Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping

Detalhes bibliográficos
Autor(a) principal: Nunes,Beatriz do Nascimento
Data de Publicação: 2011
Outros Autores: Ramos,Salvador Boccaletti, Savegnago,Rodrigo Pelicioni, Ledur,Mônica Corrêa, Nones,Kátia, Klein,Claudete Hara, Munari,Danísio Prado
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300011
Resumo: The objective of this study was to estimate genetic and phenotypic correlations of body weight at 6 weeks of age (BW6), as well as final carcass yield, and moisture, protein, fat and ash contents, using data from 3,422 F2 chickens originated from reciprocal cross between a broiler and a layer line. Variance components were estimated by the REML method, using animal models for evaluating random additive genetic and fixed contemporary group (sex, hatch and genetic group) effects. The heritability estimates (h²) for BW6, carcass yield and percentage of carcass moisture were 0.31 ± 0.07, 0.20 ± 0.05 and 0.33 ± 0.07, respectively. The h² for the percentages of protein, fat and ash on a dry matter basis were 0.48 ± 0.09, 0.55 ± 0.10 and 0.36 ± 0.08, respectively. BW6 had a positive genetic correlation with fat percentage in the carcass, but a negative one with protein and ash contents. Carcass yield, thus, appears to have only low genetic association with carcass composition traits. The genetic correlations observed between traits, measured on a dry matter basis, indicated that selection for carcass protein content may favor higher ash content and a lower percentage of carcass fat.
id SBG-1_843c9926623b4a627fedc753e20cc76e
oai_identifier_str oai:scielo:S1415-47572011000300011
network_acronym_str SBG-1
network_name_str Genetics and Molecular Biology
repository_id_str
spelling Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mappingbroilercarcass compositiongenetic correlationThe objective of this study was to estimate genetic and phenotypic correlations of body weight at 6 weeks of age (BW6), as well as final carcass yield, and moisture, protein, fat and ash contents, using data from 3,422 F2 chickens originated from reciprocal cross between a broiler and a layer line. Variance components were estimated by the REML method, using animal models for evaluating random additive genetic and fixed contemporary group (sex, hatch and genetic group) effects. The heritability estimates (h²) for BW6, carcass yield and percentage of carcass moisture were 0.31 ± 0.07, 0.20 ± 0.05 and 0.33 ± 0.07, respectively. The h² for the percentages of protein, fat and ash on a dry matter basis were 0.48 ± 0.09, 0.55 ± 0.10 and 0.36 ± 0.08, respectively. BW6 had a positive genetic correlation with fat percentage in the carcass, but a negative one with protein and ash contents. Carcass yield, thus, appears to have only low genetic association with carcass composition traits. The genetic correlations observed between traits, measured on a dry matter basis, indicated that selection for carcass protein content may favor higher ash content and a lower percentage of carcass fat.Sociedade Brasileira de Genética2011-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300011Genetics and Molecular Biology v.34 n.3 2011reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572011005000019info:eu-repo/semantics/openAccessNunes,Beatriz do NascimentoRamos,Salvador BoccalettiSavegnago,Rodrigo PelicioniLedur,Mônica CorrêaNones,KátiaKlein,Claudete HaraMunari,Danísio Pradoeng2011-08-05T00:00:00Zoai:scielo:S1415-47572011000300011Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2011-08-05T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
title Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
spellingShingle Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
Nunes,Beatriz do Nascimento
broiler
carcass composition
genetic correlation
title_short Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
title_full Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
title_fullStr Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
title_full_unstemmed Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
title_sort Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
author Nunes,Beatriz do Nascimento
author_facet Nunes,Beatriz do Nascimento
Ramos,Salvador Boccaletti
Savegnago,Rodrigo Pelicioni
Ledur,Mônica Corrêa
Nones,Kátia
Klein,Claudete Hara
Munari,Danísio Prado
author_role author
author2 Ramos,Salvador Boccaletti
Savegnago,Rodrigo Pelicioni
Ledur,Mônica Corrêa
Nones,Kátia
Klein,Claudete Hara
Munari,Danísio Prado
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Nunes,Beatriz do Nascimento
Ramos,Salvador Boccaletti
Savegnago,Rodrigo Pelicioni
Ledur,Mônica Corrêa
Nones,Kátia
Klein,Claudete Hara
Munari,Danísio Prado
dc.subject.por.fl_str_mv broiler
carcass composition
genetic correlation
topic broiler
carcass composition
genetic correlation
description The objective of this study was to estimate genetic and phenotypic correlations of body weight at 6 weeks of age (BW6), as well as final carcass yield, and moisture, protein, fat and ash contents, using data from 3,422 F2 chickens originated from reciprocal cross between a broiler and a layer line. Variance components were estimated by the REML method, using animal models for evaluating random additive genetic and fixed contemporary group (sex, hatch and genetic group) effects. The heritability estimates (h²) for BW6, carcass yield and percentage of carcass moisture were 0.31 ± 0.07, 0.20 ± 0.05 and 0.33 ± 0.07, respectively. The h² for the percentages of protein, fat and ash on a dry matter basis were 0.48 ± 0.09, 0.55 ± 0.10 and 0.36 ± 0.08, respectively. BW6 had a positive genetic correlation with fat percentage in the carcass, but a negative one with protein and ash contents. Carcass yield, thus, appears to have only low genetic association with carcass composition traits. The genetic correlations observed between traits, measured on a dry matter basis, indicated that selection for carcass protein content may favor higher ash content and a lower percentage of carcass fat.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01
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=S1415-47572011000300011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000300011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47572011005000019
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 Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.34 n.3 2011
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
instacron:SBG
instname_str Sociedade Brasileira de Genética (SBG)
instacron_str SBG
institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
_version_ 1752122384123428864