Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0103-84782011005000060 http://hdl.handle.net/11449/14291 |
Resumo: | It was evaluated the heterogeneity of components of phenotypic variance and its effects on the heritability and repeatability estimates for milk yield in Holstein cattle. The herds were grouped according to their level of production (low, medium and high) and evaluated in the non-transformed, square-root and logarithmic scale. Variance components were estimated using a restricted maximum likelihood method based on an animal model that included fixed effects of herd-year-season, and as covariates the linear effect of lactation duration and the linear and quadratic effects of cow's age at calving and the random direct additive genetic, permanent environment and residual effects. In the non-transformed scale all the variance components were heterogeneous. on this scale, residual and phenotypic variance components were associated positively with the level of production while in logarithmic scale that association was negative. Estimates of heritability were more affected than the repeatability for the phenotypic variance heterogeneity and their components. The of selection process efficiency for milk production could be affected by the level of production which was considered for genetic parameters estimation. |
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Repositório Institucional da UNESP |
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Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidadeHeterogeneity of variance components in milk production and their effects on estimates of heritability and repeatabilityDairy cattleGenetic parameterheterocedasticityIt was evaluated the heterogeneity of components of phenotypic variance and its effects on the heritability and repeatability estimates for milk yield in Holstein cattle. The herds were grouped according to their level of production (low, medium and high) and evaluated in the non-transformed, square-root and logarithmic scale. Variance components were estimated using a restricted maximum likelihood method based on an animal model that included fixed effects of herd-year-season, and as covariates the linear effect of lactation duration and the linear and quadratic effects of cow's age at calving and the random direct additive genetic, permanent environment and residual effects. In the non-transformed scale all the variance components were heterogeneous. on this scale, residual and phenotypic variance components were associated positively with the level of production while in logarithmic scale that association was negative. Estimates of heritability were more affected than the repeatability for the phenotypic variance heterogeneity and their components. The of selection process efficiency for milk production could be affected by the level of production which was considered for genetic parameters estimation.Univ Estadual Paulista Julio de MesquitaFilho UNE, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, BrazilUNESP, FMVZ, Dept Anim Prod, Botucatu, SP, BrazilUNESP, FCAV, Dept Zootecnia, Jaboticabal, SP, BrazilUniv Estadual Paulista Julio de MesquitaFilho UNE, FCAV, Dept Ciencias Exatas, BR-14884900 Jaboticabal, SP, BrazilUNESP, FMVZ, Dept Anim Prod, Botucatu, SP, BrazilUNESP, FCAV, Dept Zootecnia, Jaboticabal, SP, BrazilUniversidade Federal de Santa Maria (UFSM)Universidade Estadual Paulista (Unesp)Valencia Tapia, Elmer Francisco [UNESP]Ramos, Alcides de Amorim [UNESP]Wechsler, Francisco Stefano [UNESP]Lui, Jeffrey Frederico [UNESP]Grupioni, Natalia Vinhal [UNESP]Ramos, Salvador Boccaletti [UNESP]Munari, Dansio Prado [UNESP]2013-09-30T17:50:25Z2014-05-20T13:41:14Z2013-09-30T17:50:25Z2014-05-20T13:41:14Z2011-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1070-1075http://dx.doi.org/10.1590/S0103-84782011005000060Ciência Rural. Santa Maria: Universidade Federal de Santa Maria (UFSM), v. 41, n. 6, p. 1070-1075, 2011.0103-8478http://hdl.handle.net/11449/14291WOS:0002927771000242024359465492863Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporCiência Rural0.5250,337info:eu-repo/semantics/openAccess2021-10-22T17:43:23Zoai:repositorio.unesp.br:11449/14291Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T17:43:23Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade Heterogeneity of variance components in milk production and their effects on estimates of heritability and repeatability |
title |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
spellingShingle |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade Valencia Tapia, Elmer Francisco [UNESP] Dairy cattle Genetic parameter heterocedasticity |
title_short |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
title_full |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
title_fullStr |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
title_full_unstemmed |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
title_sort |
Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade |
author |
Valencia Tapia, Elmer Francisco [UNESP] |
author_facet |
Valencia Tapia, Elmer Francisco [UNESP] Ramos, Alcides de Amorim [UNESP] Wechsler, Francisco Stefano [UNESP] Lui, Jeffrey Frederico [UNESP] Grupioni, Natalia Vinhal [UNESP] Ramos, Salvador Boccaletti [UNESP] Munari, Dansio Prado [UNESP] |
author_role |
author |
author2 |
Ramos, Alcides de Amorim [UNESP] Wechsler, Francisco Stefano [UNESP] Lui, Jeffrey Frederico [UNESP] Grupioni, Natalia Vinhal [UNESP] Ramos, Salvador Boccaletti [UNESP] Munari, Dansio Prado [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Valencia Tapia, Elmer Francisco [UNESP] Ramos, Alcides de Amorim [UNESP] Wechsler, Francisco Stefano [UNESP] Lui, Jeffrey Frederico [UNESP] Grupioni, Natalia Vinhal [UNESP] Ramos, Salvador Boccaletti [UNESP] Munari, Dansio Prado [UNESP] |
dc.subject.por.fl_str_mv |
Dairy cattle Genetic parameter heterocedasticity |
topic |
Dairy cattle Genetic parameter heterocedasticity |
description |
It was evaluated the heterogeneity of components of phenotypic variance and its effects on the heritability and repeatability estimates for milk yield in Holstein cattle. The herds were grouped according to their level of production (low, medium and high) and evaluated in the non-transformed, square-root and logarithmic scale. Variance components were estimated using a restricted maximum likelihood method based on an animal model that included fixed effects of herd-year-season, and as covariates the linear effect of lactation duration and the linear and quadratic effects of cow's age at calving and the random direct additive genetic, permanent environment and residual effects. In the non-transformed scale all the variance components were heterogeneous. on this scale, residual and phenotypic variance components were associated positively with the level of production while in logarithmic scale that association was negative. Estimates of heritability were more affected than the repeatability for the phenotypic variance heterogeneity and their components. The of selection process efficiency for milk production could be affected by the level of production which was considered for genetic parameters estimation. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-06-01 2013-09-30T17:50:25Z 2013-09-30T17:50:25Z 2014-05-20T13:41:14Z 2014-05-20T13:41:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0103-84782011005000060 Ciência Rural. Santa Maria: Universidade Federal de Santa Maria (UFSM), v. 41, n. 6, p. 1070-1075, 2011. 0103-8478 http://hdl.handle.net/11449/14291 WOS:000292777100024 2024359465492863 |
url |
http://dx.doi.org/10.1590/S0103-84782011005000060 http://hdl.handle.net/11449/14291 |
identifier_str_mv |
Ciência Rural. Santa Maria: Universidade Federal de Santa Maria (UFSM), v. 41, n. 6, p. 1070-1075, 2011. 0103-8478 WOS:000292777100024 2024359465492863 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Ciência Rural 0.525 0,337 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1070-1075 |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria (UFSM) |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria (UFSM) |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965614066892800 |