Principal component analysis of pre-weaning growth traits in Santa Inês lambs
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/35394 |
Resumo: | The aim of this study was to evaluate the interrelation among growth traits in Santa Inês lambs using principal component analysis. Data on 270 lambs born between 2008 and 2013 were used. The variables studied were weight at birth,adjusted weight from birth to weaning, and average daily gains at 14, 28, 52, and 70 days of age. The wither height, thoracic perimeter, and length at birth and adjusted at 28 and 70 days of age (weaning), were also used. The statistical model comprised the fixed effects of the contemporary group, the linear effect of julian date at birth, and the linear and quadratic effects of lambing weight. The first principal component explained approximately 89% and 85% of the total variation for body weight at different ages and average daily gains, respectively. The second principal component compared heavier animals or those that gained more weight at 14 days with lighter lambs or those that gained less weight at 14 days of age and explains the variation of approximately 5% and 10%, respectively, among the animals. The first principal component accounted for 77%, 91%, and 77% of the variation for weight, thoracic perimeter, wither height, and length at birth, 28 days, and 70 days of age, respectively, and compared large animals or animals with greater body volume. The second component, with values of 16%, 6%, and 14% of the total variation at the three ages, respectively, compared animals with distinct conformation to discriminate animals of different shapes and verified that the weights at the different ages and the thoracic perimeter are important sources of variability among the animals. |
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Semina. Ciências Agrárias (Online) |
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Principal component analysis of pre-weaning growth traits in Santa Inês lambsAnálise de componentes principais para características de crescimento pré-desmame em ovinos da raça Santa InêsBiometric measuresMultivariate analysisSelection.Weights.Análise multivariadaMedidas biométricasPesosSeleção.The aim of this study was to evaluate the interrelation among growth traits in Santa Inês lambs using principal component analysis. Data on 270 lambs born between 2008 and 2013 were used. The variables studied were weight at birth,adjusted weight from birth to weaning, and average daily gains at 14, 28, 52, and 70 days of age. The wither height, thoracic perimeter, and length at birth and adjusted at 28 and 70 days of age (weaning), were also used. The statistical model comprised the fixed effects of the contemporary group, the linear effect of julian date at birth, and the linear and quadratic effects of lambing weight. The first principal component explained approximately 89% and 85% of the total variation for body weight at different ages and average daily gains, respectively. The second principal component compared heavier animals or those that gained more weight at 14 days with lighter lambs or those that gained less weight at 14 days of age and explains the variation of approximately 5% and 10%, respectively, among the animals. The first principal component accounted for 77%, 91%, and 77% of the variation for weight, thoracic perimeter, wither height, and length at birth, 28 days, and 70 days of age, respectively, and compared large animals or animals with greater body volume. The second component, with values of 16%, 6%, and 14% of the total variation at the three ages, respectively, compared animals with distinct conformation to discriminate animals of different shapes and verified that the weights at the different ages and the thoracic perimeter are important sources of variability among the animals.Objetivou-se com este trabalho avaliar as inter-relações entre as medidas de crescimento em cordeiros da raça Santa Inês no período pré-desmame, utilizando-se a técnica dos componentes principais. Para tanto, contou-se com informações de 270 cordeiros, nascidos entre 2008 e 2013. As variáveis estudadas foram o peso ao nascimento, os pesos corrigidos e ganhos médios diários aos 14, 28, 52 e 70 dias de idade. Foram utilizadas as medidas, altura de cernelha, perímetro torácico e comprimento ao nascimento e corrigidas para os 28 e 70 dias de idade de cordeiros Santa Inês. O modelo estatístico utilizado na análise por componentes principais para todas as características estudadas incluiu os efeitos de grupo de contemporâneos, o efeito linear da data juliana de nascimento e os efeitos linear e quadrático do peso da ovelha ao parto. Para os pesos às diferentes idades e os ganhos médios diários o primeiro componente principal acumulou 89% e 85% da variação total, respectivamente. O segundo componente contrastou animais mais pesados ou ganharam mais peso aos 14 dias com aqueles que foram mais leves ou ganharam menos pesos nas demais idades, explicando 5 e 10% da variabilidade entre os animais. Para as medidas de peso, perímetro torácico, altura de cernelha e comprimento ao nascimento, aos 28 dias de idade e aos 70 dias de idade, o primeiro componente, que acumulou 77%, 91% e 77% da variabilidade existente, respectivamente, comparou animais de maior tamanho ou volume corporal. O segundo componente, com 16%, 6% e 14%, respectivamente da variabilidade total, comparou animais de diferentes conformações e verificou-se que os pesos nas diferentes idades e o perímetro torácico são importantes fontes de variabilidade entre os animais.UEL2019-09-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionpesquisa científicaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3539410.5433/1679-0359.2019v40n6Supl2p3269Semina: Ciências Agrárias; Vol. 40 No. 6Supl2 (2019); 3269-3278Semina: Ciências Agrárias; v. 40 n. 6Supl2 (2019); 3269-32781679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35394/26147Copyright (c) 2019 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessKoritiaki, Natália AlbieriRibeiro, Edson Luis de AzambujaMuniz, Carolina Amália Souza DantasMarestone, Bruna SilvaFernandes Junior, Francisco2022-10-10T16:28:25Zoai:ojs.pkp.sfu.ca:article/35394Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-10T16:28:25Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs Análise de componentes principais para características de crescimento pré-desmame em ovinos da raça Santa Inês |
title |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
spellingShingle |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs Koritiaki, Natália Albieri Biometric measures Multivariate analysis Selection.Weights. Análise multivariada Medidas biométricas Pesos Seleção. |
title_short |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
title_full |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
title_fullStr |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
title_full_unstemmed |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
title_sort |
Principal component analysis of pre-weaning growth traits in Santa Inês lambs |
author |
Koritiaki, Natália Albieri |
author_facet |
Koritiaki, Natália Albieri Ribeiro, Edson Luis de Azambuja Muniz, Carolina Amália Souza Dantas Marestone, Bruna Silva Fernandes Junior, Francisco |
author_role |
author |
author2 |
Ribeiro, Edson Luis de Azambuja Muniz, Carolina Amália Souza Dantas Marestone, Bruna Silva Fernandes Junior, Francisco |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Koritiaki, Natália Albieri Ribeiro, Edson Luis de Azambuja Muniz, Carolina Amália Souza Dantas Marestone, Bruna Silva Fernandes Junior, Francisco |
dc.subject.por.fl_str_mv |
Biometric measures Multivariate analysis Selection.Weights. Análise multivariada Medidas biométricas Pesos Seleção. |
topic |
Biometric measures Multivariate analysis Selection.Weights. Análise multivariada Medidas biométricas Pesos Seleção. |
description |
The aim of this study was to evaluate the interrelation among growth traits in Santa Inês lambs using principal component analysis. Data on 270 lambs born between 2008 and 2013 were used. The variables studied were weight at birth,adjusted weight from birth to weaning, and average daily gains at 14, 28, 52, and 70 days of age. The wither height, thoracic perimeter, and length at birth and adjusted at 28 and 70 days of age (weaning), were also used. The statistical model comprised the fixed effects of the contemporary group, the linear effect of julian date at birth, and the linear and quadratic effects of lambing weight. The first principal component explained approximately 89% and 85% of the total variation for body weight at different ages and average daily gains, respectively. The second principal component compared heavier animals or those that gained more weight at 14 days with lighter lambs or those that gained less weight at 14 days of age and explains the variation of approximately 5% and 10%, respectively, among the animals. The first principal component accounted for 77%, 91%, and 77% of the variation for weight, thoracic perimeter, wither height, and length at birth, 28 days, and 70 days of age, respectively, and compared large animals or animals with greater body volume. The second component, with values of 16%, 6%, and 14% of the total variation at the three ages, respectively, compared animals with distinct conformation to discriminate animals of different shapes and verified that the weights at the different ages and the thoracic perimeter are important sources of variability among the animals. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion pesquisa científica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35394 10.5433/1679-0359.2019v40n6Supl2p3269 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/35394 |
identifier_str_mv |
10.5433/1679-0359.2019v40n6Supl2p3269 |
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/35394/26147 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Semina: Ciências Agrárias 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. 40 No. 6Supl2 (2019); 3269-3278 Semina: Ciências Agrárias; v. 40 n. 6Supl2 (2019); 3269-3278 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_ |
1799306081063665664 |