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dc.contributor.authorCAMPOS, R. V.pt_BR
dc.contributor.authorCOBUCI, J. A.pt_BR
dc.contributor.authorKERN, E. L.pt_BR
dc.contributor.authorCOSTA, C. N.pt_BR
dc.contributor.authorMcMANUS, C. M.pt_BR
dc.date.accessioned2016-01-08T11:11:11Zpt_BR
dc.date.available2016-01-08T11:11:11Zpt_BR
dc.date.created2016-01-08pt_BR
dc.date.issued2015pt_BR
dc.identifier.citationAsian-Australasian Journal of Animal Sciences, v. 28, n. 4, p. 476-484, 2015.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1033399pt_BR
dc.descriptionThe objective of this study was to estimate genetic and phenotypic parameters for linear type traits, as well as milk yield (MY), fat yield (FY) and protein yield (PY) in 18,831 Holstein cows reared in 495 herds in Brazil. Restricted maximum likelihood with a bivariate model was used for estimation genetic parameters, including fixed effects of herd-year of classification, period of classification, classifier and stage of lactation for linear type traits and herd-year of calving, season of calving and lactation order effects for production traits. The age of cow at calving was fitted as a covariate (with linear and quadratic terms), common to both models. Heritability estimates varied from 0.09 to 0.38 for linear type traits and from 0.17 to 0.24 for production traits, indicating sufficient genetic variability to achieve genetic gain through selection. In general, estimates of genetic correlations between type and production traits were low, except for udder texture and angularity that showed positive genetic correlations (>0.29) with MY, FY, and PY. Udder depth had the highest negative genetic correlation (-0.30) with production traits. Selection for final score, commonly used by farmers as a practical selection tool to improve type traits, does not lead to significant improvements in production traits, thus the use of selection indices that consider both sets of traits (production and type) seems to be the most adequate to carry out genetic selection of animals in the Brazilian herd.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectFunctional Traitpt_BR
dc.subjectSelectionpt_BR
dc.titleGenetic parameters for linear type traits and milk, fat, and protein production in holstein cows in Brazil.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2016-03-14T11:11:11Zpt_BR
dc.subject.nalthesaurusgenetic correlationpt_BR
dc.subject.nalthesaurusdairy cattlept_BR
dc.subject.nalthesaurusheritabilitypt_BR
riaa.ainfo.id1033399pt_BR
riaa.ainfo.lastupdate2016-03-14pt_BR
dc.contributor.institutionRafael Viegas Campos; Jaime Araujo Cobuci; Elisandra Lurdes Kern; CLAUDIO NAPOLIS COSTA, CNPGL; Concepta Margaret McManus.pt_BR
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