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dc.contributor.authorNEGREIROS, M. P. M. de
dc.contributor.authorAMORIM, S. T.
dc.contributor.authorLÔBO, R. B.
dc.contributor.authorBRUNES, L. C.
dc.contributor.authorMAGNABOSCO, C. de U.
dc.contributor.authorBERGMANN, J. A. G.
dc.contributor.authorESPIGOLAN, R.
dc.contributor.authorPEREIRA, A. S. C.
dc.contributor.authorBALDI, F.
dc.date.accessioned2025-01-29T17:47:15Z-
dc.date.available2025-01-29T17:47:15Z-
dc.date.created2025-01-29
dc.date.issued2023
dc.identifier.citationJournal of Animal Breeding Genetics, v. 141, p. 473–484, 2023.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1172071-
dc.descriptionThis study aimed to estimate (co)variance components and genetic parameters for calving ease (CE) and their genetic correlations with growth, reproductive, carcass, and feed efficiency traits in Nellore cattle. Phenotypes for CE are scored in two categories: normal calving and assisted calving. The traits considered were probability of precocious calving, age at first calving, stayability, adjusted scrotal circumference at 365 days of age, accumulated cow productivity, age at puberty of males, gestation length, birth weight, adjusted weights at 210 and 450 days of age, adult cow weight, frame score, hip height, rib eye area, subcutaneous backfat thickness, rump fat thickness, intramuscular fat percentage, residual feed intake and dry matter intake. The estimation of genetic parameters was performed using a two-trait threshold-linear animal model, except for CE, stayability, and probability of precocious calving, which were evaluated through a two-trait threshold animal model. The direct (0.27) and maternal (0.19) heritability estimates for CE in heifers primiparous Nellore indicated that selecting for this trait is feasible. The selection to improve the female sexual precocity should consider CE during the selection and mating decisions to reduce calving problems. Genetic correlation estimates between CE and BW suggest that selecting low birth weight to reduce calving problems is not an appropriate strategy to improve calving ease in heifers Nellore. Therefore, adopting a multi-trait selection model with CE and BW in the Nellore breed would reduce calving difficulties, particularly in sexually precocious heifers, without impairing the growth, reproductive, feed efficiency conversion, and carcass indicator traits.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectPrecocidade sexual
dc.titleGenetic correlation estimates between calving ease in primiparous cows and economically important traits in Nellore cattle.
dc.typeArtigo de periódico
dc.subject.thesagroGado Nelore
dc.subject.thesagroBovinocultura
dc.subject.thesagroBovino
dc.subject.thesagroGado de Corte
dc.subject.thesagroGenética Animal
riaa.ainfo.id1172071
riaa.ainfo.lastupdate2025-01-29
dc.contributor.institutionMARIA PAULA MARINHO DE NEGREIROS, UNIVERSIDADE DE SÃO PAULO; SABRINA THAISE AMORIM, VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY; RAYSILDO BARBOSA LÔBO, ASSOCIAÇÃO NACIONAL DE CRIADORES E PESQUISADORES; LUDMILLA COSTA BRUNES; CLAUDIO ULHOA MAGNABOSCO, CPAC; JOSÉ AURÉLIO GARCIA BERGMANN, UNIVERSIDADE FEDERAL DE MINAS GERAIS; RAFAEL ESPIGOLAN, UNIVERSIDADE FEDERAL DE SANTA MARIA; ANGELICA SIMONE CRAVO PEREIRA, UNIVERSIDADE DE SÃO PAULO; FERNANDO BALDI, UNIVERSIDADE ESTADUAL PAULISTA.
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