Genetic evaluation of weaning weight and udder score in Nellore cattle

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal de Viçosa (UFV)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.creatorde Oliveira, Matheus Henrique Vargas [UNESP]-
Autor(es): dc.creatorSilva, Josineudson Augusto II de Vasconcelos [UNESP]-
Autor(es): dc.creatorFaria, Ricardo Antônio da Silva [UNESP]-
Autor(es): dc.creatorde Paiva, José Teodoro-
Autor(es): dc.creatorMalheiros, Jessica Moraes-
Autor(es): dc.creatorCorreia, Luiz Eduardo Cruz dos Santos [UNESP]-
Autor(es): dc.creatorAlbuquerque, Lucia Galvão [UNESP]-
Autor(es): dc.creatorGaya, Leila de Genova-
Data de aceite: dc.date.accessioned2022-02-22T00:53:05Z-
Data de disponibilização: dc.date.available2022-02-22T00:53:05Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2021.104400-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/208317-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/208317-
Descrição: dc.descriptionThe aim of this study was to estimate genetic parameters for weaning weight (WW) and udder score (US) of 186,151 Nellore animals raised in extensive systems. The (co)variance components and estimated breeding values (EBVs) were obtained by two-trait analyses using Bayesian inference. The maternal effect (ME) was expressed as the maternal additive genetic variance of the calf's weaning weight (WW). The direct heritabilities were 0.13 ± 0.012 and 0.23 ± 0.012 for WW and US, respectively. The maternal heritability was 0.11 ± 0.012 for WW. The genetic correlations between WW and US (0.48 ± 0.053), WW and ME (0.41 ± 0.067), and US and ME (0.31 ± 0.041) were positive and moderate. Cows with maternal udder scores (US_M) 3 and 4 showed higher EBVs for ME (2.58 ± 0.070 and 2.88 ± 0.214, respectively) and their progeny had higher EBVs for WW (4.58 ± 0.058 and 5.07 ± 0.168) and US (0.20 ± 0.001 and 0.26 ± 0.005). The genetic trends demonstrate genetic progress in the selection program over the years, with values of 0.19 kg and 0.01 points for WW and US, respectively. The genetic trend in ME was 0.04 kg for WW. In addition, a positive genetic correlation was observed between these traits, as well between the traits and ME, i.e., selection would result in positive genetic gains. The use of US_M may help improve body weight and udder quality in the progeny. Furthermore, the trends indicate that the selection adopted on the farms has been effective in promoting genetic progress.-
Descrição: dc.descriptionSão Paulo State University (UNESP) College of Agriculture and Veterinary Science (FCAV)-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Veterinary Medicine and Animal Science (FMVZ)-
Descrição: dc.descriptionFederal University of Viçosa (UFV)-
Descrição: dc.descriptionEmbrapa Southeast Livestock (EMBRAPA)-
Descrição: dc.descriptionFederal University of São João del-Rei (UFSJ)-
Descrição: dc.descriptionSão Paulo State University (UNESP) College of Agriculture and Veterinary Science (FCAV)-
Descrição: dc.descriptionSão Paulo State University (UNESP) School of Veterinary Medicine and Animal Science (FMVZ)-
Idioma: dc.languageen-
Relação: dc.relationLivestock Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBayesian inference-
Palavras-chave: dc.subjectBos taurus indicus-
Palavras-chave: dc.subjectMaternal effect-
Palavras-chave: dc.subjectSelection-
Palavras-chave: dc.subjectVariance components-
Título: dc.titleGenetic evaluation of weaning weight and udder score in Nellore cattle-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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