Estimates of genetic and phenotypic parameters for feeding behaviour and feed efficiency-related traits in Nelore cattle

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorTexas A&M University-
Autor(es): dc.contributorUniversity of California-
Autor(es): dc.contributorNational Association of Breeders and Researchers (ANCP)-
Autor(es): dc.creatorKava, Rafaela-
Autor(es): dc.creatorPeripolli, Elisa-
Autor(es): dc.creatorBrunes, Ludmilla C.-
Autor(es): dc.creatorEspigolan, Rafael-
Autor(es): dc.creatorMendes, Egleu D. M.-
Autor(es): dc.creatorda Silva Neto, João Barbosa-
Autor(es): dc.creatorLondoño-Gil, Marisol-
Autor(es): dc.creatorSainz, Roberto D.-
Autor(es): dc.creatorLobo, Raysildo B.-
Autor(es): dc.creatorBaldi, Fernando-
Data de aceite: dc.date.accessioned2025-08-21T20:54:08Z-
Data de disponibilização: dc.date.available2025-08-21T20:54:08Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-05-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1111/jbg.12756-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246647-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246647-
Descrição: dc.descriptionThe objective of this study was to obtain (co)variance components, heritability, and genetic and phenotypic correlation estimates for feed efficiency and feed behaviour-related indicator traits. Further, it aimed to predict the direct and correlated responses for feed efficiency traits when selection was applied for feeding behaviour-related traits in Nelore cattle. Phenotypic records (n = 4840) from 125 feed efficiency tests (RFI: Residual feed intake and DMI: Dry matter intake) carried out between 2011 and 2018 were considered in this study. Animals belonged to five farms located in two Brazilian geographical regions (Midwest and Southeast). Animals under similar management and environmental conditions in the feedlot were evaluated when they attained an average of 13.5 ± 4.15 months of age. Feed behaviour-related traits were also obtained, including meal criteria (MC), meal frequency (MF), average meal duration (AMD), meal duration (MD), average consumption per meal (ACM), and consumption rate (CR) through the GrowSafe System® electronic bunk system. The contemporary groups for all traits were composed of farm, management group, feed efficiency test, sex, and birth year. The (co)variance components were estimated using the restricted maximum likelihood method considering a multi-trait (n = 8) animal model. The heritability estimates for RFI (0.23 ± 0.02), DMI (0.31 ± 0.02), MF (0.65 ± 0.02), AMD (0.29 ± 0.02), ACM (0.24 ± 0.02), MD (0.41 ± 0.02), MC (0.48 ± 0.02), and CR (0.42 ± 0.02) were moderate to high. The highest genetic correlation was obtained between CR and MD (−0.91 ± 0.04), MD and AMD (0.73 ± 0.03), CR and AMD (−0.68 ± 0.04), and RFI and DMI (0.81 ± 0.02). The highest phenotypic correlation was between ACM and AMD (0.76 ± 0.02), DMI and MD (0.77 ± 0.02), and DMI and RFI (0.77 ± 0.02). Genetic improvement for feed efficiency and feeding behaviour-related traits is feasible and the results obtained herein provided valuable information regarding the genetic background of Nelore feeding behaviour-related traits. The genetic association between feeding behaviour and feed efficiency-related traits suggested that animals spending less time feeding at a low feeding rate also had lower DMI and higher feed efficiency (RFI), and likely had lower energy maintenance requirements. The relative efficiency of selection showed that feeding behaviour-related traits were not adequate indicator traits to improve RFI and DMI. The DMI might be an effective selection criterion to improve RFI and reduce the herd's maintenance requirements.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Animal Science São Paulo State University –Júlio de Mesquita Filho (UNESP) Prof. Paulo Donato Castelane-
Descrição: dc.descriptionDepartment of Veterinary Medicine Faculty of Animal Science and Food Engineering University of Sao Paulo-
Descrição: dc.descriptionEmbrapa Rice and Beans-
Descrição: dc.descriptionDepartment of Animal Science Texas A&M University-
Descrição: dc.descriptionDepartment of Animal Science University of California-
Descrição: dc.descriptionNational Association of Breeders and Researchers (ANCP)-
Descrição: dc.descriptionDepartment of Animal Science São Paulo State University –Júlio de Mesquita Filho (UNESP) Prof. Paulo Donato Castelane-
Formato: dc.format264-275-
Idioma: dc.languageen-
Relação: dc.relationJournal of Animal Breeding and Genetics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectgenetic correlation-
Palavras-chave: dc.subjectheritability-
Palavras-chave: dc.subjectphenotypic correlation-
Palavras-chave: dc.subjectresidual feed intake-
Palavras-chave: dc.subjectzebu cattle-
Título: dc.titleEstimates of genetic and phenotypic parameters for feeding behaviour and feed efficiency-related traits in Nelore cattle-
Tipo de arquivo: dc.typelivro digital-
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