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Different selection practices affect the environmental sensitivity of beef cattle

The objective of the present study was to evaluate the effects of different selection practices on the environmental sensitivity of reproductive and growth traits in males and females of three Nellore selection lines [control (NeC), selection (NeS), and traditional (NeT) lines]. Moreover, genetic tr...

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Autores principales: de Paula Freitas, Anielly, Santana Júnior, Mário Luiz, Schenkel, Flavio Schramm, Mercadante, Maria Eugênia Zerlotti, Cyrillo, Joslaine Noely dos Santos Goncalves, de Paz, Claudia Cristina Paro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8018670/
https://www.ncbi.nlm.nih.gov/pubmed/33798231
http://dx.doi.org/10.1371/journal.pone.0248186
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author de Paula Freitas, Anielly
Santana Júnior, Mário Luiz
Schenkel, Flavio Schramm
Mercadante, Maria Eugênia Zerlotti
Cyrillo, Joslaine Noely dos Santos Goncalves
de Paz, Claudia Cristina Paro
author_facet de Paula Freitas, Anielly
Santana Júnior, Mário Luiz
Schenkel, Flavio Schramm
Mercadante, Maria Eugênia Zerlotti
Cyrillo, Joslaine Noely dos Santos Goncalves
de Paz, Claudia Cristina Paro
author_sort de Paula Freitas, Anielly
collection PubMed
description The objective of the present study was to evaluate the effects of different selection practices on the environmental sensitivity of reproductive and growth traits in males and females of three Nellore selection lines [control (NeC), selection (NeS), and traditional (NeT) lines]. Moreover, genetic trends for the intercept and slope were estimated for each line, and the possible reranking of sires was examined. A total of 8,757 records of selection weight (SW), 3,331 records of scrotal circumference (SC), and 2,311 records of days to first calving (DFC) from Nellore cattle born between 1981 and 2017 were analyzed. (Co)variance components and genetic parameters of all traits were estimated using a reaction norm model with Gibbs sampler. In all cattle lines, the mean heritability of the studied traits ranged from 0.39 to 0.75 for SW in both males and females, from 0.46 to 0.68 for SC, and from 0.06 to 0.57 for DFC along with the environmental descriptor. In all cattle lines, the genetic correlation coefficients between the intercept and slope ranged from 0.03 to 0.81 for SW, from -0.14 to 0.39 for SC, and from -0.87 to -0.42 for DFC. Genetic trends for the slope and proportion of plastic genotypes indicated that the NeS line was more responsive to environmental changes, whereas the NeC and NeT lines tended to respond more modestly. Reranking of sires was observed for all traits, specifically in the NeC and NeT lines, because of the weak correlation between the opposite extreme environments. In the NeS line, reranking of sires was observed for DFC alone. Our results indicate that the effects of genotype-environment interaction are important and should be considered in genetic evaluations of Nellore cattle. Moreover, different selection practices affected the environmental sensitivity of the Nellore selection lines tested in this study.
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spelling pubmed-80186702021-04-13 Different selection practices affect the environmental sensitivity of beef cattle de Paula Freitas, Anielly Santana Júnior, Mário Luiz Schenkel, Flavio Schramm Mercadante, Maria Eugênia Zerlotti Cyrillo, Joslaine Noely dos Santos Goncalves de Paz, Claudia Cristina Paro PLoS One Research Article The objective of the present study was to evaluate the effects of different selection practices on the environmental sensitivity of reproductive and growth traits in males and females of three Nellore selection lines [control (NeC), selection (NeS), and traditional (NeT) lines]. Moreover, genetic trends for the intercept and slope were estimated for each line, and the possible reranking of sires was examined. A total of 8,757 records of selection weight (SW), 3,331 records of scrotal circumference (SC), and 2,311 records of days to first calving (DFC) from Nellore cattle born between 1981 and 2017 were analyzed. (Co)variance components and genetic parameters of all traits were estimated using a reaction norm model with Gibbs sampler. In all cattle lines, the mean heritability of the studied traits ranged from 0.39 to 0.75 for SW in both males and females, from 0.46 to 0.68 for SC, and from 0.06 to 0.57 for DFC along with the environmental descriptor. In all cattle lines, the genetic correlation coefficients between the intercept and slope ranged from 0.03 to 0.81 for SW, from -0.14 to 0.39 for SC, and from -0.87 to -0.42 for DFC. Genetic trends for the slope and proportion of plastic genotypes indicated that the NeS line was more responsive to environmental changes, whereas the NeC and NeT lines tended to respond more modestly. Reranking of sires was observed for all traits, specifically in the NeC and NeT lines, because of the weak correlation between the opposite extreme environments. In the NeS line, reranking of sires was observed for DFC alone. Our results indicate that the effects of genotype-environment interaction are important and should be considered in genetic evaluations of Nellore cattle. Moreover, different selection practices affected the environmental sensitivity of the Nellore selection lines tested in this study. Public Library of Science 2021-04-02 /pmc/articles/PMC8018670/ /pubmed/33798231 http://dx.doi.org/10.1371/journal.pone.0248186 Text en © 2021 de Paula Freitas et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
de Paula Freitas, Anielly
Santana Júnior, Mário Luiz
Schenkel, Flavio Schramm
Mercadante, Maria Eugênia Zerlotti
Cyrillo, Joslaine Noely dos Santos Goncalves
de Paz, Claudia Cristina Paro
Different selection practices affect the environmental sensitivity of beef cattle
title Different selection practices affect the environmental sensitivity of beef cattle
title_full Different selection practices affect the environmental sensitivity of beef cattle
title_fullStr Different selection practices affect the environmental sensitivity of beef cattle
title_full_unstemmed Different selection practices affect the environmental sensitivity of beef cattle
title_short Different selection practices affect the environmental sensitivity of beef cattle
title_sort different selection practices affect the environmental sensitivity of beef cattle
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8018670/
https://www.ncbi.nlm.nih.gov/pubmed/33798231
http://dx.doi.org/10.1371/journal.pone.0248186
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