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Enzyme activity and metabolite concentrations in the blood serum of dairy cows as indicators of performance. 3. Factor analysis of serum levels and the correlation between these factors and milk production



Enzyme activity and metabolite concentrations in the blood serum of dairy cows as indicators of performance. 3. Factor analysis of serum levels and the correlation between these factors and milk production



Zeitschrift fur Tierzuchtung und Zuchtungsbiologie 95(3/4): 240-245



Over a 4-yr period, 3617 blood samples were obtained from 203 Holstein-Friesian cows, and the same enzymes and metabolites were studied as in Pt. 2. A factor analysis was carried out, 4 factors being isolated. Three of these factors were interpreted as being associated with the liver, the muscles and liver metabolism. The 4th factor could not be interpreted with certainty, but was thought to be associated with either the liver or kidneys.

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Enzyme activities and concentration of metabolites in blood serum as indicators of performance in dairy cows. III. Factor analysis of serum levels and the relationship between the factors and milk yield. Zeitschrift fur Tierzuchtung und Zuchtungsbiologie Journal of animal breeding and genetics79 95(3-4): 240-245, 1978

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