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Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil

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)vari...

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Main Authors: Almeida, Tatiana Prestes, Kern, Elisandra Lurdes, Daltro, Darlene dos Santos, Braccini Neto, José, Pimentel, Concepta Margaret McManus, Thaler Neto, André, Cobuci, Jaime Araujo
Format: Artigo
Language: English
Published: Sociedade Brasileira de Zootecnia 2018
Subjects:
Parto animal
Bovino de leite
Reprodução animal
Online Access: http://repositorio.unb.br/handle/10482/30821
http://dx.doi.org/10.1590/s1806-92902017000200002
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spelling ir-10482-308212020-07-02T12:45:34Z Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil Almeida, Tatiana Prestes Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araujo Parto animal Bovino de leite Reprodução animal 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. 2018-01-04T19:15:07Z 2018-01-04T19:15:07Z 2017-02 Artigo ALMEIDA, Tatiana Prestes et al. Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 2, p. 91-98, fev. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000200002. http://repositorio.unb.br/handle/10482/30821 http://dx.doi.org/10.1590/s1806-92902017000200002 en Acesso Aberto Revista Brasileira de Zootecnia - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso. Acesso em: 17 jan. 2018. application/pdf Sociedade Brasileira de Zootecnia
institution REPOSITORIO UNB
collection REPOSITORIO UNB
language English
topic Parto animal
Bovino de leite
Reprodução animal
spellingShingle Parto animal
Bovino de leite
Reprodução animal
Almeida, Tatiana Prestes
Kern, Elisandra Lurdes
Daltro, Darlene dos Santos
Braccini Neto, José
Pimentel, Concepta Margaret McManus
Thaler Neto, André
Cobuci, Jaime Araujo
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil
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.
format Artigo
author Almeida, Tatiana Prestes
Kern, Elisandra Lurdes
Daltro, Darlene dos Santos
Braccini Neto, José
Pimentel, Concepta Margaret McManus
Thaler Neto, André
Cobuci, Jaime Araujo
author_sort Almeida, Tatiana Prestes
title Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil
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
publisher Sociedade Brasileira de Zootecnia
publishDate 2018
url http://repositorio.unb.br/handle/10482/30821
http://dx.doi.org/10.1590/s1806-92902017000200002
_version_ 1672205672923529216
score 13.657419

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