Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1053117
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dc.contributor.authorMAGNABOSCO, C. de U.pt_BR
dc.contributor.authorLOPES, F. B.pt_BR
dc.contributor.authorROSA, G. J. de M.pt_BR
dc.contributor.authorSAINZ, R. D.eng
dc.date.accessioned2016-09-20T11:11:11Zpt_BR
dc.date.available2016-09-20T11:11:11Zpt_BR
dc.date.created2016-09-20pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationRevista Colombiana de Ciencias Pecuarias, v. 29, p. 119-129, 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1053117pt_BR
dc.descriptionBackground: Nellore cows are well adapted to tropical conditions, and they have good maternal ability as well as long and prolific reproductive life. Objective: to estimate (co)variances and genetic parameters for calving interval (CI), age at first calving (AFC), gestation length (GL), and days open (DO) in Nellore cows. Methods: covariance components and genetic parameters were estimated using multi-trait Bayesian procedures. Results: three traits had low but statistically significant heritabilities, averaging 0.05, 0.10, and 0.04 for CI, GL, and DO, respectively, whereas age at first calving had a higher heritability (0.36). The permanent environmental effects for CI, GL, and DO were also low, averaging 0.08, 0.07, and 0.15, respectively. The genetic correlations between AFC and CI, AFC and GL, AFC and DO, GL and CI, CI and DO, GL and DO were 0.20, 0.12, 0.11, 0.02, 0.92, and -0.21, respectively. Selection for shorter CI would contribute towards decreasing DO. However, selection for decreased GL could result in a greater number of DO. Despite the favorable genetic correlations, the direct selection responses for these traits would be low. Conclusion: reproductive traits are strongly influenced by environmental effects. Changes in management and environmental factors could rapidly improve reproductive performance of Polled Nellore herds. Genetic selection for these traits should produce a much slower but permanent response.eng
dc.language.isoengpt_BR
dc.rightsopenAccesspt_BR
dc.subjectBovino de Cortept_BR
dc.titleBayesian estimates of genetic parameters for reproductive traits in Nellore cows raised on pasture in tropical regions.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-02-08T11:11:11Zpt_BR
dc.subject.thesagroGado de cortept_BR
dc.subject.thesagroGado nelorept_BR
dc.subject.thesagroFertilidadept_BR
dc.subject.thesagroEficiência reprodutivapt_BR
dc.subject.thesagroMelhoramento animalpt_BR
dc.subject.thesagroGado zebupt_BR
dc.subject.nalthesaurusBeef cattleeng
dc.subject.nalthesaurusReproductive efficiencyeng
dc.subject.nalthesaurusAnimal breedingeng
dc.subject.nalthesaurusZebueng
dc.format.extent2p. 119-129pt_BR
riaa.ainfo.id1053117pt_BR
riaa.ainfo.lastupdate2017-02-08pt_BR
dc.contributor.institutionCLAUDIO DE ULHOA MAGNABOSCO, CPACpt_BR
dc.contributor.institutionFERNANDO BRITO LOPES, UNIVERSITY OF WISCONSINeng
dc.contributor.institutionGUILHERME JORDÃO DE MAGALHAES ROSA, UNIVERSITY OF WISCONSINeng
dc.contributor.institutionROBERTO DANIEL SAINZ GONZALEZ, CPAC.eng
Appears in Collections:Artigo em periódico indexado (CPAC)

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