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Estimation of Myostatin gene effects on production traits and fatty acid contents in bovine milk
Vanrobays, Marie-Laure; Bastin, Catherine; Colinet, Frédéric et al.
2012In Book of Abstracts of the 63rd Annual Meeting of the European Federation of Animal Science
Peer reviewed
 

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Keywords :
Estimated gene content; Milk performance traits; Myostatin gene; Milk fatty acids
Abstract :
[en] The aim of this study was to estimate the genetic parameters of milk, fat, and protein yields, saturated (SFA) and monounsaturated fatty acid (MUFA) contents in bovine milk and to estimate the Myostatin (mh) gene effect on these traits. For this purpose, 51,614 test-day records (24,124, 16,145, and 11,345 for first, second and third lactation, respectively) of 3,098 dual purpose Belgian Blue cows in 38 herds from the Walloon Region of Belgium were used. Because only 2,301 animals, including 1,082 cows with test-day records, were genotyped for mh, the gene content of non-genotyped animals was predicted from animals with a known genotype using the relationships with these animals. Variance components were estimated using Restricted Maximum Likelihood. A 3-lactations, 5-traits random regression test-day mixed model, based on the official Walloon genetic evaluation model for production traits, was used with an additional fixed regression on mh gene content to estimate allele substitution effects. Daily heritability estimates (average of 3 lactations) were 0.34 for SFA and 0.16 for MUFA and were higher than those for production traits (0.11, 0.10, and 0.09 for milk, fat, and protein yields, respectively). Allele substitution effects approximate standard-errors) for mh through the three lactations were-0.628 (+0.343),-0.024 (0.014) and -0.021 (+0.009) kg per day for milk, fat, and protein yields, respectively. Concerning SFA and MUFA contents in milk, the average allele substitution effects were -0.001 (+0.027) and 0.029 (+0.023) g/dl of milk. To conclude, results from this study showed that milk performance traits and milk fatty acid profile are influenced by mh genotypes.
Disciplines :
Genetics & genetic processes
Animal production & animal husbandry
Food science
Author, co-author :
Vanrobays, Marie-Laure ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Bastin, Catherine ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Colinet, Frédéric ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Vandenplas, Jérémie ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Troch, Thibault ;  Université de Liège - ULiège > Chimie et bio-industries > Laboratoire Qualité et sécurité des produits agro-aliment.
Soyeurt, Hélène  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Gengler, Nicolas  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Language :
English
Title :
Estimation of Myostatin gene effects on production traits and fatty acid contents in bovine milk
Publication date :
August 2012
Event name :
63rd Annual Meeting of the European Association for Animal Production
Event organizer :
EAAP - European Federation of Animal Science
Event place :
Bratislava, Slovakia
Event date :
27-31 August 2012
Audience :
International
Main work title :
Book of Abstracts of the 63rd Annual Meeting of the European Federation of Animal Science
Publisher :
Wageningen Academic Publishers, Wageningen, Netherlands
Edition :
Bratislava 2012
ISBN/EAN :
978-90-8686-761-5
Collection name :
Nº. 18
Pages :
78
Peer reviewed :
Peer reviewed
European Projects :
FP7 - 211708 - ROBUSTMILK - Innovative and Practical Breeding Tools for Improved Dairy Products from More Robust Dairy Cattle
Funders :
CE - Commission Européenne [BE]
Available on ORBi :
since 04 September 2012

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