REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência e Agrotecnologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400355 |
Resumo: | Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to reproductive efficiency.Thus, it is necessary to study the effectiveness of selection and quantify genetic gain for these traits in herds. This study estimated genetic and phenotypic parameters and genetic trends for reproductive traits used in breeding programs for Nelore beef cattle. The traits studied were the scrotal circumference (SC) at 365 and 450 days of age (SC365 and SC450), age at first calving (AFC) and gestation length, as a cow trait (GLcow) and a calf trait (GLcalf). The (co)variance components were obtained with the Restricted Maximum Likelihood Methodology in a single and double-trait analysis of the animal model. For scrotal circumference (SC365 and SC450), positive and favorable genetic gains were observed. For AFC, GLcow and GLcalf, the trends were favorable for selection, but without significant genetic gain. Selection for large SC may reduce AFC and improve female reproductive efficiency. The selection for reproductive traits (SC365, SC450, AFC and GL) may improve reproductive and productive efficiency of Nelore cattle, if used as a selection criterion. |
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Ciência e Agrotecnologia (Online) |
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REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLEReproductive efficiencygenetic evaluationprecocityGenetic breeding programs of beef cattle in Brazil are including new features, mainly related to reproductive efficiency.Thus, it is necessary to study the effectiveness of selection and quantify genetic gain for these traits in herds. This study estimated genetic and phenotypic parameters and genetic trends for reproductive traits used in breeding programs for Nelore beef cattle. The traits studied were the scrotal circumference (SC) at 365 and 450 days of age (SC365 and SC450), age at first calving (AFC) and gestation length, as a cow trait (GLcow) and a calf trait (GLcalf). The (co)variance components were obtained with the Restricted Maximum Likelihood Methodology in a single and double-trait analysis of the animal model. For scrotal circumference (SC365 and SC450), positive and favorable genetic gains were observed. For AFC, GLcow and GLcalf, the trends were favorable for selection, but without significant genetic gain. Selection for large SC may reduce AFC and improve female reproductive efficiency. The selection for reproductive traits (SC365, SC450, AFC and GL) may improve reproductive and productive efficiency of Nelore cattle, if used as a selection criterion.Editora da UFLA2015-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400355Ciência e Agrotecnologia v.39 n.4 2015reponame:Ciência e Agrotecnologia (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLA10.1590/S1413-70542015000400006info:eu-repo/semantics/openAccessMoreira,Heverton LuisBuzanskas,Marcos EliMunari,Danisio PradoCanova,Érika BredaLôbo,Raysildo BarbosaPaz,Claudia Cristina Paro deeng2015-07-22T00:00:00Zoai:scielo:S1413-70542015000400355Revistahttp://www.scielo.br/cagroPUBhttps://old.scielo.br/oai/scielo-oai.php||renpaiva@dbi.ufla.br|| editora@editora.ufla.br1981-18291413-7054opendoar:2022-11-22T16:31:24.904372Ciência e Agrotecnologia (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
title |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
spellingShingle |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE Moreira,Heverton Luis Reproductive efficiency genetic evaluation precocity |
title_short |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
title_full |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
title_fullStr |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
title_full_unstemmed |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
title_sort |
REPRODUCTIVE TRAITS SELECTION IN NELORE BEEF CATTLE |
author |
Moreira,Heverton Luis |
author_facet |
Moreira,Heverton Luis Buzanskas,Marcos Eli Munari,Danisio Prado Canova,Érika Breda Lôbo,Raysildo Barbosa Paz,Claudia Cristina Paro de |
author_role |
author |
author2 |
Buzanskas,Marcos Eli Munari,Danisio Prado Canova,Érika Breda Lôbo,Raysildo Barbosa Paz,Claudia Cristina Paro de |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Moreira,Heverton Luis Buzanskas,Marcos Eli Munari,Danisio Prado Canova,Érika Breda Lôbo,Raysildo Barbosa Paz,Claudia Cristina Paro de |
dc.subject.por.fl_str_mv |
Reproductive efficiency genetic evaluation precocity |
topic |
Reproductive efficiency genetic evaluation precocity |
description |
Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to reproductive efficiency.Thus, it is necessary to study the effectiveness of selection and quantify genetic gain for these traits in herds. This study estimated genetic and phenotypic parameters and genetic trends for reproductive traits used in breeding programs for Nelore beef cattle. The traits studied were the scrotal circumference (SC) at 365 and 450 days of age (SC365 and SC450), age at first calving (AFC) and gestation length, as a cow trait (GLcow) and a calf trait (GLcalf). The (co)variance components were obtained with the Restricted Maximum Likelihood Methodology in a single and double-trait analysis of the animal model. For scrotal circumference (SC365 and SC450), positive and favorable genetic gains were observed. For AFC, GLcow and GLcalf, the trends were favorable for selection, but without significant genetic gain. Selection for large SC may reduce AFC and improve female reproductive efficiency. The selection for reproductive traits (SC365, SC450, AFC and GL) may improve reproductive and productive efficiency of Nelore cattle, if used as a selection criterion. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-01 |
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=S1413-70542015000400355 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400355 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1413-70542015000400006 |
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 |
Editora da UFLA |
publisher.none.fl_str_mv |
Editora da UFLA |
dc.source.none.fl_str_mv |
Ciência e Agrotecnologia v.39 n.4 2015 reponame:Ciência e Agrotecnologia (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Ciência e Agrotecnologia (Online) |
collection |
Ciência e Agrotecnologia (Online) |
repository.name.fl_str_mv |
Ciência e Agrotecnologia (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
||renpaiva@dbi.ufla.br|| editora@editora.ufla.br |
_version_ |
1799874969832783872 |