Data/hora: 11/06/2024 18:52:59

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 07/07/2017
Data da última atualização: | 27/01/2023
Autoria: | PEREZ, B. C.; SILVA, F. F.; BRUNELI, F. A. T.; BALIEIRO, J. C. C.; PEIXOTO, M. G. C. D.
Afiliação: | B. C. Perez, FZEA/USP; F. F. Silva, UFV/VIÇOSA; FRANK ANGELO TOMITA BRUNELI, CNPGL; J. C. C. Balieiro, FMVZ/USP; MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL.
Título: | Count Bayesian models for genetic analysis of in vitro embryo production traits in Guzerá cattle.
Ano de publicação: | 2017
Fonte/Imprenta: | Animal, Feb. 27, 2017.
Páginas: | 9 p.
Idioma: | Inglês
Conteúdo: | Four models for in vitro embryo production traits in Guzerá cattle were compared: Gaussian (untransformed variable ? LIN and transformed in logarithmic scale ? LOG), Poisson (POI) and zero-inflated Poisson (ZIP). Data consisted of 5716 ovum pick-up and in vitro fertilization records performed in 1205 cows from distinct regions of Brazil. Analyzed count traits were the number of viable oocytes (NOV), number of grade I oocytes (NGI), number of degenerated oocytes (NDG), number of cleaved embryos (NCLV) and number of viable produced embryos (NEMB). Heritability varied from 0.17 (LIN) to 0.25 (POI) for NOV; 0.08 (LOG) to 0.18 (ZIP) for NGI; 0.12 (LIN) to 0.20 (POI) for NDG; 0.13 (LIN) to 0.19 (POI) for NCLV; 0.10 (LIN) to 0.20 (POI) for NEMB depending on the considered model. The estimated repeatability varied from 0.53 (LOG) to 0.63 (POI) for NOV; 0.22 (LOG) to 0.39 (ZIP) for NGI; 0.29 (LIN) to 0.42 (ZIP) for NDG; 0.42 (LIN) to 0.59 (POI) for NCLV; 0.36 (LIN) to 0.51 (POI) for NEMB. The goodness of fit, measured by deviance information criterion and mean squared residuals, suggested superiority of POI and ZIP over Gaussian models. Estimated breeding values (EBV) obtained by different models were highly correlated, varying from 0.92 for NOV (between LIN-POI) and 0.99 for NGI (between POI-ZIP). The number of coincident animals on the 10% top EBV showed lower similarities. We recommend POI and ZIP models as the most adequate for genetic analysis of in vitro embryo production traits in Guzerá cattle.
Palavras-Chave: | GLM; Model comparison; Ovum pick-up; Zebu cattle.
Thesaurus Nal: | in vitro fertilization.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (23574-1) - UPC - AP - DD -  -  -  - DIS