Production and body composition traits of broilers in relation to breast weight evaluated by path analysis
Autor(a) principal: | |
---|---|
Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300008 |
Resumo: | Breast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body weight at 7 and 28 days, and at slaughter, and depth of the breast muscle measured by ultrasonography), carcass (eviscerated body weight and leg weight) and body composition (heart, liver and abdominal fat weight) traits in a broiler line, and quantify the direct and indirect influence of these traits on breast weight. Path analysis was used by expanding the matrix of partial correlation in coefficients which give the direct influence of one trait on another, regardless the effect of the other traits. The simultaneous maintenance of live body weight at slaughter and eviscerated body weight in the matrix of correlations might be harmful for statistical analysis involving systems of normal equations, like path analysis, due to the observed multicollinearity. The live body weight at slaughter and the depth of the breast muscle as measured by ultrasonography directly affected breast weight and were identified as the most responsible factors for the magnitude of the correlation coefficients obtained between the studied traits and breast weight. Individual pre-selection for these traits could favor an increased breast weight in the future reproducer candidates of this line if the broilers' environmental conditions and housing are maintained, since the live body weight at slaughter and the depth of breast muscle measured by ultrasonography were directly related to breast weight. |
id |
USP-18_a348fa6ccc96b2ab1ed98153f0f8d586 |
---|---|
oai_identifier_str |
oai:scielo:S0103-90162011000300008 |
network_acronym_str |
USP-18 |
network_name_str |
Scientia Agrícola (Online) |
repository_id_str |
|
spelling |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysisanimal breedingmultivariate analysisphenotypic correlationpoultrypre-selectionBreast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body weight at 7 and 28 days, and at slaughter, and depth of the breast muscle measured by ultrasonography), carcass (eviscerated body weight and leg weight) and body composition (heart, liver and abdominal fat weight) traits in a broiler line, and quantify the direct and indirect influence of these traits on breast weight. Path analysis was used by expanding the matrix of partial correlation in coefficients which give the direct influence of one trait on another, regardless the effect of the other traits. The simultaneous maintenance of live body weight at slaughter and eviscerated body weight in the matrix of correlations might be harmful for statistical analysis involving systems of normal equations, like path analysis, due to the observed multicollinearity. The live body weight at slaughter and the depth of the breast muscle as measured by ultrasonography directly affected breast weight and were identified as the most responsible factors for the magnitude of the correlation coefficients obtained between the studied traits and breast weight. Individual pre-selection for these traits could favor an increased breast weight in the future reproducer candidates of this line if the broilers' environmental conditions and housing are maintained, since the live body weight at slaughter and the depth of breast muscle measured by ultrasonography were directly related to breast weight.Escola Superior de Agricultura "Luiz de Queiroz"2011-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300008Scientia Agricola v.68 n.3 2011reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162011000300008info:eu-repo/semantics/openAccessLorentz,Leandro HomrichGaya,Leila de GenovaLunedo,RaquelFerraz,José Bento StermanRezende,Fernanda Marcondes deMichelan Filho,Tércioeng2011-07-11T00:00:00Zoai:scielo:S0103-90162011000300008Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2011-07-11T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
title |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
spellingShingle |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis Lorentz,Leandro Homrich animal breeding multivariate analysis phenotypic correlation poultry pre-selection |
title_short |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
title_full |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
title_fullStr |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
title_full_unstemmed |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
title_sort |
Production and body composition traits of broilers in relation to breast weight evaluated by path analysis |
author |
Lorentz,Leandro Homrich |
author_facet |
Lorentz,Leandro Homrich Gaya,Leila de Genova Lunedo,Raquel Ferraz,José Bento Sterman Rezende,Fernanda Marcondes de Michelan Filho,Tércio |
author_role |
author |
author2 |
Gaya,Leila de Genova Lunedo,Raquel Ferraz,José Bento Sterman Rezende,Fernanda Marcondes de Michelan Filho,Tércio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lorentz,Leandro Homrich Gaya,Leila de Genova Lunedo,Raquel Ferraz,José Bento Sterman Rezende,Fernanda Marcondes de Michelan Filho,Tércio |
dc.subject.por.fl_str_mv |
animal breeding multivariate analysis phenotypic correlation poultry pre-selection |
topic |
animal breeding multivariate analysis phenotypic correlation poultry pre-selection |
description |
Breast weight has great economic importance in poultry industry, and may be associated with other variables. This work aimed to estimate phenotypic correlations between performance (live body weight at 7 and 28 days, and at slaughter, and depth of the breast muscle measured by ultrasonography), carcass (eviscerated body weight and leg weight) and body composition (heart, liver and abdominal fat weight) traits in a broiler line, and quantify the direct and indirect influence of these traits on breast weight. Path analysis was used by expanding the matrix of partial correlation in coefficients which give the direct influence of one trait on another, regardless the effect of the other traits. The simultaneous maintenance of live body weight at slaughter and eviscerated body weight in the matrix of correlations might be harmful for statistical analysis involving systems of normal equations, like path analysis, due to the observed multicollinearity. The live body weight at slaughter and the depth of the breast muscle as measured by ultrasonography directly affected breast weight and were identified as the most responsible factors for the magnitude of the correlation coefficients obtained between the studied traits and breast weight. Individual pre-selection for these traits could favor an increased breast weight in the future reproducer candidates of this line if the broilers' environmental conditions and housing are maintained, since the live body weight at slaughter and the depth of breast muscle measured by ultrasonography were directly related to breast weight. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-06-01 |
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=S0103-90162011000300008 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300008 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162011000300008 |
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 |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.68 n.3 2011 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936462433255424 |