الفهرس 
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Abstract
Somatic cell count (SCC) in milk is of interest to dairy goat breeders because of its influence not only on milk production, but also on longevity and profitability. The aim of this study were therefore to consider the production traits and udder morphometry relationships between them and somatic cell count. For this purpose, production traits and twelve udder and teat traits were measured from 152 clinically healthy dairy Zaraibi goats at the first four parities of lactations. Milk samples were taken for analysis at 90 days of lactation after weaning of the kids. The examined goats were classified to three categories according to SCC in milk; (≤470x103 cells/ml), (from 471 to ≤ 500x103 cells/ml) and (>500x103 cells/ml). Results showed that the goats with SCC ≤470x103 cells/ml had significantly the highest values of all studied production parameters (Milk yield at 90 d of lactation, average daily milk yield, total milk yield, total days in milk, does weight at 90 d of kidding, and litter size). Significant negative correlations have been determined between all production traits and SCC. The udder depth, width and circumference showed to be different depending on SCC in milk, with highly significant negative correlations. The same trend of significant differences was observed for teats internal and external distance, teat diameter, and length with SCC. The teat position and udder attachment scores were high in goats at SCC ≤470x103 cells/ml, in the same time such scores decreased negatively when SCC values increased. However, the regression equations for predicting SCC showed that the maximum r2 value (62.8%) obtained was by using average daily milk yield, udder depth, days in milk and udder width traits. It could be concluded that including udder depth and width with teats separation and diameter traits in future breeding programs of Zaraibi goats would be useful to ensure that the selection for increased productivity is not accompanied by unwanted deterioration. In addition, these relations could be used as indirect diagnosis of SCC in milk of Zaraibi goats.