GENETIC PARAMETERS AND GENETIC TRENDS FOR TESTICULAR GROWTH AND REPRODUCTIVE TRAITS IN GUZERA CATTLE

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dc.contributor.authorGrupioni, Natalia Vinhal [UNESP]
dc.contributor.authorFreire Guidolin, Diego Gomes
dc.contributor.authorVenturini, Guilherme Costa [UNESP]
dc.contributor.authorLobo, Raysildo Barbosa
dc.contributor.authorMunari, Danisio Prado [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Anhanguera Uniderp
dc.contributor.institutionANCP
dc.date.accessioned2018-11-26T16:16:14Z
dc.date.available2018-11-26T16:16:14Z
dc.date.issued2015-01-01
dc.description.abstractThis study aimed to estimate genetic parameters and genetic trends for reproductive traits and testicular growth in Guzera cattle. Variance components were estimated through two-trait analyses using the restricted maximum likelihood method. To age at first calving (AFC), first calving interval (FC1), gestation period (GP), and scrotal circumference at 365 and 450 days (SC365 and SC450, respectively) were included the random residual and additive genetic effects and the fixed effects of contemporary group. The covariates cows age at calving and AFC were included in the model for SC365 and SC450 (linear and quadratic effects) and for FC1 (linear effect), respectively. For GP, The random maternal genetic effects were also considered. Heritability estimates ranged from 0.08 +/- 0.05 (FC1) to 0.48 +/- 0.11 (GP). Genetic trends were significant (P <0.05) for all traits with the exception of the maternal genetic effect of GP. The SC365, SC450 and GP traits, could be used as selection criteria for presenting additive genetic variability sufficient to respond to the selection process. The genetic correlation between AFC and scrotal circumferences (SC365 and SC450) indicates that selection for scrotal circumference in these ages, reduce the AFC of the females.en
dc.description.affiliationUniv Estadual Paulista, UNESP, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUniv Anhanguera Uniderp, Prod & Gestao Agroind, BR-79037280 Campo Grande, MS, Brazil
dc.description.affiliationANCP, BR-14020230 Ribeirao Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent152-160
dc.identifier.citationRevista Caatinga. Mossoro: Univ Fed Rural Semi-arido-ufersa, v. 28, n. 2, p. 152-160, 2015.
dc.identifier.issn0100-316X
dc.identifier.urihttp://hdl.handle.net/11449/160674
dc.identifier.wosWOS:000358386700018
dc.language.isopor
dc.publisherUniv Fed Rural Semi-arido-ufersa
dc.relation.ispartofRevista Caatinga
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBeef cattle
dc.subjectGenetic correlation
dc.subjectScrotal circumference
dc.subjectGenetic Variability
dc.titleGENETIC PARAMETERS AND GENETIC TRENDS FOR TESTICULAR GROWTH AND REPRODUCTIVE TRAITS IN GUZERA CATTLEen
dc.typeArtigo
dcterms.rightsHolderUniv Fed Rural Semi-arido-ufersa
unesp.departmentCiências Exatas - FCAVpt

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Jaboticabal - FCAV - Faculdade de Ciências Agrárias e Veterinárias