Application of reactions norms in study of genotype environmental interaction for milk yield of buffaloes

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorTonhati, Humberto-
Autor(es): dc.creatorAspilcueta-Borquis, Rusbel Raul-
Autor(es): dc.creatorde Freitas, Ana Claudia-
Autor(es): dc.creatorde Camargo, Gregório Miguel Ferreira-
Autor(es): dc.creatorBaldi, Fernando-
Data de aceite: dc.date.accessioned2025-08-21T22:10:27Z-
Data de disponibilização: dc.date.available2025-08-21T22:10:27Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2013-12-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/232266-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/232266-
Descrição: dc.descriptionThe 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.-
Descrição: dc.descriptionState University of São Paulo Jaboticabal, (UNESP), 14884900, SP-
Descrição: dc.descriptionState University of São Paulo Jaboticabal, (UNESP), 14884900, SP-
Formato: dc.format662-665-
Idioma: dc.languageen-
Relação: dc.relationBuffalo Bulletin-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectEnvironment gradient-
Palavras-chave: dc.subjectLegendre-
Palavras-chave: dc.subjectRandom regression-
Título: dc.titleApplication of reactions norms in study of genotype environmental interaction for milk yield of buffaloes-
Tipo de arquivo: dc.typeaula digital-
Aparece nas coleções:Repositório Institucional - Unesp

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