برآورد پارامترهاي ژنتيكي اوزان بدن در گوسفند بلوچي : مولفه هاي واريانس و پارامترهاي تجزيه يك صنعتي

Estimation of genetic parameter in Baluchi sheep for body weight: 1. Variance components and parameters of univariate analysis

Variance components, direct and maternal heritability and c2 in Baluchi sheep were estimated by restricted maximum likelihood procedure using 25 years data collected in Abbas abad station (Korasan Province). Six different animal model were fitted. These models were different for the number of random effects. The results of six models were compared. Estimates of direct heritability for birth, 3,6,9 and 12 moths weights obtained by model eight were 0.19+ 0.019 , 0, ] 3±0.031, 0.16+ 0.028, 0.12+ 0.42 and 0.26+ 0.044 respectively. The maternal heritability and c2 were estimated to be (0.08+ 0.017) and (0.12+ 0.012), (0.04 +0.021 and 0.07+ 0.081), (0.03 +0,019 and 0.02+ 0.017), (0.03± 0.025 and 0.03 +0.024) and (0.01+ 0.0] 2 and 0.01+ 0.013), respectively.