Components of (co)variance of the days open in Siboney dairy cows
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Arquivo brasileiro de medicina veterinária e zootecnia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000100019 |
Resumo: | The records of 63,406 calvings of Siboney dairy cows (5/8 Holstein 3/8 Cuban Zebu) were used to estimate the components of covariance of the days open (DO). Five models were used: of repeatability; univariate; bivariate; of random regression with Legendre polynomials and the parity number as predicting variable; and a model of random regression with Legendre polynomials and heterogeneity of the residual variance. The heritability obtained with the univariate model was 0.09 in the first calving and decreased to 0.05 in the fifth. A higher estimate of heritability (0.12) was obtained with the repeatability model. When the model of random regression with heterogeneity of the residual variance was used, the heritability was higher than the values estimated with the previous models. The genetic correlations among the DO in different calvings, estimated with the models of random regression with and without heterogeneity of the residual variance, were close to 1.0. It is concluded that the estimates of heritability increased with the use of the random regression models. The genetic correlations among the DO of different calvings indicated that in the first three, the DO are regulated for the most part by the same genes. |
id |
UFMG-8_f238624242f5bbff67717c1858e14a76 |
---|---|
oai_identifier_str |
oai:scielo:S0102-09352010000100019 |
network_acronym_str |
UFMG-8 |
network_name_str |
Arquivo brasileiro de medicina veterinária e zootecnia (Online) |
repository_id_str |
|
spelling |
Components of (co)variance of the days open in Siboney dairy cowsdairy cowgenetic correlationsheritabilitypostpartum intervaldays openThe records of 63,406 calvings of Siboney dairy cows (5/8 Holstein 3/8 Cuban Zebu) were used to estimate the components of covariance of the days open (DO). Five models were used: of repeatability; univariate; bivariate; of random regression with Legendre polynomials and the parity number as predicting variable; and a model of random regression with Legendre polynomials and heterogeneity of the residual variance. The heritability obtained with the univariate model was 0.09 in the first calving and decreased to 0.05 in the fifth. A higher estimate of heritability (0.12) was obtained with the repeatability model. When the model of random regression with heterogeneity of the residual variance was used, the heritability was higher than the values estimated with the previous models. The genetic correlations among the DO in different calvings, estimated with the models of random regression with and without heterogeneity of the residual variance, were close to 1.0. It is concluded that the estimates of heritability increased with the use of the random regression models. The genetic correlations among the DO of different calvings indicated that in the first three, the DO are regulated for the most part by the same genes.Universidade Federal de Minas Gerais, Escola de Veterinária2010-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000100019Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.62 n.1 2010reponame:Arquivo brasileiro de medicina veterinária e zootecnia (Online)instname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMG10.1590/S0102-09352010000100019info:eu-repo/semantics/openAccessGonzález-Peña,D.Espinoza-Villavicencio,J.L.Guerra,D.Palacios,A.Évora,J.C.Portales,A.eng2010-03-23T00:00:00Zoai:scielo:S0102-09352010000100019Revistahttps://www.scielo.br/j/abmvz/PUBhttps://old.scielo.br/oai/scielo-oai.phpjournal@vet.ufmg.br||abmvz.artigo@abmvz.org.br1678-41620102-0935opendoar:2010-03-23T00:00Arquivo brasileiro de medicina veterinária e zootecnia (Online) - Universidade Federal de Minas Gerais (UFMG)false |
dc.title.none.fl_str_mv |
Components of (co)variance of the days open in Siboney dairy cows |
title |
Components of (co)variance of the days open in Siboney dairy cows |
spellingShingle |
Components of (co)variance of the days open in Siboney dairy cows González-Peña,D. dairy cow genetic correlations heritability postpartum interval days open |
title_short |
Components of (co)variance of the days open in Siboney dairy cows |
title_full |
Components of (co)variance of the days open in Siboney dairy cows |
title_fullStr |
Components of (co)variance of the days open in Siboney dairy cows |
title_full_unstemmed |
Components of (co)variance of the days open in Siboney dairy cows |
title_sort |
Components of (co)variance of the days open in Siboney dairy cows |
author |
González-Peña,D. |
author_facet |
González-Peña,D. Espinoza-Villavicencio,J.L. Guerra,D. Palacios,A. Évora,J.C. Portales,A. |
author_role |
author |
author2 |
Espinoza-Villavicencio,J.L. Guerra,D. Palacios,A. Évora,J.C. Portales,A. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
González-Peña,D. Espinoza-Villavicencio,J.L. Guerra,D. Palacios,A. Évora,J.C. Portales,A. |
dc.subject.por.fl_str_mv |
dairy cow genetic correlations heritability postpartum interval days open |
topic |
dairy cow genetic correlations heritability postpartum interval days open |
description |
The records of 63,406 calvings of Siboney dairy cows (5/8 Holstein 3/8 Cuban Zebu) were used to estimate the components of covariance of the days open (DO). Five models were used: of repeatability; univariate; bivariate; of random regression with Legendre polynomials and the parity number as predicting variable; and a model of random regression with Legendre polynomials and heterogeneity of the residual variance. The heritability obtained with the univariate model was 0.09 in the first calving and decreased to 0.05 in the fifth. A higher estimate of heritability (0.12) was obtained with the repeatability model. When the model of random regression with heterogeneity of the residual variance was used, the heritability was higher than the values estimated with the previous models. The genetic correlations among the DO in different calvings, estimated with the models of random regression with and without heterogeneity of the residual variance, were close to 1.0. It is concluded that the estimates of heritability increased with the use of the random regression models. The genetic correlations among the DO of different calvings indicated that in the first three, the DO are regulated for the most part by the same genes. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-02-01 |
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=S0102-09352010000100019 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000100019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0102-09352010000100019 |
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 Minas Gerais, Escola de Veterinária |
publisher.none.fl_str_mv |
Universidade Federal de Minas Gerais, Escola de Veterinária |
dc.source.none.fl_str_mv |
Arquivo Brasileiro de Medicina Veterinária e Zootecnia v.62 n.1 2010 reponame:Arquivo brasileiro de medicina veterinária e zootecnia (Online) instname:Universidade Federal de Minas Gerais (UFMG) instacron:UFMG |
instname_str |
Universidade Federal de Minas Gerais (UFMG) |
instacron_str |
UFMG |
institution |
UFMG |
reponame_str |
Arquivo brasileiro de medicina veterinária e zootecnia (Online) |
collection |
Arquivo brasileiro de medicina veterinária e zootecnia (Online) |
repository.name.fl_str_mv |
Arquivo brasileiro de medicina veterinária e zootecnia (Online) - Universidade Federal de Minas Gerais (UFMG) |
repository.mail.fl_str_mv |
journal@vet.ufmg.br||abmvz.artigo@abmvz.org.br |
_version_ |
1750220883260080128 |