Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle

Detalhes bibliográficos
Autor(a) principal: Tramonte,Nicole Colucci
Data de Publicação: 2019
Outros Autores: Grupioni,Natalia Vinhal, Stafuzza,Nedenia Bonvino, Guidolin,Diego Gomes Freire, Savegnago,Rodrigo Pelicioni, Bezerra,Luiz Antonio Framartino, Lôbo,Raysildo Barbosa, Munari,Danísio Prado
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Zootecnia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100308
Resumo: ABSTRACT The objectives of this study were to estimate genetic parameters and genetic trends and perform principal component analysis for the following traits: body weight adjusted at 210 days of age (W210), one year (W365), and yearling or 450 days of age (W450); weight gain from birth to weaning or 210 days of age (WGBW), from weaning to 365 days of age (WGW365), and from one year to yearling (WGY); and scrotal circumference adjusted at 365 (SC365) and 450 (SC450) days of age of Guzera beef cattle. Variance components were estimated under a two-trait animal model using the restricted maximum likelihood method. The fixed effects included in the model were birth season, contemporary group, and covariable age of dam at calving as linear and quadratic effects. Heritability estimates ranged from 0.10 (WGY) to 0.41 (W450 and SC450). The studied traits could be used as selection criteria because of their sufficient additive genetic variability to respond to the selection process. However, lower selection efficiency is expected for WGBW and WGY. Genetic trends studied were significant for all traits, except WGY. The W365 and W450 traits belonged to the “Genetic Merit Total” index and responded to selection with favorable genetic gain per year. The traits that were not included in the selection index showed favorable positive genetic correlations attributed to the indirect selection processes. The principal component analysis identified two groups of traits. The first group related to body weight and weight gain and the second related to the scrotal circumference, indicating that selection could be applied to one group of traits within each observed group. The genetic gains were attributed in the same direction for the other traits belonging to the groups. Thus, we recommend selecting animals for W365 based on first group, and SC365 based on second.
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spelling Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattleanimal breedingBos taurus indicusgenetic correlationheritabilityABSTRACT The objectives of this study were to estimate genetic parameters and genetic trends and perform principal component analysis for the following traits: body weight adjusted at 210 days of age (W210), one year (W365), and yearling or 450 days of age (W450); weight gain from birth to weaning or 210 days of age (WGBW), from weaning to 365 days of age (WGW365), and from one year to yearling (WGY); and scrotal circumference adjusted at 365 (SC365) and 450 (SC450) days of age of Guzera beef cattle. Variance components were estimated under a two-trait animal model using the restricted maximum likelihood method. The fixed effects included in the model were birth season, contemporary group, and covariable age of dam at calving as linear and quadratic effects. Heritability estimates ranged from 0.10 (WGY) to 0.41 (W450 and SC450). The studied traits could be used as selection criteria because of their sufficient additive genetic variability to respond to the selection process. However, lower selection efficiency is expected for WGBW and WGY. Genetic trends studied were significant for all traits, except WGY. The W365 and W450 traits belonged to the “Genetic Merit Total” index and responded to selection with favorable genetic gain per year. The traits that were not included in the selection index showed favorable positive genetic correlations attributed to the indirect selection processes. The principal component analysis identified two groups of traits. The first group related to body weight and weight gain and the second related to the scrotal circumference, indicating that selection could be applied to one group of traits within each observed group. The genetic gains were attributed in the same direction for the other traits belonging to the groups. Thus, we recommend selecting animals for W365 based on first group, and SC365 based on second.Sociedade Brasileira de Zootecnia2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100308Revista Brasileira de Zootecnia v.48 2019reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/rbz4820180034info:eu-repo/semantics/openAccessTramonte,Nicole ColucciGrupioni,Natalia VinhalStafuzza,Nedenia BonvinoGuidolin,Diego Gomes FreireSavegnago,Rodrigo PelicioniBezerra,Luiz Antonio FramartinoLôbo,Raysildo BarbosaMunari,Danísio Pradoeng2019-09-09T00:00:00Zoai:scielo:S1516-35982019000100308Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2019-09-09T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false
dc.title.none.fl_str_mv Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
title Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
spellingShingle Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
Tramonte,Nicole Colucci
animal breeding
Bos taurus indicus
genetic correlation
heritability
title_short Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
title_full Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
title_fullStr Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
title_full_unstemmed Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
title_sort Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle
author Tramonte,Nicole Colucci
author_facet Tramonte,Nicole Colucci
Grupioni,Natalia Vinhal
Stafuzza,Nedenia Bonvino
Guidolin,Diego Gomes Freire
Savegnago,Rodrigo Pelicioni
Bezerra,Luiz Antonio Framartino
Lôbo,Raysildo Barbosa
Munari,Danísio Prado
author_role author
author2 Grupioni,Natalia Vinhal
Stafuzza,Nedenia Bonvino
Guidolin,Diego Gomes Freire
Savegnago,Rodrigo Pelicioni
Bezerra,Luiz Antonio Framartino
Lôbo,Raysildo Barbosa
Munari,Danísio Prado
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Tramonte,Nicole Colucci
Grupioni,Natalia Vinhal
Stafuzza,Nedenia Bonvino
Guidolin,Diego Gomes Freire
Savegnago,Rodrigo Pelicioni
Bezerra,Luiz Antonio Framartino
Lôbo,Raysildo Barbosa
Munari,Danísio Prado
dc.subject.por.fl_str_mv animal breeding
Bos taurus indicus
genetic correlation
heritability
topic animal breeding
Bos taurus indicus
genetic correlation
heritability
description ABSTRACT The objectives of this study were to estimate genetic parameters and genetic trends and perform principal component analysis for the following traits: body weight adjusted at 210 days of age (W210), one year (W365), and yearling or 450 days of age (W450); weight gain from birth to weaning or 210 days of age (WGBW), from weaning to 365 days of age (WGW365), and from one year to yearling (WGY); and scrotal circumference adjusted at 365 (SC365) and 450 (SC450) days of age of Guzera beef cattle. Variance components were estimated under a two-trait animal model using the restricted maximum likelihood method. The fixed effects included in the model were birth season, contemporary group, and covariable age of dam at calving as linear and quadratic effects. Heritability estimates ranged from 0.10 (WGY) to 0.41 (W450 and SC450). The studied traits could be used as selection criteria because of their sufficient additive genetic variability to respond to the selection process. However, lower selection efficiency is expected for WGBW and WGY. Genetic trends studied were significant for all traits, except WGY. The W365 and W450 traits belonged to the “Genetic Merit Total” index and responded to selection with favorable genetic gain per year. The traits that were not included in the selection index showed favorable positive genetic correlations attributed to the indirect selection processes. The principal component analysis identified two groups of traits. The first group related to body weight and weight gain and the second related to the scrotal circumference, indicating that selection could be applied to one group of traits within each observed group. The genetic gains were attributed in the same direction for the other traits belonging to the groups. Thus, we recommend selecting animals for W365 based on first group, and SC365 based on second.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100308
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100308
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/rbz4820180034
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Zootecnia
publisher.none.fl_str_mv Sociedade Brasileira de Zootecnia
dc.source.none.fl_str_mv Revista Brasileira de Zootecnia v.48 2019
reponame:Revista Brasileira de Zootecnia (Online)
instname:Sociedade Brasileira de Zootecnia (SBZ)
instacron:SBZ
instname_str Sociedade Brasileira de Zootecnia (SBZ)
instacron_str SBZ
institution SBZ
reponame_str Revista Brasileira de Zootecnia (Online)
collection Revista Brasileira de Zootecnia (Online)
repository.name.fl_str_mv Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)
repository.mail.fl_str_mv ||bz@sbz.org.br|| secretariarbz@sbz.org.br
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