Genetic parameters for carcass traits and body size of meat sheep
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23056 |
Resumo: | The present study aimed to estimate variance components and heritability coefficients (h2) in Santa Inês sheep by single- and two-trait analyses for the traits loin eye area (LEA), length (LEL) and maximum depth (LED), in the longissimus dorsi muscle, subcutaneous fat thickness (SFT), fat thickness over the biceps femoris muscle (FTBF), croup height (CH), thoracic circumference (TC), thoracic depth (TD), body length (BL), and adult live weight (ALW). The restricted maximum likelihood (REML) was used to estimate variance components in an animal model. In both types of analyses, we estimated moderate heritability for all traits, with the exception of SFT, CH, TC, BL, and ALW (all of which yielded low h2 estimates). In two-trait analysis for body size, only TD yielded a lower h2 estimate, when compared to single-trait analysis. On the other hand, CH, TC, and BL yielded higher h2 estimates. Most estimates for variance components and h2 in two-trait analysis were higher than those in single-trait analysis. This finding suggests the possibility of a moderate response to selection for improvement in the carcass of meat sheep using the specific carcass traits evaluated (except SFT), highlighting LEA. The fat thickness over the biceps femoris muscle showed higher potential for response to direct selection for fat deposition than SFT. Thoracic depth showed higher potential for response to direct selection for body size than the other morphometric measurements. In the present study, adult live weight was not an effective criterion for direct selection. |
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Semina. Ciências Agrárias (Online) |
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Genetic parameters for carcass traits and body size of meat sheepParâmetros genéticos para características de carcaça e tamanho corporal em ovinos de corteAnimal modelHeritabilityLongissimus dorsiMorphometrySelectionVariance components.Componentes de variânciaHerdabilidadeLongissimus dorsiModelo animalMorfometriaSeleção.The present study aimed to estimate variance components and heritability coefficients (h2) in Santa Inês sheep by single- and two-trait analyses for the traits loin eye area (LEA), length (LEL) and maximum depth (LED), in the longissimus dorsi muscle, subcutaneous fat thickness (SFT), fat thickness over the biceps femoris muscle (FTBF), croup height (CH), thoracic circumference (TC), thoracic depth (TD), body length (BL), and adult live weight (ALW). The restricted maximum likelihood (REML) was used to estimate variance components in an animal model. In both types of analyses, we estimated moderate heritability for all traits, with the exception of SFT, CH, TC, BL, and ALW (all of which yielded low h2 estimates). In two-trait analysis for body size, only TD yielded a lower h2 estimate, when compared to single-trait analysis. On the other hand, CH, TC, and BL yielded higher h2 estimates. Most estimates for variance components and h2 in two-trait analysis were higher than those in single-trait analysis. This finding suggests the possibility of a moderate response to selection for improvement in the carcass of meat sheep using the specific carcass traits evaluated (except SFT), highlighting LEA. The fat thickness over the biceps femoris muscle showed higher potential for response to direct selection for fat deposition than SFT. Thoracic depth showed higher potential for response to direct selection for body size than the other morphometric measurements. In the present study, adult live weight was not an effective criterion for direct selection.Objetivou-se com esta pesquisa estimar componentes de variância e coeficientes de herdabilidade (h2) por análises uni e bicaracterística para as características área (AOL), comprimento (COL) e profundidade máxima (POL) de olho de lombo, no músculo longissimus dorsi, espessura de gordura subcutânea (EGS), espessura de gordura do músculo biceps femoris (EGBF), altura da garupa (AG), circunferência torácica (CT), profundidade torácica (PT), comprimento corporal (CC) e peso vivo à idade adulta (PA), em ovinos Santa Inês. Foi utilizado modelo animal pela metodologia da máxima verossimilhança restrita (REML). Estimou-se herdabilidade moderada para as características, nos dois tipos de análise, exceto para EGS, AG, CT, CC e PA, para as quais as estimativas foram de baixa magnitude. Nas análises bicaracterísticas para tamanho corporal, apenas PT apresentou menor estimativa de h2, quando comparado com a análise unicaracterística, enquanto que AG, CT e CC apresentaram valores maiores. Nas análises bicaracterísticas, a maioria das estimativas de componentes de variância e h2 foram superiores àquelas obtidas nas análises unicaracterística, o que evidencia a possibilidade de resposta moderada à seleção para melhoria da carcaça em ovinos de corte usando as características de carcaça avaliadas, com exceção de EGS e com destaque para área de olho de lombo. A espessura de gordura do músculo biceps femoris apresentou maior potencial para resposta à seleção direta para deposição de gordura na carcaça comparado a EGS. A profundidade torácica demonstrou maior potencial de resposta à seleção direta para tamanho corporal entre as medidas morfométricas estudadas. O peso vivo à idade adulta não demonstrou neste estudo ser um bom critério para seleção direta.UEL2016-09-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa Empírica de Campoapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2305610.5433/1679-0359.2016v37n4Supl1p2477Semina: Ciências Agrárias; Vol. 37 No. 4Supl1 (2016); 2477-2486Semina: Ciências Agrárias; v. 37 n. 4Supl1 (2016); 2477-24861679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23056/19595http://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessSena, Luciano SilvaSantos, Gleyson Vieira dosTorres, Tatiana SaraivaSousa Júnior, Antônio deRego Neto, Aurino de AraújoSarmento, José Lindenberg RochaBiagiotti, Daniel2022-11-30T15:10:45Zoai:ojs.pkp.sfu.ca:article/23056Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-11-30T15:10:45Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Genetic parameters for carcass traits and body size of meat sheep Parâmetros genéticos para características de carcaça e tamanho corporal em ovinos de corte |
title |
Genetic parameters for carcass traits and body size of meat sheep |
spellingShingle |
Genetic parameters for carcass traits and body size of meat sheep Sena, Luciano Silva Animal model Heritability Longissimus dorsi Morphometry Selection Variance components. Componentes de variância Herdabilidade Longissimus dorsi Modelo animal Morfometria Seleção. |
title_short |
Genetic parameters for carcass traits and body size of meat sheep |
title_full |
Genetic parameters for carcass traits and body size of meat sheep |
title_fullStr |
Genetic parameters for carcass traits and body size of meat sheep |
title_full_unstemmed |
Genetic parameters for carcass traits and body size of meat sheep |
title_sort |
Genetic parameters for carcass traits and body size of meat sheep |
author |
Sena, Luciano Silva |
author_facet |
Sena, Luciano Silva Santos, Gleyson Vieira dos Torres, Tatiana Saraiva Sousa Júnior, Antônio de Rego Neto, Aurino de Araújo Sarmento, José Lindenberg Rocha Biagiotti, Daniel |
author_role |
author |
author2 |
Santos, Gleyson Vieira dos Torres, Tatiana Saraiva Sousa Júnior, Antônio de Rego Neto, Aurino de Araújo Sarmento, José Lindenberg Rocha Biagiotti, Daniel |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Sena, Luciano Silva Santos, Gleyson Vieira dos Torres, Tatiana Saraiva Sousa Júnior, Antônio de Rego Neto, Aurino de Araújo Sarmento, José Lindenberg Rocha Biagiotti, Daniel |
dc.subject.por.fl_str_mv |
Animal model Heritability Longissimus dorsi Morphometry Selection Variance components. Componentes de variância Herdabilidade Longissimus dorsi Modelo animal Morfometria Seleção. |
topic |
Animal model Heritability Longissimus dorsi Morphometry Selection Variance components. Componentes de variância Herdabilidade Longissimus dorsi Modelo animal Morfometria Seleção. |
description |
The present study aimed to estimate variance components and heritability coefficients (h2) in Santa Inês sheep by single- and two-trait analyses for the traits loin eye area (LEA), length (LEL) and maximum depth (LED), in the longissimus dorsi muscle, subcutaneous fat thickness (SFT), fat thickness over the biceps femoris muscle (FTBF), croup height (CH), thoracic circumference (TC), thoracic depth (TD), body length (BL), and adult live weight (ALW). The restricted maximum likelihood (REML) was used to estimate variance components in an animal model. In both types of analyses, we estimated moderate heritability for all traits, with the exception of SFT, CH, TC, BL, and ALW (all of which yielded low h2 estimates). In two-trait analysis for body size, only TD yielded a lower h2 estimate, when compared to single-trait analysis. On the other hand, CH, TC, and BL yielded higher h2 estimates. Most estimates for variance components and h2 in two-trait analysis were higher than those in single-trait analysis. This finding suggests the possibility of a moderate response to selection for improvement in the carcass of meat sheep using the specific carcass traits evaluated (except SFT), highlighting LEA. The fat thickness over the biceps femoris muscle showed higher potential for response to direct selection for fat deposition than SFT. Thoracic depth showed higher potential for response to direct selection for body size than the other morphometric measurements. In the present study, adult live weight was not an effective criterion for direct selection. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-02 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa Empírica de Campo |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23056 10.5433/1679-0359.2016v37n4Supl1p2477 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23056 |
identifier_str_mv |
10.5433/1679-0359.2016v37n4Supl1p2477 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23056/19595 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 37 No. 4Supl1 (2016); 2477-2486 Semina: Ciências Agrárias; v. 37 n. 4Supl1 (2016); 2477-2486 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306074606534656 |