Genetic (co)variance components for ratio of lamb weight to ewe metabolic weight as an indicator of ewe efficiency

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dc.contributor.authorLôbo, Raimundo Nonato Braga
dc.contributor.authorJúnior, Gerardo Alves Fernandes [UNESP]
dc.contributor.authorLôbo, Ana Maria Bezerra Oliveira
dc.contributor.authorFacó, Olivardo
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:26:22Z
dc.date.available2014-05-27T11:26:22Z
dc.date.issued2012-02-01
dc.description.abstractData from a multibreed commercial flock located at Mid-West of Brazil, supported by Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC), were used to estimate genetic parameters of traits related to ewe productivity by Average Information Restricted Maximum Likelihood method applied to an animal model. The analyzed traits were litter weight at birth (LWB) and at weaning (LWW), ewe weight at weaning (EW) and ewe production efficiency, estimated by WEE=LWW/EW 0.75. The heritabilities were 0.26±0.05, 0.32±0.06, 0.37±0.03 and 0.10±0.02 for LWB, LWW, EW and WEE, respectively. Significant effects for direct heterosis were observed for LWW and EW. Recombination losses were important for EW and WEE. Genetic correlations of LWB with LWW, EW and WEE were 0.68, 0.37 and 0.15, respectively; of LWW with EW and WEE were 0.30 and 0.34, respectively; and between EW and WEE was -0.25. Even though it is a low heritability trait, WEE can be indicated as a selection criteria for improving the ewe productivity without increasing the mature weight of animals due to its genetic correlations with LWW and other traits. © 2011 Elsevier B.V.en
dc.description.affiliationBrazilian Agricultural Research Corporation EMBRAPA/National Goats and Sheep Research Center CNPCO
dc.description.affiliationFCAV UNESP, Campus de Jaboticabal
dc.description.affiliationUnespFCAV UNESP, Campus de Jaboticabal
dc.format.extent214-219
dc.identifierhttp://dx.doi.org/10.1016/j.livsci.2011.09.014
dc.identifier.citationLivestock Science, v. 143, n. 2-3, p. 214-219, 2012.
dc.identifier.doi10.1016/j.livsci.2011.09.014
dc.identifier.file2-s2.0-84855782541.pdf
dc.identifier.issn1871-1413
dc.identifier.scopus2-s2.0-84855782541
dc.identifier.urihttp://hdl.handle.net/11449/73174
dc.language.isoeng
dc.relation.ispartofLivestock Science
dc.relation.ispartofjcr1.204
dc.relation.ispartofsjr0,730
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGenetic correlation
dc.subjectHeritability
dc.subjectMultibreed flock
dc.subjectNon-additive effects
dc.subjectSheep
dc.subjectAnimalia
dc.subjectOvis aries
dc.titleGenetic (co)variance components for ratio of lamb weight to ewe metabolic weight as an indicator of ewe efficiencyen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy

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