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Estimation of genetic parameters for body weights, scrotal circumference, and testicular volume measured at different ages in Nellore cattle

dc.contributor.authorBoligon, A. A. [UNESP]
dc.contributor.authorSilva, J. A. V.
dc.contributor.authorSesana, R. C. [UNESP]
dc.contributor.authorSesana, J. C. [UNESP]
dc.contributor.authorJunqueira, J. B. [UNESP]
dc.contributor.authorAlbuquerque, Lucia Galvão de [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionPolo Excelencia Genet Bovina
dc.date.accessioned2014-05-20T13:18:24Z
dc.date.available2014-05-20T13:18:24Z
dc.date.issued2010-04-01
dc.description.abstractData from 129,575 Nellore cattle born between 1993 and 2006, belonging to the Jacarezinho cattle-raising farm, were used to estimate genetic parameters for scrotal circumference measured at 9 (SC9), 12 (SC12), and 18 (SC18) mo of age and testicular volume measured at the same ages (TV9, TV12, and TV18) and to determine their correlation with weaning weight (WW) and yearling weight (YW), to provide information for the definition of selection criteria in beef cattle. Estimates of (co) variance components were calculated by the REML method applying an animal model in single- and multiple-trait analysis. The following heritability estimates and their respective SE were obtained for WW, YW, SC9, SC12, SC18, TV9, TV12, and TV18: 0.33 +/- 0.02, 0.37 +/- 0.03, 0.29 +/- 0.03, 0.39 +/- 0.04, 0.42 +/- 0.03, 0.19 +/- 0.04, 0.26 +/- 0.05, and 0.39 +/- 0.04, respectively. The genetic correlation between WW and YW was positive and high (0.80 +/- 0.04), indicating that these traits are mainly determined by the same genes. Genetic correlations between the growth traits and scrotal circumference measures were positive and of low to moderate magnitude, ranging from 0.23 +/- 0.04 to 0.38 +/- 0.04. on the other hand, increased genetic associations were estimated between scrotal circumference and testicular volume at different ages (0.61 +/- 0.04 to 0.86 +/- 0.04). Selection for greater scrotal circumference in males should result in greater WW, YW, and testicular volume. In conclusion, in view of the difficulty in measuring testicular volume, there is no need to change the selection criterion from scrotal circumference to testicular volume in genetic breeding programs of Zebu breeds.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 São Paulo, Brazil
dc.description.affiliationPolo Excelencia Genet Bovina, BR-38022330 Uberaba, MG, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Agr & Vet, BR-14884900 São Paulo, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1215-1219
dc.identifierhttp://dx.doi.org/10.2527/jas.2008-1719
dc.identifier.citationJournal of Animal Science. Champaign: Amer Soc Animal Science, v. 88, n. 4, p. 1215-1219, 2010.
dc.identifier.doi10.2527/jas.2008-1719
dc.identifier.issn0021-8812
dc.identifier.lattes5866981114947883
dc.identifier.urihttp://hdl.handle.net/11449/4502
dc.identifier.wosWOS:000275898600001
dc.language.isoeng
dc.publisherAmer Soc Animal Science
dc.relation.ispartofJournal of Animal Science
dc.relation.ispartofjcr1.711
dc.relation.ispartofsjr0,848
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBeef cattleen
dc.subjectGenetic correlationen
dc.subjectHeritabilityen
dc.titleEstimation of genetic parameters for body weights, scrotal circumference, and testicular volume measured at different ages in Nellore cattleen
dc.typeResumo
dcterms.licensehttp://journalofanimalscience.org/site/misc/ifora.xhtml
dcterms.rightsHolderAmer Soc Animal Science
unesp.author.lattes5866981114947883
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt
unesp.departmentZootecnia - FCAVpt

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