Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain

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dc.contributor.authorReis Neto, Rafael Vilhena [UNESP]
dc.contributor.authorOliveira, Carlos Antônio Lopes de
dc.contributor.authorRibeiro, Ricardo Pereira
dc.contributor.authorFreitas, Rilke Tadeu Fonseca de
dc.contributor.authorAllaman, Ivan Bezerra
dc.contributor.authorOliveira, Sheila Nogueira de
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)
dc.contributor.institutionUniversidade Federal de Lavras (UFLA)
dc.contributor.institutionUniversidade Estadual de Santa Cruz (UESC)
dc.date.accessioned2015-11-03T15:29:40Z
dc.date.available2015-11-03T15:29:40Z
dc.date.issued2014-07-01
dc.description.abstractThe main factor considered in breeding programs for fish is growth, which can be assessed in terms of a gain in either weight or body measurements. This study was undertaken to evaluate the morphometric traits of GIFT strain tilapia (Oreochromis sp.) selected for weight gain. The data set used contained information on 6,650 animals. The genetic values of 8,590 animals in a relationship matrix of five generations were predicted. The following morphometric measurements were evaluated: standard length; body depth and body width. Body area and volume were also calculated. Bi-character analyses involving morphometric traits were used to estimate (co)variance components. Heritability, larval and fingerling common environmental effects were estimated for each trait, together with the genetic and phenotypic correlations between traits. Bayesian procedures were utilised by Gibbs chains, and the convergence of the chains was tested using the Heidelberger and Welch method. Genetic trends were estimated by segmented regression of the fish breeding values of the generations considered in this study. Estimates of heritability (0.28 a 0.31) had moderate to high magnitudes for all traits. Genetic correlations between traits were all above 0.8, and the genetic gains were satisfactory from the third generation onwards. From the estimates of the genetic parameters and genetic gain the morphometric traits evaluated have good potential for selection.en
dc.description.affiliationUniversidade Estadual de Maringá, Departamento de Zoologia
dc.description.affiliationUniversidade Federal de Lavras, Departamento de Zoologia
dc.description.affiliationUniversidade Estadual de Santa Cruz, Departamento de Estatística
dc.description.affiliationUnespUniversidade Estadual Paulista, Departamento de Engenharia de Pesca, Câmpus Experimental de Registro
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.format.extent259-265
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400001
dc.identifier.citationScientia Agricola. Cerquera Cesar: Univ Sao Paolo, v. 71, n. 4, p. 259-265, 2014.
dc.identifier.doi10.1590/0103-9016-2013-0294
dc.identifier.fileS0103-90162014000400001.pdf
dc.identifier.issn0103-9016
dc.identifier.lattes7328177916306037
dc.identifier.orcid0000-0002-4192-3982
dc.identifier.scieloS0103-90162014000400001
dc.identifier.urihttp://hdl.handle.net/11449/130148
dc.identifier.wosWOS:000342856300001
dc.language.isoeng
dc.publisherUniv Sao Paolo
dc.relation.ispartofScientia Agricola
dc.relation.ispartofsjr0,578
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBayesian approachen
dc.subjectGenetic correlationen
dc.subjectGenetic gainen
dc.subjectHeritabilityen
dc.titleGenetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gainen
dc.typeArtigo
dcterms.rightsHolderUniv Sao Paolo
unesp.author.lattes7328177916306037[1]
unesp.author.orcid0000-0002-4192-3982[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias do Vale do Ribeira, Registropt

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