Application of Reactions Norms in Study of Genotype Environmental Interaction for Milk Yield of Buffaloes

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dc.contributor.authorTonhati, Humberto [UNESP]
dc.contributor.authorAspilcueta-Borquis, Rusbel Raul [UNESP]
dc.contributor.authorFreitas, Ana Claudia de [UNESP]
dc.contributor.authorFerreira de Camargo, Gregorio Miguel [UNESP]
dc.contributor.authorBaldi, Fernando [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-12-03T13:09:10Z
dc.date.available2014-12-03T13:09:10Z
dc.date.issued2013-01-01
dc.description.abstractThe aim of this study was to estimate genetic parameters for milk yield (MY) in buffaloes using reaction norms. Model included the additive direct effect as random and contemporary group (herd and year of birth) were included as fixed effects and cow age classes (linear) as covariables. The animal additive direct random effect was modeled through linear Legendre polynomials on environment gradient (EG) standardized means. Mean trends were taken into account by a linear regression on Legendre polynomials of environmental group means. Residual variance was modeled trough 6 heterogeneity classes (EG). These classes of residual variance was formed : EG1: mean = 866,93 kg (621,68 kg-1011,76 kg); EG2: mean = 1193,00 kg (1011,76 kg-1251,49 kg); EG3: mean = 1309,37 kg (1251,49 kg -1393,20 kg); EG4: mean = 1497,59 kg (1393,20 kg-1593,53 kg); EG5: mean = 1664,78 kg (1593,53 kg -1727,32kg) e EG6: mean = 1973,85 kg (1727,32 kg -2422,19 kg).(Co) variance functions were estimated by restricted maximum likelihood (REML) using the GIBBS3F90 package. The heritability estimates for MY raised as the environmental gradient increased, varying from 0.20 to 0.40. However, in intermediate to favorable environments, the heritability estimates obtained with Considerable genotype-environment interaction was found for MY using reaction norms. For genetic evaluation of MY is necessary to consider heterogeneity of variances to model the residual variance.en
dc.description.affiliationState Univ Sao Paulo, Fac Agr & Vet Sci FCAV, BR-14884900 Jaboticabal Unesp, SP, Brazil
dc.description.affiliationUnespState Univ Sao Paulo, Fac Agr & Vet Sci FCAV, BR-14884900 Jaboticabal Unesp, SP, Brazil
dc.format.extent662-665
dc.identifierhttp://ibic.lib.ku.ac.th/e-Bulletin/archive.htm
dc.identifier.citationBuffalo Bulletin. Bangkok: Int Buffalo Information Ctr, v. 32, p. 662-665, 2013.
dc.identifier.issn0125-6726
dc.identifier.lattes7445254960858159
dc.identifier.urihttp://hdl.handle.net/11449/112027
dc.identifier.wosWOS:000331980300083
dc.language.isoeng
dc.publisherInt Buffalo Information Ctr
dc.relation.ispartofBuffalo Bulletin
dc.relation.ispartofjcr0.119
dc.relation.ispartofsjr0,217
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectrandom regressionen
dc.subjectLegendreen
dc.subjectenvironment gradienten
dc.titleApplication of Reactions Norms in Study of Genotype Environmental Interaction for Milk Yield of Buffaloesen
dc.typeArtigo
dcterms.rightsHolderInt Buffalo Information Ctr
unesp.author.lattes7445254960858159
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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