Article (Scientific journals)
Can we observe expected behaviors at large and individual scales for feed efficiency-related traits predicted partly from milk mid-infrared spectra?
Zhang, Lei; Gengler, Nicolas; Dehareng, Frédéric et al.
2020In Animals, 10, p. 873
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Keywords :
mid-infrared; feed efficiency; dairy cow; moyen infrarouge; efficience alimentaire; vache laitière
Abstract :
[en] Phenotypes related to feed efficiency were predicted from records easily acquired by breeding organizations. A total of 461,036 and 354,148 records were collected from the first and second parity Holstein cows. Equations were applied to the milk mid-infrared spectra to predict the main milk components and coupled with animal characteristics to predict the body weight (pBW). Dry matter intake (pDMI) was predicted from pBW using the National Research Council (NRC) equation. The consumption index (pIC) was estimated from pDMI and fat, and protein corrected milk. All traits were modeled using single trait test-day models. Descriptive statistics were within the expected range. Milk yield, pDMI, and pBW were phenotypically positively related (r ranged from 0.08 to 0.64). As expected, pIC was phenotypically negatively correlated with milk yield (−0.77 and −0.80 for the first and second lactation) and slightly positively correlated with pBW (0.16 and 0.07 for the first and second lactation). Later, parity cows seemed to have a better feed efficiency as they had a lower pIC. Although the prediction accuracy was moderate, the observed behaviors of studied traits by year, stage of lactation, and parity were in agreement with the literature. Moreover, as a genetic component was highlighted (heritability around 0.18), it would be interesting to realize a genetic evaluation of these traits and compare the obtained breeding values with the ones estimated for sires having daughters with reference feed efficiency records. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Disciplines :
Animal production & animal husbandry
Food science
Author, co-author :
Zhang, Lei ;  Université de Liège - ULiège > Terra
Gengler, Nicolas  ;  Université de Liège - ULiège > Département GxABT > Ingénierie des productions animales et nutrition
Dehareng, Frédéric;  CRA-W
Colinet, Frédéric ;  ULiège
Froidmont, Eric;  CRA-W
Soyeurt, Hélène  ;  Université de Liège - ULiège > Département GxABT > Modélisation et développement
Language :
English
Title :
Can we observe expected behaviors at large and individual scales for feed efficiency-related traits predicted partly from milk mid-infrared spectra?
Alternative titles :
[fr] Observe-t-on les comportements attendus individuellement et à large échelle pour des caractères reliés à l'efficience alimentaire prédits partiellement en utilisant la spectrométrie du moyen infrarouge du lait
Publication date :
May 2020
Journal title :
Animals
eISSN :
2076-2615
Publisher :
MDPI AG, Switzerland
Volume :
10
Pages :
873
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 December 2020

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