Genetic trends for mature body weight, visual scores, and growth traits in Nellore cattle
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
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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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 |
|
_version_ |
1749140551226097664 |