Data/hora: 21/06/2024 03:48:52

Biblioteca(s): | Embrapa Pecuária Sudeste.
Tipo da produção científica: | Artigo em Anais de Congresso
Data corrente: | 24/09/2010
Data da última atualização: | 30/08/2013
Autoria: | BARICHELLO, F.; ALENCAR, M. M. de; TORRES JUNIOR, R. A. de A.; SILVA, L. O. C. da.
Afiliação: | FABIANA BARICHELLO, PÓS-DOUTORANDA UNESP/JABOTICABAL; MAURICIO MELLO DE ALENCAR, CPPSE; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; LUIZ OTAVIO CAMPOS DA SILVA, CNPGC.
Título: | Heritability Estimates For Visual Score Data Using Linear And Threshold Models? A Simulation Study.
Ano de publicação: | 2010
Fonte/Imprenta: | In: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 9., 2010, Leipzig. Proceedings... Leipzig: German Society fo Animal Science, 2010.
Descrição Física: | 1 CD-ROM
Idioma: | Português
Conteúdo: | Genetic improvement programs in Brazil involve the monitoring of several traits, such as body structure, precocity, and muscling, which are evaluated using visual scores that have a discrete nature. The systems used to evaluate animals vary in terms of the number of classes, the referential from which the scores are given, and the dispersion of observations in score classes. These traits are usually analyzed as if they were continuous using linear models, a methodology that is not optimal. More adequate methodologies, such as threshold models, have been described for these traits. Another approach to analyze discrete traits is using transformation procedures, which makes the use of a linear model more appealing. The objective in this study was to use simulation in order to evaluate the impact of different forms of assigning visual scores to a continuous trait, genetic parameters, and methodologies of analysis on variance component estimates.
Palavras-Chave: | Analysis on variance; Body structure; Estrutura corporal; Genetic parameters; Precocity.
Thesaurus Nal: | beef cattle.
Categoria do assunto: | --
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (19477-1) - UPC - AA - PP - PROCI-2010.00055 - BAR - 2010.00055 - DIS