICULTURE, DAIRY & ANIMAL SCIENCE 16 / 61 = 0.262 2018 Q2 T1 0.871 2018 Animal Science and Zoology 2018 Q1 Medicine (miscellaneous) 2018 Q1 Genetics 2018 Q1 Food Science 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Casellas, J. (orcid)0000-0001-6256-5478 Varona, L. Universidad de Zaragoza Lopes, P.S. Ventura, H.T. Peixoto, M.G.C.D. Lázaro, S.F. Silva, F.F. 1001 420 Universidad de Zaragoza Dpto. Anatom.,Embri.Genét.Ani. Área Genética 96, 7 (2018), 2517-2524 J. anim. sci. JOURNAL OF ANIMAL SCIENCE 0021-8812 153002 http://zaguan.unizar.es/record/74987/files/texto_completo.pdf Versión publicada 123445 http://zaguan.unizar.es/record/74987/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:74987 articulos driver 2020-01-17-22:11:46 ARTICLE