SOME BLOOD PARAMETERS AS POSSIBLE SELECTION CRITERIA FOR MILK PERFORMANCE OF BOTH FRIESIAN COWS & BUFFALOES IN UPPER EGYPT

Milk yield of friesian cows showed a significant negative correlation coefficient with total blood lipids but a positive one with blood alpha-globulin, calcium and inorganic phosphorus. Buffaloes milk yield, on the other hand, showed a significant positive correlation with alpha-globulin but a negative one with gamma-globulin and inorganic phosphorus. Fat percentage in friesian milk was found to have a significant negative correlation with alpha-globulin but a significant positive one with inorganic phosphorus. Buffaloes milk butterfat percentage also showed a significant negative correla tion with blood alpha-globulin, albumin globulin ratio calcium and calcium phosphorus ratio, but a significant positive correlation with blood gamma-globulin. Milk fat yield of buffaloes cows had no significant correlation with any of the blood components. Frie sian milk fat yield, on the other hand, was found to have a signi ficant positive correlation with blood total lipids and calcium but a significant negative ones with serum total proteins and beta-glo bulin. The correlation coefficient between milk protein percentage of friesian cows and blood alpha-globulin was significantly negative but with gammaglobulin was significantly positive. Buffaloes milk protein showed a significant negative correlation with blood total lipids, alpha-globulin, albumin/globulin ratio and calcium/phosphorus ratio. Protein yields in buffaloes milk was not correlated with any of the blood components. Friesian milk protein yield, on the other hand, was a significantly negative incorrelation with blood total lipids and beta-globulin but significantly positive with serum calcium and inorganic phosphorus.