Genetic Evaluation of Growth Trait via Random Regression Models in Makouei sheep

A number of 8733 body weight records from 110 sires and 550 dams, collected between 1990 to 2014 from the rearing and breeding station of Makouei sheep. Random regressions of direct additive genetic, maternal and direct permanent environmental were random parts of the models. The variances increased along the trajectory from 0.25 to 2.03, 0.11 to 14.85 and 0.08 to 2.26 for direct additive genetic, direct and maternal permanent environmental effect, respectively. Low to high estimates of direct heritability (0.10-0.42) and moderate to high estimates of coefficient of permanent environmental effects (0.18 to 0.77) were obtained, while estimates of maternal environmental effect (c2) (0.06 to 0.21) was low and moderate in all ages.

Keywords:

Makooei Sheep , Body Weight , Random Regression Model , Variance Components