Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , |
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. |
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Genetics and Molecular Biology |
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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 |