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Variation of lactoferrin (LTF) content predicted by mid-infrared spectrometry (MIR)
Soyeurt, Hélène; Colinet, Frédéric; Arnould, Valérie et al.
2007In Book of Abstracts of the 58th Annual Meeting of the European Association for Animal Production
Peer reviewed
 

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Keywords :
lactoferrin; milk; genetic
Abstract :
[en] Methods to measure LTF do not permit the use of this data in genetic. The aim of this study was to create an equation to predict LTF (pLTF) in milk by MIR. Calibration with Partial Least Squares on 69 samples showed a cross-validation coefficient of determination equal to 75.01%. So, pLTF for 7,690 samples collected from April 2005 to April 2006 were predicted. Milk yields, %fat, %protein and somatic cells count (SCS) were added. 39,441 records on 1,910 cows were analyzed by a multi- trait mixed model including as effects: herd*test date*lactation number, lactation stage*lactation number, age*lactation number, regression on breed fractions, permanent environments within and across lactations and animal effect. Variances and standard errors were estimated by AI-REML. Number and stage of lactation influence pLTF. A difference across 7 breeds was observed. Heritability for pLTF was 19.70%. So, the genetic variability for LIF exists. The phenotypic correlation observed between SCS and pLTF was equal to 0.26. As SCS increases in presence of mastitis, this observation seems to indicate that pLTF could be an indicator of mastitis.
Disciplines :
Genetics & genetic processes
Food science
Animal production & animal husbandry
Author, co-author :
Soyeurt, Hélène  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Colinet, Frédéric ;  Faculté Universitaire des Sciences Agronomiques de Gembloux - FUSAGx > Biologie animale et microbienne
Arnould, Valérie ;  Faculté Universitaire des Sciences Agronomiques de Gembloux - FUSAGx > Biologie animale et microbienne
Dardenne, Pierre;  Centre Wallon de Recherches agronomiques > Qualité des productions animales
Misztal, Ignacy;  University of Georgia > Animal and Dairy Science
Gengler, Nicolas  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Language :
English
Title :
Variation of lactoferrin (LTF) content predicted by mid-infrared spectrometry (MIR)
Publication date :
August 2007
Event name :
58th Annual Meeting of the European Association for Animal Production
Event organizer :
EAAP - European Federation of Animal Science
Event place :
Dublin, Ireland
Event date :
26-29 August 2007
Audience :
International
Main work title :
Book of Abstracts of the 58th Annual Meeting of the European Association for Animal Production
Publisher :
Wageningen Academic Publishers, Wageningen, Netherlands
Edition :
Dublin 2007
ISBN/EAN :
978-90-8686-045-6
Collection name :
Nº. 13
Pages :
81
Peer reviewed :
Peer reviewed
Available on ORBi :
since 04 October 2009

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