Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/917436
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dc.contributor.authorMATTAR, M.pt_BR
dc.contributor.authorSILVA, L. O. C. dapt_BR
dc.contributor.authorALENCAR, M. M. dept_BR
dc.contributor.authorCARDOSO, F. F.pt_BR
dc.date.accessioned2012-03-05T11:11:11Zpt_BR
dc.date.accessioned2012-03-05T11:11:11Zpt_BR
dc.date.available2012-03-05T11:11:11Zpt_BR
dc.date.available2012-03-05T11:11:11Zpt_BR
dc.date.created2012-03-05pt_BR
dc.date.issued2011pt_BR
dc.identifier.citationJournal of Animal Science, v. 89, p. 2349-2355, 2011.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/917436pt_BR
dc.descriptionThe objective of this study was to investigate the presence of genotype × environment interactions (G×E) for long-yearling weight in Canchim cattle (5/8 Charolais + 3/8 zebu) in Brazil using reaction norms (RN). The hierarchical RN model included the fixed effect of age of the animal (linear coefficient) and random effects of contemporary groups and additive animal genetic intercept and slope of the RN and contemporary group effects as random effects. Contemporary groups as the most elemental representation of management conditions in beef cattle were chosen to represent the environmental covariate of the RN. The deviance information criteria demonstrated that a homoskedastic residual RN model provided a better data fit compared with a heteroskedastic counterpart and with a traditional animal model, which had the worst fit. The environmental gradient for long-yearling weight based on contemporary group effects ranged from ?105 to 150 kg. The additive direct variance and heritability estimates increased with increasing environmental gradient from 74.33 ± 22.32 to 1,922.59 ± 258.99 kg2 and from 0.08 ± 0.02 to 0.68 ± 0.03, respectively. The high genetic correlation (0.90 ± 0.03) between the intercept and the slope of the RN shows that animals with the greatest breeding values best responded to environmental improvement, characterizing scale effect as the source of G×E for long-yearling weight. The phenotypic plasticity demonstrated by the slope of the RN of the animal indicates the possibility to change genotype expression along the environmental gradient through selection. The results demonstrate the importance of accounting for G×E in the genetic evaluation of this population.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectGenotypex interactionpt_BR
dc.subjectLong-yearlin weightpt_BR
dc.subjectCanchim cattlept_BR
dc.subjectReaction normpt_BR
dc.titleGenotype × environment interaction for long-yearling weight in Canchim cattle quantified by reaction norm analysis.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2012-03-05T11:11:11Zpt_BR
dc.subject.nalthesaurusbeef cattlept_BR
riaa.ainfo.id917436pt_BR
riaa.ainfo.lastupdate2012-03-05pt_BR
dc.contributor.institutionMAIRA MATTAR, FUNDAÇÃO EDUCACIONAL DE BARRETOS/ BARRETOS; LUIZ OTAVIO CAMPOS DA SILVA, CNPGC; MAURICIO MELLO DE ALENCAR, CPPSE; FERNANDO FLORES CARDOSO, CPPSUL.pt_BR
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