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Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle

BACKGROUND: Genotype by environment interactions are currently ignored in national genetic evaluations of dairy cattle. However, this is often questioned, especially when environment or herd management is wide-ranging. The aim of this study was to assess genotype by environment interactions for prod...

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Autores principales: Huquet, Bérénice, Leclerc, Hélène, Ducrocq, Vincent
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548741/
https://www.ncbi.nlm.nih.gov/pubmed/23181486
http://dx.doi.org/10.1186/1297-9686-44-35
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author Huquet, Bérénice
Leclerc, Hélène
Ducrocq, Vincent
author_facet Huquet, Bérénice
Leclerc, Hélène
Ducrocq, Vincent
author_sort Huquet, Bérénice
collection PubMed
description BACKGROUND: Genotype by environment interactions are currently ignored in national genetic evaluations of dairy cattle. However, this is often questioned, especially when environment or herd management is wide-ranging. The aim of this study was to assess genotype by environment interactions for production traits (milk, protein, fat yields and fat and protein contents) in French dairy cattle using an original approach to characterize the environments. METHODS: Genetic parameters of production traits were estimated for three breeds (Holstein, Normande and Montbéliarde) using multiple-trait and reaction norm models. Variables derived from Herd Test Day profiles obtained after a test day model evaluation were used to define herd environment. RESULTS: Multiple-trait and reaction norm models gave similar results. Genetic correlations were very close to unity for all traits, except between some extreme environments. However, a relatively wide range of heritabilities by trait and breed was found across environments. This was more the case for milk, protein and fat yields than for protein and fat contents. CONCLUSIONS: No real reranking of animals was observed across environments. However, a significant scale effect exists: the more intensive the herd management for milk yield, the larger the heritability.
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spelling pubmed-35487412013-02-04 Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle Huquet, Bérénice Leclerc, Hélène Ducrocq, Vincent Genet Sel Evol Research BACKGROUND: Genotype by environment interactions are currently ignored in national genetic evaluations of dairy cattle. However, this is often questioned, especially when environment or herd management is wide-ranging. The aim of this study was to assess genotype by environment interactions for production traits (milk, protein, fat yields and fat and protein contents) in French dairy cattle using an original approach to characterize the environments. METHODS: Genetic parameters of production traits were estimated for three breeds (Holstein, Normande and Montbéliarde) using multiple-trait and reaction norm models. Variables derived from Herd Test Day profiles obtained after a test day model evaluation were used to define herd environment. RESULTS: Multiple-trait and reaction norm models gave similar results. Genetic correlations were very close to unity for all traits, except between some extreme environments. However, a relatively wide range of heritabilities by trait and breed was found across environments. This was more the case for milk, protein and fat yields than for protein and fat contents. CONCLUSIONS: No real reranking of animals was observed across environments. However, a significant scale effect exists: the more intensive the herd management for milk yield, the larger the heritability. BioMed Central 2012-11-26 /pmc/articles/PMC3548741/ /pubmed/23181486 http://dx.doi.org/10.1186/1297-9686-44-35 Text en Copyright ©2012 Huquet et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Huquet, Bérénice
Leclerc, Hélène
Ducrocq, Vincent
Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title_full Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title_fullStr Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title_full_unstemmed Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title_short Modelling and estimation of genotype by environment interactions for production traits in French dairy cattle
title_sort modelling and estimation of genotype by environment interactions for production traits in french dairy cattle
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548741/
https://www.ncbi.nlm.nih.gov/pubmed/23181486
http://dx.doi.org/10.1186/1297-9686-44-35
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