Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/166170 |
Resumo: | This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from –0.23 (top line) to 0.28 (angularity) to age at first calving, from –0.54 (final score) to 0.34 (foot angle) to calving interval, from –0.23 (angularity) to 0.56 (stature) to dry period, and from –0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits. |
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Almeida, Tatiana Prestes deKern, Elisandra LurdesDaltro, Darlene dos SantosBraccini Neto, JoséPimentel, Concepta Margaret McManusThaler Neto, AndréCobuci, Jaime Araújo2017-09-05T02:32:53Z20171516-3598http://hdl.handle.net/10183/166170001027044This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from –0.23 (top line) to 0.28 (angularity) to age at first calving, from –0.54 (final score) to 0.34 (foot angle) to calving interval, from –0.23 (angularity) to 0.56 (stature) to dry period, and from –0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits.application/pdfporRevista brasileira de zootecnia= Brazilian journal of animal science. Viçosa, MG. Vol. 46, n. 2 (fev. 2017), p. 91-98Genética animalReprodução animalAge at first calvingDairy cattleGenetic parametersReproductive efficiencyGenetic associations between reproductive and linear-type traits of Holstein cows in Brazilinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001027044.pdf001027044.pdfTexto completoapplication/pdf1274827http://www.lume.ufrgs.br/bitstream/10183/166170/1/001027044.pdfa5eca74a996110fb1a098e9db9a9bdcfMD51TEXT001027044.pdf.txt001027044.pdf.txtExtracted Texttext/plain38768http://www.lume.ufrgs.br/bitstream/10183/166170/2/001027044.pdf.txtb24bc26e8c58b06050dd70ff282d770cMD52THUMBNAIL001027044.pdf.jpg001027044.pdf.jpgGenerated Thumbnailimage/jpeg2218http://www.lume.ufrgs.br/bitstream/10183/166170/3/001027044.pdf.jpgae23d3d3800b1d44a38e4846f6b3aa88MD5310183/1661702019-01-17 04:25:48.976569oai:www.lume.ufrgs.br:10183/166170Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2019-01-17T06:25:48Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
spellingShingle |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil Almeida, Tatiana Prestes de Genética animal Reprodução animal Age at first calving Dairy cattle Genetic parameters Reproductive efficiency |
title_short |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_full |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_fullStr |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_full_unstemmed |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_sort |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
author |
Almeida, Tatiana Prestes de |
author_facet |
Almeida, Tatiana Prestes de Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araújo |
author_role |
author |
author2 |
Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araújo |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Almeida, Tatiana Prestes de Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araújo |
dc.subject.por.fl_str_mv |
Genética animal Reprodução animal |
topic |
Genética animal Reprodução animal Age at first calving Dairy cattle Genetic parameters Reproductive efficiency |
dc.subject.eng.fl_str_mv |
Age at first calving Dairy cattle Genetic parameters Reproductive efficiency |
description |
This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from –0.23 (top line) to 0.28 (angularity) to age at first calving, from –0.54 (final score) to 0.34 (foot angle) to calving interval, from –0.23 (angularity) to 0.56 (stature) to dry period, and from –0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits. |
publishDate |
2017 |
dc.date.accessioned.fl_str_mv |
2017-09-05T02:32:53Z |
dc.date.issued.fl_str_mv |
2017 |
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info:eu-repo/semantics/article info:eu-repo/semantics/other |
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http://hdl.handle.net/10183/166170 |
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1516-3598 |
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001027044 |
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http://hdl.handle.net/10183/166170 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia= Brazilian journal of animal science. Viçosa, MG. Vol. 46, n. 2 (fev. 2017), p. 91-98 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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