Efeitos da heterogeneidade de variância residual entre grupos de contemporâneos na avaliação genética de bovinos de corte

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversity of Guelph-
Autor(es): dc.creatorCarvalheiro, Roberto-
Autor(es): dc.creatorFries, Luiz Alberto-
Autor(es): dc.creatorSchenkel, Flávio Schramm-
Autor(es): dc.creatorDe Albuquerque, Lucia Galvão-
Data de aceite: dc.date.accessioned2025-08-21T20:00:38Z-
Data de disponibilização: dc.date.available2025-08-21T20:00:38Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2002-07-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/224405-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/224405-
Descrição: dc.descriptionThe objective of this study was to investigate, via simulated data, the effect of heterogeneity of residual variance among contemporary groups (CG) on genetic evaluation of beef cattle, and to compare a weighted genetic evaluation procedure (R≠Iσe2) with one that assumes homogeneity of variances (R = Iσe2). Different data sets of postweaning weight gain, adjusted to 345 days, were simulated with and without heterogeneity of residual variance, using a phenotypic variance of 300 kg2 and a true heritability of 0.4. A real data set was used to provide the CG and parents related to each animal observation. Results showed that, when high levels of heterogeneity of residual variance were considered, animals were selected from CG with higher variability, especially with intense selection. With respect to prediction consistency, non parent animals and cows had their predicted breeding values more affected by heterogeneity of residual variance than sires. The weighed factor used reduced, but did not eliminate, the effect of heterogeneity of residual variance. The results of weighted genetic evaluations were similar or superior to those from evaluations that assumed homogeneity of variances. Even when the variances were homogeneous, the weighed genetic evaluations yielded results that were not inferior than those from the usual evaluations, which assumed homogeneity of variances.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionZootecnia DZ-FCAV-UNESP Bolsista FAPESP, Jaboticabal, SP-
Descrição: dc.descriptionUniversity of Guelph, Guelph, Ont.-
Descrição: dc.descriptionDZ-FCAV-UNESP Bolsista CNPq, Jaboticabal, SP-
Descrição: dc.descriptionZootecnia DZ-FCAV-UNESP Bolsista FAPESP, Jaboticabal, SP-
Descrição: dc.descriptionDZ-FCAV-UNESP Bolsista CNPq, Jaboticabal, SP-
Formato: dc.format1680-1688-
Idioma: dc.languagept_BR-
Relação: dc.relationRevista Brasileira de Zootecnia-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAccuracy-
Palavras-chave: dc.subjectConsistency-
Palavras-chave: dc.subjectSimulation-
Palavras-chave: dc.subjectWeighed estimate-
Título: dc.titleEfeitos da heterogeneidade de variância residual entre grupos de contemporâneos na avaliação genética de bovinos de corte-
Título: dc.titleEffects of heterogeneity of residual variance among contemporary groups on genetic evaluation of beef cattle-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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