Correlated changes in body shape after five generations of selection to improve growth rate in a breeding program for Nile tilapia Oreochromis niloticus in Brazil

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dc.contributor.authorLopes de Oliveira, Carlos Antonio
dc.contributor.authorRibeiro, Ricardo Pereira
dc.contributor.authorYoshida, Grazyella Massako [UNESP]
dc.contributor.authorKunita, Natali Miwa
dc.contributor.authorRizzato, Gabriel Soriani
dc.contributor.authorOliveira, Sheila Nogueira de
dc.contributor.authorSantos, Alexandra Ines dos
dc.contributor.authorNguyen Hong Nguyen
dc.contributor.institutionUniversidade Estadual de Maringá (UEM)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAquaamerica Co
dc.contributor.institutionFundacao Univ Fed Grande Dourados
dc.contributor.institutionUniversidade Federal da Bahia (UFBA)
dc.contributor.institutionUniv Sunshine Coast
dc.date.accessioned2018-11-26T15:31:30Z
dc.date.available2018-11-26T15:31:30Z
dc.date.issued2016-11-01
dc.description.abstractBody shape is a commercial trait of great interest as it impacts profit and productivity of aquaculture enterprises. In the present study, we examined correlated changes in two measures of body shape (depth to length ratio, DL-R and ellipticity of mid sagittal plane, EL-H) from a selection program for high daily weight gain in a Nile tilapia population reared in freshwater cages in Brazil. Genetic parameters for body shape and its genetic association with growth traits (body weight and daily gain) were also estimated from 8,725 individuals with growth performance recorded over five generations from 2008 to 2013. Mixed model analysis showed that the selection program resulted in substantial improvement in growth performance (about 4 % genetic gain per generation or per year) and also brought about trivial changes in body shape. The heritabilities ranged from 0.470 to 0.564 for growth traits and 0.180 to 0.289 for body shape. The common family effects were low for all traits studied, accounting for only 3-11 % of total phenotypic variance. The genetic correlations between body shape and growth traits were weak, i.e., -0.385 between EL-H and growth traits and 0.28 between DL-R and body weight or daily gain. Strong and negative genetic association was found between the two body shape traits (rg = --0.955). Harvest body weight and daily gain are essentially the same traits, as indicated by the close to one genetic correlations between the two characters. Our results demonstrated that the selection process to increase growth rate had small, but slowly constant effect in body shape traits; and in the long term, the fish would have become rotund.en
dc.description.affiliationUniv Estadual Maringa, Ave Colombo 5700, BR-87020900 Maringa, Parana, Brazil
dc.description.affiliationUniv Estadual Julio Mesquita Filho FCAV Jaboticab, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationAquaamerica Co, Rodovia BR 491 Km 158 Fazenda Porto, BR-37130000 Alfenas, MG, Brazil
dc.description.affiliationFundacao Univ Fed Grande Dourados, Fac Ciencias Agr, Caixa Postal 533, BR-79804970 Dourados, MS, Brazil
dc.description.affiliationUniv Fed Bahia, Escola Med Vet & Zootecnia, Ave Adhemar de Barros, BR-40170110 Salvador, BA, Brazil
dc.description.affiliationUniv Sunshine Coast, Locked Bag 4, Maroochydore, Qld 4558, Australia
dc.description.affiliationUnespUniv Estadual Julio Mesquita Filho FCAV Jaboticab, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipMinisterio de Pesca e Aquicultura, Brazil (MPA)
dc.format.extent487-493
dc.identifierhttp://dx.doi.org/10.1007/s13353-016-0338-5
dc.identifier.citationJournal Of Applied Genetics. Heidelberg: Springer Heidelberg, v. 57, n. 4, p. 487-493, 2016.
dc.identifier.doi10.1007/s13353-016-0338-5
dc.identifier.fileWOS000385423900008.pdf
dc.identifier.issn1234-1983
dc.identifier.urihttp://hdl.handle.net/11449/159127
dc.identifier.wosWOS:000385423900008
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal Of Applied Genetics
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectHeritability
dc.subjectGenetic correlation
dc.subjectDaily gain
dc.subjectRotund fish
dc.subjectBody depth
dc.titleCorrelated changes in body shape after five generations of selection to improve growth rate in a breeding program for Nile tilapia Oreochromis niloticus in Brazilen
dc.typeResenha
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.orcid0000-0002-4143-955X[8]

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