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Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits

Data for loin and backfat depth, as well as carcass growth of 126,051 three-way crossbred pigs raised between 2015 and 2019, were combined with climate records of air temperature, relative humidity, and temperature–humidity index. Environmental covariates with the largest impact on the studied trait...

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Autores principales: Usala, Maria, Macciotta, Nicolò Pietro Paolo, Bergamaschi, Matteo, Maltecca, Christian, Fix, Justin, Schwab, Clint, Shull, Caleb, Tiezzi, Francesco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7890262/
https://www.ncbi.nlm.nih.gov/pubmed/33613622
http://dx.doi.org/10.3389/fgene.2020.612815
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author Usala, Maria
Macciotta, Nicolò Pietro Paolo
Bergamaschi, Matteo
Maltecca, Christian
Fix, Justin
Schwab, Clint
Shull, Caleb
Tiezzi, Francesco
author_facet Usala, Maria
Macciotta, Nicolò Pietro Paolo
Bergamaschi, Matteo
Maltecca, Christian
Fix, Justin
Schwab, Clint
Shull, Caleb
Tiezzi, Francesco
author_sort Usala, Maria
collection PubMed
description Data for loin and backfat depth, as well as carcass growth of 126,051 three-way crossbred pigs raised between 2015 and 2019, were combined with climate records of air temperature, relative humidity, and temperature–humidity index. Environmental covariates with the largest impact on the studied traits were incorporated in a random regression model that also included genomic information. Genetic control of tolerance to heat stress and the presence of genotype by environment interaction were detected. Its magnitude was more substantial for loin depth and carcass growth, but all the traits studied showed a different impact of heat stress and different magnitude of genotype by environment interaction. For backfat depth, heritability was larger under comfortable conditions (no heat stress), as compared to heat stress conditions. Genetic correlations between extreme values of environmental conditions were lower (∼0.5 to negative) for growth and loin depth. Based on the solutions obtained from the model, sires were ranked on their breeding value for general performance and tolerance to heat stress. Antagonism between overall performance and tolerance to heat stress was moderate. Still, the models tested can provide valuable information to identify genetic material that is resilient and can perform equally when environmental conditions change. Overall, the results obtained from this study suggest the existence of genotype by environment interaction for carcass traits, as a possible genetic contributor to heat tolerance in swine.
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spelling pubmed-78902622021-02-19 Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits Usala, Maria Macciotta, Nicolò Pietro Paolo Bergamaschi, Matteo Maltecca, Christian Fix, Justin Schwab, Clint Shull, Caleb Tiezzi, Francesco Front Genet Genetics Data for loin and backfat depth, as well as carcass growth of 126,051 three-way crossbred pigs raised between 2015 and 2019, were combined with climate records of air temperature, relative humidity, and temperature–humidity index. Environmental covariates with the largest impact on the studied traits were incorporated in a random regression model that also included genomic information. Genetic control of tolerance to heat stress and the presence of genotype by environment interaction were detected. Its magnitude was more substantial for loin depth and carcass growth, but all the traits studied showed a different impact of heat stress and different magnitude of genotype by environment interaction. For backfat depth, heritability was larger under comfortable conditions (no heat stress), as compared to heat stress conditions. Genetic correlations between extreme values of environmental conditions were lower (∼0.5 to negative) for growth and loin depth. Based on the solutions obtained from the model, sires were ranked on their breeding value for general performance and tolerance to heat stress. Antagonism between overall performance and tolerance to heat stress was moderate. Still, the models tested can provide valuable information to identify genetic material that is resilient and can perform equally when environmental conditions change. Overall, the results obtained from this study suggest the existence of genotype by environment interaction for carcass traits, as a possible genetic contributor to heat tolerance in swine. Frontiers Media S.A. 2021-02-04 /pmc/articles/PMC7890262/ /pubmed/33613622 http://dx.doi.org/10.3389/fgene.2020.612815 Text en Copyright © 2021 Usala, Macciotta, Bergamaschi, Maltecca, Fix, Schwab, Shull and Tiezzi. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Genetics
Usala, Maria
Macciotta, Nicolò Pietro Paolo
Bergamaschi, Matteo
Maltecca, Christian
Fix, Justin
Schwab, Clint
Shull, Caleb
Tiezzi, Francesco
Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title_full Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title_fullStr Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title_full_unstemmed Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title_short Genetic Parameters for Tolerance to Heat Stress in Crossbred Swine Carcass Traits
title_sort genetic parameters for tolerance to heat stress in crossbred swine carcass traits
topic Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7890262/
https://www.ncbi.nlm.nih.gov/pubmed/33613622
http://dx.doi.org/10.3389/fgene.2020.612815
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