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Abstract
One hundred and seventeen apparently normal heavy pregnant Friesian
cows ranging in age from 2 to 11 years and their calves were used in the present
investigation. They are part of the dairy herds maintained in Gemeiza
Experimental Station, Gharbia province, Egypt. Animals in these herds are
raised according to the management and feeding regimes of the Institute of
Animal Production. The field part of the present work extended from January
2003 till June 2004.
Blood samples were collected aseptically from pregnant cows 10 days
before parturition and 10 days after parturition. Samples from calves were
collected before and 10 days after feeding colostrum.
Statistical analyses were executed on serum and colostrum metabolic
profiles. The variables studied were total protein, albumin, globulin, albumin to
globulin ratio (AGR), beta carotene, vitamin A, vitamin C, immunoglobulins
(IgG, IgA and IgM) and blood total leukocytic count. Moreover, genetic
analyses were performed to estimate the heritability as well as phenotypic and
genetic correlations among these measured variables.
I. Blood serum components:
a. In cows.
Age of the cow had significant influence on total protein, albumin.