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dc.contributor.authorCARVALHO, N. S.
dc.contributor.authorDALTRO, D. S.
dc.contributor.authorMACHADO, J. D.
dc.contributor.authorCAMARGO, E. V.
dc.contributor.authorPANETTO, J. C. do C.
dc.contributor.authorCOBUCI, J. A.
dc.identifier.citationArquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 73, n. 4, p. 938-948, 2021.
dc.descriptionThe objective of this study was to estimate genetic parameters and genetic trends of different conformation and management traits regularly measured within the context of the National Dairy Gir Breeding Program (PNMGL). The estimation of genetic and residual variances for each trait was performed using average information restricted maximum likelihood (AI-REML) procedure in AIREMLF90 program software. The population was divided into three subpopulations constituted by measured females (with phenotype records), all females, and males. Linear regressions were applied for each trait, considering two periods of birth (1st period: 1938-1996; 2nd period: 1997-2012). The estimated heritability of conformation and management traits varied from 0.01 to 0.53, denoting a perspective of genetic improvement through selection and corrective matings for purebred Dairy Gir populations. The average genetic changes in conformation and management traits were, in general, variable and inexpressive, showing that the selection of Dairy Gir may have had been directed essentially to increase milk yield. The analysis of the two periods of birth indicated that some linear traits present progress (although inexpressive) in the 2nd period (more recent period).
dc.subjectProgresso genético
dc.subjectGenetic progress
dc.titleGenetic parameters and genetic trends of conformation and management traits in Dairy Gir cattle.
dc.typeArtigo de periódico
dc.subject.thesagroMelhoramento Genético Animal
dc.subject.thesagroGado Zebu
dc.subject.thesagroBos Taurus
dc.subject.thesagroTeste de Progênie
dc.subject.nalthesaurusProgeny testing
dc.contributor.institutionUniversidade Federal do Rio Grande do Sul
dc.contributor.institutionUniversidade Federal do Rio Grande do Suleng
dc.contributor.institutionUniversidade Federal do Rio Grande do Suleng
dc.contributor.institutionInstituto Federal de Educação ˗ Ciência e Tecnologia Farroupilhaeng
dc.contributor.institutionJOAO CLAUDIO DO CARMO PANETTO, CNPGLeng
dc.contributor.institutionUniversidade Federal do Rio Grande do Sul.eng
Appears in Collections:Artigo em periódico indexado (CNPGL)

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