Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs
American Journal of Applied Scientific Research
Volume 2, Issue 1, January 2016, Pages: 1-5
Received: Dec. 13, 2015; Accepted: Dec. 17, 2015; Published: Jan. 5, 2016
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Firas R. Al-Samarai, Department of Veterinary, Public Health, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq
Fatten A. Mohammed, Department of Animal Resources, Directorate of Baghdad Agriculture, Ministry of Agriculture, Baghdad, Iraq
Falah H. Al-Zaydi, Department of Animal Resources, Directorate of Baghdad Agriculture, Ministry of Agriculture, Baghdad, Iraq
Nasr N. Al-Anbari, Department of Animal Resources, College of Agriculture, University of Baghdad, Baghdad, Iraq
Yehya K. Abdulrahman, Department of Veterinary, Public Health, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq
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This study was carried out on the research station of sheep and goat (Abo Gharib, west of Baghdad, Iraq) to evaluate the 120 Awassi rams for the birth weight (BW), weight at weaning (WW) and pre-weaning daily gains (DG) of their lambs after adjusting to the effects of parity, year of birth, sex, and type of birth (single, twin). Restricted Maximum Likelihood (REML) method in a mixed model (paternal half sib) was utilized to estimate the heritability (h²) for above mentioned traits. Proc mixed in SAS program was used to estimate Best Linear Unbiased Prediction (BLUP) values of rams for the three studied traits. The results revealed that the means of BW, WW and DG were 3.85, 26.64 and 0.181kg respectively. The studied traits were significantly (P < 0.01) affected by all fixed effects except the effect of ram on WW and DG which was significant (P < 0.05). Heritability estimates (h²) of BW, WW and DG were 0.23, 0.12 and 0.19 respectively. The lowest and highest BLUP values for the mentioned traits were -0.325, 0.255 kg, -1.142, 1.284 kg, and -0.103, 0.053 kg respectively. In conclusion: the results indicated that selection of rams for DG and BW could play an important role for improving the growth traits of Awassi sheep due to the high range among BLUP values along with the acceptable estimations of heritability.
Awassi Lamb, Birth Weight, Weaning Weight, Heritability
To cite this article
Firas R. Al-Samarai, Fatten A. Mohammed, Falah H. Al-Zaydi, Nasr N. Al-Anbari, Yehya K. Abdulrahman, Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs, American Journal of Applied Scientific Research. Vol. 2, No. 1, 2016, pp. 1-5. doi: 10.11648/j.ajasr.20160201.11
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