Genetic parameters and genetic trends of conformation and management traits in Dairy Gir cattle.

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dc.contributorUniversidade Federal do Rio Grande do Sul
dc.contributorUniversidade Federal do Rio Grande do Sul
dc.contributorUniversidade Federal do Rio Grande do Sul
dc.contributorInstituto Federal de Educação ˗ Ciência e Tecnologia Farroupilha
dc.contributorJOAO CLAUDIO DO CARMO PANETTO, CNPGL
dc.contributorUniversidade Federal do Rio Grande do Sul.
dc.creatorCARVALHO, N. S.
dc.creatorDALTRO, D. S.
dc.creatorMACHADO, J. D.
dc.creatorCAMARGO, E. V.
dc.creatorPANETTO, J. C. do C.
dc.creatorCOBUCI, J. A.
dc.date2021-09-28T12:00:26Z
dc.date2021-09-28T12:00:26Z
dc.date2021-09-28
dc.date2021
dc.date.accessioned2026-07-07T03:47:52Z
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.identifierArquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 73, n. 4, p. 938-948, 2021.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1134796
dc.identifierhttps://doi.org/10.1590/1678-4162-12341
dc.identifier.urihttp://hdl.handle.net/123456789/443115
dc.languageeng
dc.rightsopenAccess
dc.subjectProgresso genético
dc.subjectGenetic progress
dc.subjectBovino
dc.subjectMelhoramento Genético Animal
dc.subjectGado Zebu
dc.subjectBos Taurus
dc.subjectTeste de Progênie
dc.subjectProgeny testing
dc.titleGenetic parameters and genetic trends of conformation and management traits in Dairy Gir cattle.
dc.typeArtigo de periódico

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