Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4081/ijas.2007.s2.368 http://hdl.handle.net/11449/226031 |
Resumo: | The objectives of this study were to estimate genetic parameters for testday milk, fat and protein yields, in Murrah buffaloes. In this study 4,757 complete lactations of Murrah buffaloes were analyzed. The (co) variance components were estimated by restricted maximum likelihood using MTDFREML software. The bi-trait animal test-day models included genetic additive direct and permanent environment effects, as random effects, and the fixed effects of contemporary group (herds-year-month of control) and age of the cow at calving as linear and quadratic covariable. The heritability estimate at first control was 0.19, increased until the third control (0.24), decreasing thereafter, reaching the lowest value at the ninth control (0.09). The highest heritability estimates for fat and protein yield were 0.23 (first control) and 0.33 (third control), respectively. For milk yield, genetic and phenotypic correlation estimates ranged from 0.37 to 0.99 and from 0.52 to 0.94, respectively. Genetic correlations were higher than phenotypic ones. For fat and protein yields, genetic correlation estimates ranged from 0.42 to 0.97. |
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Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in BrazilGenetic correlation estimatesHeritability estimatesPhenotypic correlation estimatesThe objectives of this study were to estimate genetic parameters for testday milk, fat and protein yields, in Murrah buffaloes. In this study 4,757 complete lactations of Murrah buffaloes were analyzed. The (co) variance components were estimated by restricted maximum likelihood using MTDFREML software. The bi-trait animal test-day models included genetic additive direct and permanent environment effects, as random effects, and the fixed effects of contemporary group (herds-year-month of control) and age of the cow at calving as linear and quadratic covariable. The heritability estimate at first control was 0.19, increased until the third control (0.24), decreasing thereafter, reaching the lowest value at the ninth control (0.09). The highest heritability estimates for fat and protein yield were 0.23 (first control) and 0.33 (third control), respectively. For milk yield, genetic and phenotypic correlation estimates ranged from 0.37 to 0.99 and from 0.52 to 0.94, respectively. Genetic correlations were higher than phenotypic ones. For fat and protein yields, genetic correlation estimates ranged from 0.42 to 0.97.University of São Paulo State FCAV/UNESP Department of Animal Sciences, Jabotical, São Paulo StateLagoa da Serra Company, SertãozinhoUniversity of São Paulo State FCAV/UNESP Department of Animal Sciences, Jabotical, São Paulo StateUniversidade Estadual Paulista (UNESP)Lagoa da Serra CompanyAspilcueta-Borquis, R. [UNESP]Tanaka, A. [UNESP]Albuquerque, L. [UNESP]Sesana, R. [UNESP]Seno, L. [UNESP]Bignardi, A. [UNESP]Tonhati, H. [UNESP]2022-04-28T21:24:26Z2022-04-28T21:24:26Z2007-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article368-371http://dx.doi.org/10.4081/ijas.2007.s2.368Italian Journal of Animal Science, v. 6, n. SUPPL. 2, p. 368-371, 2007.1594-4077http://hdl.handle.net/11449/22603110.4081/ijas.2007.s2.3682-s2.0-77956549166Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengItalian Journal of Animal Scienceinfo:eu-repo/semantics/openAccess2024-06-07T18:45:08Zoai:repositorio.unesp.br:11449/226031Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:07:23.120127Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
title |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
spellingShingle |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil Aspilcueta-Borquis, R. [UNESP] Genetic correlation estimates Heritability estimates Phenotypic correlation estimates |
title_short |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
title_full |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
title_fullStr |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
title_full_unstemmed |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
title_sort |
Genetic parameters estimates for milk, fat and protein yield analyzed by test day models for Murrah buffaloes in Brazil |
author |
Aspilcueta-Borquis, R. [UNESP] |
author_facet |
Aspilcueta-Borquis, R. [UNESP] Tanaka, A. [UNESP] Albuquerque, L. [UNESP] Sesana, R. [UNESP] Seno, L. [UNESP] Bignardi, A. [UNESP] Tonhati, H. [UNESP] |
author_role |
author |
author2 |
Tanaka, A. [UNESP] Albuquerque, L. [UNESP] Sesana, R. [UNESP] Seno, L. [UNESP] Bignardi, A. [UNESP] Tonhati, H. [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Lagoa da Serra Company |
dc.contributor.author.fl_str_mv |
Aspilcueta-Borquis, R. [UNESP] Tanaka, A. [UNESP] Albuquerque, L. [UNESP] Sesana, R. [UNESP] Seno, L. [UNESP] Bignardi, A. [UNESP] Tonhati, H. [UNESP] |
dc.subject.por.fl_str_mv |
Genetic correlation estimates Heritability estimates Phenotypic correlation estimates |
topic |
Genetic correlation estimates Heritability estimates Phenotypic correlation estimates |
description |
The objectives of this study were to estimate genetic parameters for testday milk, fat and protein yields, in Murrah buffaloes. In this study 4,757 complete lactations of Murrah buffaloes were analyzed. The (co) variance components were estimated by restricted maximum likelihood using MTDFREML software. The bi-trait animal test-day models included genetic additive direct and permanent environment effects, as random effects, and the fixed effects of contemporary group (herds-year-month of control) and age of the cow at calving as linear and quadratic covariable. The heritability estimate at first control was 0.19, increased until the third control (0.24), decreasing thereafter, reaching the lowest value at the ninth control (0.09). The highest heritability estimates for fat and protein yield were 0.23 (first control) and 0.33 (third control), respectively. For milk yield, genetic and phenotypic correlation estimates ranged from 0.37 to 0.99 and from 0.52 to 0.94, respectively. Genetic correlations were higher than phenotypic ones. For fat and protein yields, genetic correlation estimates ranged from 0.42 to 0.97. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-12-01 2022-04-28T21:24:26Z 2022-04-28T21:24:26Z |
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/10.4081/ijas.2007.s2.368 Italian Journal of Animal Science, v. 6, n. SUPPL. 2, p. 368-371, 2007. 1594-4077 http://hdl.handle.net/11449/226031 10.4081/ijas.2007.s2.368 2-s2.0-77956549166 |
url |
http://dx.doi.org/10.4081/ijas.2007.s2.368 http://hdl.handle.net/11449/226031 |
identifier_str_mv |
Italian Journal of Animal Science, v. 6, n. SUPPL. 2, p. 368-371, 2007. 1594-4077 10.4081/ijas.2007.s2.368 2-s2.0-77956549166 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Italian Journal of Animal Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
368-371 |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808129586255364096 |