Body weights at birth (BWT), 1(WT1M), 2(WT2M), 3(WT3M), 4(WT4M), 5(WT5M) and 6(WT6M) months of age for 110 Shami kids born at Shami Breeding Station/ Qushtapa during Sep. 2011- Mar. 2012 were utilized. Overall means of BWT, WT1M, WT2M, WT3M, WT4M, WT5M and WT6M were 4.05, 8.38, 13.28, 16.72, 19.77, 23.61 and 26.34 kg, respectively. Results revealed that age of doe had a significant effect on BWT, WT2M, and WT6M. Season of kidding affects BWT and WT4M significantly (P<0.01). The effects of sex of lamb and weight of doe at kidding on all studied traits were not significant. Effect of type of birth was significant (P<0.01) on BWT only. Regressions of WT1M, WT2M, WT3M, WT4M, WT5M and WT6M on BWT, WT1M, WT2M, WT3M, WT4M and WT5M were all significant (P<0.01) and being 1.219, 0.854, 0.988, 1.034, 1.164 and 0.994 kg/kg, respectively. Repeatability estimates for BWT, WT1M, WT2M, WT3M, WT4M, WT5M and WT6M were 0.61, 0.55, 0.54, 0.53, 0.47, 0.42 and 0.44, respectively. The corresponding estimates of heritability were 0.49, 0.44, 0.43, 0.38, 0.28, 0.25 and 0.25, respectively. Genetic correlations between studied traits were positive and ranged between 0.36 (BWT with WT6M) and 0.76 (WT4M with WT5M). Most of the phenotypic correlations between body weights were higher than genetic correlation and ranged between 0.48 and 0.90. It was concluded that estimated genetic parameters for the studied traits were relatively high; therefore, there is a possibility to improve the traits by selection.
