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Breed effects for lactoferrin concentration determined by Fourier transform infrared spectroscopy
Lopez-Villalobos N, Davis SR, Beattie EM, Melis J, Berry S, Holroyd SE, Spelman RJ, Snell RG
Proceedings of the New Zealand Society of Animal Production, Volume 69, pp 60-64, Jun 2009
Proceedings of the New Zealand Society of Animal Production, Volume 69, pp 60-64, Jun 2009
Article class: Conference Presentation
Subject Terms: Animal production/wastage, Breed/breeding, Genetics, Milk, Nutrition/metabolism, Protein
Animal Type: Cattle
Publisher: New Zealand Society of Animal ProductionAbstract
A calibration equation based on partial least squares using Fourier transform infrared spectroscopy (FTIR) data was derived to predict concentration of lactoferrin (Lf) in bovine milk. The concordance correlation coefficient of the calibration equation was estimated at 0.81 using 246 milk samples collected in the 2003-04 season from second-parity crossbred cows during late lactation. The calibration equation was then used to predict the concentration of Lf (pLf) in 9,742 milk samples from 814 Holstein-Friesian (HF), 955 Jersey (J) and 842 crossbred HF x J cows sampled on average 3.7 times during the 2007-08 season. A repeatability animal model was used to obtain breed effects and estimates of variance components for pLf. Concentrations of pLF (mg/L milk) were significantly (P <0.001) different between breed groups (HF = 163 ± 3.8, HF x J = 175 ± 5.0 and J = 193 ± 6.3). Heritability and repeatability of pLf concentration were 0.16 ± 0.036 and 0.35 ± 0.012, respectively. These results confirm previous studies showing that Lf concentration in milk can be predicted using FTIR spectroscopy and that there are significant breed differences and animal variation that can be exploited in a breeding program.The whole of the literary matter of the Proceedings of the New Zealand Society of Animal Production is copyright New Zealand Society of Animal Production, Downloading this article signifies agreement with the terms and conditions of electronic access.
