Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle

Detalhes bibliográficos
Autor(a) principal: Koetz Júnior,Celso
Data de Publicação: 2017
Outros Autores: Roso,Vanerlei Mozaquatro, Claus,Luís Afonso Marques, Oliveira,Rui Paulo Lopes de, Fávaro,Patrícia da Cruz, Borges,Marcelo Henrique Favaro, Barcellos,Júlio Otavio Jardim, Ribeiro,Edson Luís de Azambuja
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ciência Rural
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300652
Resumo: ABSTRACT: Mature weight (MW) of cows is related to the costs of their production. Usually, cows with moderate MW are more efficient in challenging environments, such as those available in the production systems in Brazil. In the present study, the selection index comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, WM) yearling (YC, YP and YM), scrotal circumference at yearling (SC), days to gain 160kg from birth to weaning (D160) and 240kg after weaning (D240). This are related to birth weight gain at weaning (WG) and from weaning to yearling (YG). The mature (MW) and birth weight (BW) traits were not considered in the selection index. The aim of this study was to estimate the values for the genetic trends (GT) of some important selection (MW) and economic traits (BW). A bi-character analysis of MW and other characteristics was performed to estimate the (co)variance components and genetic parameters. The GT results obtained for MW were null (0.0065% or 0.02718kg per year) in the period 1990-2007. The GT values were determined for BW (-0.0650% or -0.02017kg), WG (0.0758% or 0.0865kg), YG (0.1051% or 0.11377kg), and MW (0.0393% or 0.11276kg) per year. The visual score values (in score units) were also determined for GTat weaning [WC (0.2310%; 0.00707), WP (0.3624%; 0.3623%),aWM (0.01149; 0.01087)] yearling [YC (0.3256%; 0.00990), YP (0.4795%; 0.01496),YM (0.5041%; 0.01457)] per year. Index-based selection was effective to promote genetic progress in WG, WC, WP, WM, YG, YC, YP, and YM characteristics keeping BW and MW constant.
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spelling Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattlebeef cattleproductive traitsselectionABSTRACT: Mature weight (MW) of cows is related to the costs of their production. Usually, cows with moderate MW are more efficient in challenging environments, such as those available in the production systems in Brazil. In the present study, the selection index comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, WM) yearling (YC, YP and YM), scrotal circumference at yearling (SC), days to gain 160kg from birth to weaning (D160) and 240kg after weaning (D240). This are related to birth weight gain at weaning (WG) and from weaning to yearling (YG). The mature (MW) and birth weight (BW) traits were not considered in the selection index. The aim of this study was to estimate the values for the genetic trends (GT) of some important selection (MW) and economic traits (BW). A bi-character analysis of MW and other characteristics was performed to estimate the (co)variance components and genetic parameters. The GT results obtained for MW were null (0.0065% or 0.02718kg per year) in the period 1990-2007. The GT values were determined for BW (-0.0650% or -0.02017kg), WG (0.0758% or 0.0865kg), YG (0.1051% or 0.11377kg), and MW (0.0393% or 0.11276kg) per year. The visual score values (in score units) were also determined for GTat weaning [WC (0.2310%; 0.00707), WP (0.3624%; 0.3623%),aWM (0.01149; 0.01087)] yearling [YC (0.3256%; 0.00990), YP (0.4795%; 0.01496),YM (0.5041%; 0.01457)] per year. Index-based selection was effective to promote genetic progress in WG, WC, WP, WM, YG, YC, YP, and YM characteristics keeping BW and MW constant.Universidade Federal de Santa Maria2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300652Ciência Rural v.47 n.3 2017reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20151506info:eu-repo/semantics/openAccessKoetz Júnior,CelsoRoso,Vanerlei MozaquatroClaus,Luís Afonso MarquesOliveira,Rui Paulo Lopes deFávaro,Patrícia da CruzBorges,Marcelo Henrique FavaroBarcellos,Júlio Otavio JardimRibeiro,Edson Luís de Azambujaeng2017-01-09T00:00:00ZRevista
dc.title.none.fl_str_mv Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
title Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
spellingShingle Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
Koetz Júnior,Celso
beef cattle
productive traits
selection
title_short Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
title_full Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
title_fullStr Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
title_full_unstemmed Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
title_sort Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
author Koetz Júnior,Celso
author_facet Koetz Júnior,Celso
Roso,Vanerlei Mozaquatro
Claus,Luís Afonso Marques
Oliveira,Rui Paulo Lopes de
Fávaro,Patrícia da Cruz
Borges,Marcelo Henrique Favaro
Barcellos,Júlio Otavio Jardim
Ribeiro,Edson Luís de Azambuja
author_role author
author2 Roso,Vanerlei Mozaquatro
Claus,Luís Afonso Marques
Oliveira,Rui Paulo Lopes de
Fávaro,Patrícia da Cruz
Borges,Marcelo Henrique Favaro
Barcellos,Júlio Otavio Jardim
Ribeiro,Edson Luís de Azambuja
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Koetz Júnior,Celso
Roso,Vanerlei Mozaquatro
Claus,Luís Afonso Marques
Oliveira,Rui Paulo Lopes de
Fávaro,Patrícia da Cruz
Borges,Marcelo Henrique Favaro
Barcellos,Júlio Otavio Jardim
Ribeiro,Edson Luís de Azambuja
dc.subject.por.fl_str_mv beef cattle
productive traits
selection
topic beef cattle
productive traits
selection
description ABSTRACT: Mature weight (MW) of cows is related to the costs of their production. Usually, cows with moderate MW are more efficient in challenging environments, such as those available in the production systems in Brazil. In the present study, the selection index comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, WM) yearling (YC, YP and YM), scrotal circumference at yearling (SC), days to gain 160kg from birth to weaning (D160) and 240kg after weaning (D240). This are related to birth weight gain at weaning (WG) and from weaning to yearling (YG). The mature (MW) and birth weight (BW) traits were not considered in the selection index. The aim of this study was to estimate the values for the genetic trends (GT) of some important selection (MW) and economic traits (BW). A bi-character analysis of MW and other characteristics was performed to estimate the (co)variance components and genetic parameters. The GT results obtained for MW were null (0.0065% or 0.02718kg per year) in the period 1990-2007. The GT values were determined for BW (-0.0650% or -0.02017kg), WG (0.0758% or 0.0865kg), YG (0.1051% or 0.11377kg), and MW (0.0393% or 0.11276kg) per year. The visual score values (in score units) were also determined for GTat weaning [WC (0.2310%; 0.00707), WP (0.3624%; 0.3623%),aWM (0.01149; 0.01087)] yearling [YC (0.3256%; 0.00990), YP (0.4795%; 0.01496),YM (0.5041%; 0.01457)] per year. Index-based selection was effective to promote genetic progress in WG, WC, WP, WM, YG, YC, YP, and YM characteristics keeping BW and MW constant.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
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=S0103-84782017000300652
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300652
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0103-8478cr20151506
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 Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural v.47 n.3 2017
reponame:Ciência Rural
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Rural
collection Ciência Rural
repository.name.fl_str_mv
repository.mail.fl_str_mv
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