Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs

Detalhes bibliográficos
Autor(a) principal: Tamioso,Priscilla Regina
Data de Publicação: 2013
Outros Autores: Alberti Filho,Jaime Luiz, Dias,Laila Talarico, Teixeira,Rodrigo de Almeida
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ciência Rural
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016
Resumo: The study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was considered as the best to estimate the coefficient of heritability for W180 and ADG2, and model 1 for ADG3. Direct heritability estimates were inflated when maternal effects were ignored. According to the most suitable models, the heritability estimates for BW, WW, W180, ADG1, ADG2 and ADG3 were 0.06, 0.08, 0.09, 0.07, 0.08 and 0.07, respectively, indicating low possibility of genetic gain through individual selection. The results show the importance of including maternal effects in the models to properly estimate genetic parameters even at post-weaning ages.
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spelling Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambsaverage daily weight gainbody weightheritabilitymaternal effectsSuffolkThe study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was considered as the best to estimate the coefficient of heritability for W180 and ADG2, and model 1 for ADG3. Direct heritability estimates were inflated when maternal effects were ignored. According to the most suitable models, the heritability estimates for BW, WW, W180, ADG1, ADG2 and ADG3 were 0.06, 0.08, 0.09, 0.07, 0.08 and 0.07, respectively, indicating low possibility of genetic gain through individual selection. The results show the importance of including maternal effects in the models to properly estimate genetic parameters even at post-weaning ages.Universidade Federal de Santa Maria2013-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016Ciência Rural v.43 n.12 2013reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/S0103-84782013001200016info:eu-repo/semantics/openAccessTamioso,Priscilla ReginaAlberti Filho,Jaime LuizDias,Laila TalaricoTeixeira,Rodrigo de Almeidaeng2013-11-19T00:00:00ZRevista
dc.title.none.fl_str_mv Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
title Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
spellingShingle Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
Tamioso,Priscilla Regina
average daily weight gain
body weight
heritability
maternal effects
Suffolk
title_short Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
title_full Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
title_fullStr Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
title_full_unstemmed Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
title_sort Estimates of (co)variance components and genetic parameters for growth traits in Suffolk lambs
author Tamioso,Priscilla Regina
author_facet Tamioso,Priscilla Regina
Alberti Filho,Jaime Luiz
Dias,Laila Talarico
Teixeira,Rodrigo de Almeida
author_role author
author2 Alberti Filho,Jaime Luiz
Dias,Laila Talarico
Teixeira,Rodrigo de Almeida
author2_role author
author
author
dc.contributor.author.fl_str_mv Tamioso,Priscilla Regina
Alberti Filho,Jaime Luiz
Dias,Laila Talarico
Teixeira,Rodrigo de Almeida
dc.subject.por.fl_str_mv average daily weight gain
body weight
heritability
maternal effects
Suffolk
topic average daily weight gain
body weight
heritability
maternal effects
Suffolk
description The study aimed to estimate the components of (co)variance and heritability for weights at birth (BW), weaning (WW) and 180 days of age (W180), as well as the average daily gains from birth to weaning (ADG1), birth to 180 days of age (ADG2) and weaning to 180 days of age (ADG3) in Suffolk sheep. Thus, three different single-trait animal models were fitted, considering the direct additive genetic effect (Model 1), the direct additive genetic and maternal permanent environmental effects (Model 2), and in Model 3, in addition to those in Model 2, the maternal additive genetic effect was included. After comparing models through the likelihood ratio test (LRT), model 3 was chosen as the most appropriate to estimate heritability for BW, WW and ADG1. Model 2 was considered as the best to estimate the coefficient of heritability for W180 and ADG2, and model 1 for ADG3. Direct heritability estimates were inflated when maternal effects were ignored. According to the most suitable models, the heritability estimates for BW, WW, W180, ADG1, ADG2 and ADG3 were 0.06, 0.08, 0.09, 0.07, 0.08 and 0.07, respectively, indicating low possibility of genetic gain through individual selection. The results show the importance of including maternal effects in the models to properly estimate genetic parameters even at post-weaning ages.
publishDate 2013
dc.date.none.fl_str_mv 2013-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001200016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-84782013001200016
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 Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural v.43 n.12 2013
reponame:Ciência Rural
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Rural
collection Ciência Rural
repository.name.fl_str_mv
repository.mail.fl_str_mv
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