This experiment was conducted to identify the pure samples of Sanjabi sheep population, evaluation and monitor the current status of this population. For this purpose, 17 herds of Sanjabi sheep were identified in Kermanshah province and among them 13 pure herds along with herd of Mehregan research station were selected and their production and reproductive characteristics were recorded and monitored in a one-year period. The results showed, 28.4% of sheep had Zardi ecotype, 37.3% had Kagal ecotype, 31.2% had Kolool ecotype and 3.2% had abnormal ecotype. The average birth weight of male and female single lambs 4.34±0.62 and 4.09±0.49 kg, and twins lambs 3.84±0.52 and 3.61±0.46 kg were estimated, respectively. The trimester weight mean of male and female single lambs 24.43±5.32 and 23.78±49.49 kg and twins lambs 17.67±5.09 and 16.93±4.37 Kg were obtained, respectively. Biometric studies showed thatmean of body weight (kg), size of chest girth (cm), body mass (m3), pelvis width (cm) and wither height at the age of 12 to 14 months in rams (67.78±13.17, and 108.78±8.93, 1.00±0.22, 34.48±3.11, 83.78±7.04, respectively) were higher than ewes (61.09±81.41 and 98.99±4.71, 0.82±011, 32.80±2.14, respectively, P<0.001). Mean of first mating age (month), first lambing age, mating-lambing distance (day), distance between two lambing (month), number of ewe lamb production per year, fertility and prolificacy percentage 16.00±0.60, 21.80±1.35, 155.23±8.52, 8.50±1.60, 1.50± 1.50, 80.00±68.35 and 18.00±0.60, were calculated, respectively.According to the results, this breed has an acceptable production and reproductive performance and due to its high volume of body mass, has a good fattening capacity. |