Some Productive and Reproductive Traits of Kenana × Friesian Cattle in Sudan

The present study was conducted to investigate the performance of 50% Friesian ×50% Kenana crossbred dairy cattle. 194 records of F1 crossbred (progeny of Kenana ×Friesian) and 48 records of F1×F1 crossbred were analyzed. Traits studied were milk yield (Kg), calving interval (days), conception rate and gestation period (days). Obtained results showed that overall least square means of traits studied were 2444±164 kg, 514±0.53 days, 1.4±0.02 and 281±1.02 days respectively. Results showed that the mode of inducing the exotic blood (Kenana× Freisian or F1 ×F1), lactation number and age at first calving significantly (P?0.05) affected milk yield, F1 cows, and cows in late lactations and young cows at first calving being superior. On the other hand, Blood groups and lactation number adversely affected calving intervals (P?0.05). Also results showed that blood group differences, lactation number and age at first calving significantly (P?0.05) affected the number of services per calving. Finally, blood groups, lactation numbers and age at first calving had no significant (P?0.05) effects on gestation length. It is concluded that, performance of F1×F1 crossbred Kenana Cattle was lower than that of F1 Kenana cattle in studied traits.