Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/42594 |
Resumo: | The 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. |
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Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gainBayesian approachGenetic correlationGenetic gainHeritabilityThe 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.Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ)2020-08-22T22:16:14Z2020-08-22T22:16:14Z2014-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfREIS NETO, R. V. et al. Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain. Scientia Agricola, Piracicaba, v. 71, n. 4, p. 259-265, July/Aug. 2014. DOI: 10.1590/0103-9016-2013-0294.http://repositorio.ufla.br/jspui/handle/1/42594Scientia Agricolareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessReis Neto, Rafael VilhenaOliveira, Carlos Antônio Lopes deRibeiro, Ricardo PereiraFreitas, Rilke Tadeu Fonseca deAllaman, Ivan BezerraOliveira, Sheila Nogueira deeng2020-08-22T22:16:15Zoai:localhost:1/42594Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-08-22T22:16:15Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
title |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
spellingShingle |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain Reis Neto, Rafael Vilhena Bayesian approach Genetic correlation Genetic gain Heritability |
title_short |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
title_full |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
title_fullStr |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
title_full_unstemmed |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
title_sort |
Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain |
author |
Reis Neto, Rafael Vilhena |
author_facet |
Reis Neto, Rafael Vilhena Oliveira, Carlos Antônio Lopes de Ribeiro, Ricardo Pereira Freitas, Rilke Tadeu Fonseca de Allaman, Ivan Bezerra Oliveira, Sheila Nogueira de |
author_role |
author |
author2 |
Oliveira, Carlos Antônio Lopes de Ribeiro, Ricardo Pereira Freitas, Rilke Tadeu Fonseca de Allaman, Ivan Bezerra Oliveira, Sheila Nogueira de |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Reis Neto, Rafael Vilhena Oliveira, Carlos Antônio Lopes de Ribeiro, Ricardo Pereira Freitas, Rilke Tadeu Fonseca de Allaman, Ivan Bezerra Oliveira, Sheila Nogueira de |
dc.subject.por.fl_str_mv |
Bayesian approach Genetic correlation Genetic gain Heritability |
topic |
Bayesian approach Genetic correlation Genetic gain Heritability |
description |
The 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. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-08 2020-08-22T22:16:14Z 2020-08-22T22:16:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
REIS NETO, R. V. et al. Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain. Scientia Agricola, Piracicaba, v. 71, n. 4, p. 259-265, July/Aug. 2014. DOI: 10.1590/0103-9016-2013-0294. http://repositorio.ufla.br/jspui/handle/1/42594 |
identifier_str_mv |
REIS NETO, R. V. et al. Genetic parameters and trends of morphometric traits of GIFT tilapia under selection for weight gain. Scientia Agricola, Piracicaba, v. 71, n. 4, p. 259-265, July/Aug. 2014. DOI: 10.1590/0103-9016-2013-0294. |
url |
http://repositorio.ufla.br/jspui/handle/1/42594 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ) |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ) |
dc.source.none.fl_str_mv |
Scientia Agricola reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1784550126355742720 |