TY  - JOUR
T1  - Estimation of Genetic and Environmental Parameters Affected Pre-Weaning Traits of Arabi Lambs
AU - Roshanfekr, H. AU - Mamouei, M. AU - Mohammadi, K. AU - Rahmatnejad, E. 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 12
SP  - 2590
EP  - 2593
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.2590.2593
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.2590.2593
KW  - Arabi lamb
KW  -
KW  -genetic parameters
KW  -environmental effects
KW  -growth traits
AB  - In this study, the data of Birth Weight (BW), Weaning Weight (WW) and Daily Gain from birth to weaning (DG) of Arabi lambs were used to estimate of environmental effects, heritability, phenotypic and genetic correlations among these traits. The effect of age of dam on BW was highly significant (p<0.01). The BW of lambs born to 2-year-old ewes in comparison to other lambs born to 3-6 year-old was significantly lighter. The male lambs as compared to the female ones had a heavier BW, WW and DG significantly (p<0.01). A  comparison  between  born  single  (4.12, 26.21 and 0.252 kg, respectively) and twin lambs (3.55, 23.88 and 0.201 kg, respectively) indicated that the BW, WW and DG of born single lambs were significantly higher (p<0.01). Lambing year had a highly significant effect on the pre-weaning traits (p<0.01). Heritability of BW, WW and DG were 0.121±0.073, 0.095±0.072 and 0.096±0.079, respectively. Phenotypic and genetic correlations between BW-WW, BW-DG and WW-DG were (0.229 and 0.489), (0.119 and 0.429) and (0.987 and 0.999), respectively.
ER  -