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Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs

Received: 13 December 2015    Accepted: 17 December 2015    Published: 5 January 2016
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Abstract

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.

Published in American Journal of Applied Scientific Research (Volume 2, Issue 1)
DOI 10.11648/j.ajasr.20160201.11
Page(s) 1-5
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Awassi Lamb, Birth Weight, Weaning Weight, Heritability

References
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Cite This Article
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    Firas R. Al-Samarai, Fatten A. Mohammed, Falah H. Al-Zaydi, Nasr N. Al-Anbari, Yehya K. Abdulrahman. (2016). Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs. American Journal of Applied Scientific Research, 2(1), 1-5. https://doi.org/10.11648/j.ajasr.20160201.11

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    ACS Style

    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. Am. J. Appl. Sci. Res. 2016, 2(1), 1-5. doi: 10.11648/j.ajasr.20160201.11

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    AMA Style

    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. Am J Appl Sci Res. 2016;2(1):1-5. doi: 10.11648/j.ajasr.20160201.11

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  • @article{10.11648/j.ajasr.20160201.11,
      author = {Firas R. Al-Samarai and Fatten A. Mohammed and Falah H. Al-Zaydi and Nasr N. Al-Anbari and Yehya K. Abdulrahman},
      title = {Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs},
      journal = {American Journal of Applied Scientific Research},
      volume = {2},
      number = {1},
      pages = {1-5},
      doi = {10.11648/j.ajasr.20160201.11},
      url = {https://doi.org/10.11648/j.ajasr.20160201.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajasr.20160201.11},
      abstract = {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 ²) 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.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - Genetic Evaluation of Iraqi Awassi Rams According to Some Growth Traits of Their Progeny Lambs
    AU  - Firas R. Al-Samarai
    AU  - Fatten A. Mohammed
    AU  - Falah H. Al-Zaydi
    AU  - Nasr N. Al-Anbari
    AU  - Yehya K. Abdulrahman
    Y1  - 2016/01/05
    PY  - 2016
    N1  - https://doi.org/10.11648/j.ajasr.20160201.11
    DO  - 10.11648/j.ajasr.20160201.11
    T2  - American Journal of Applied Scientific Research
    JF  - American Journal of Applied Scientific Research
    JO  - American Journal of Applied Scientific Research
    SP  - 1
    EP  - 5
    PB  - Science Publishing Group
    SN  - 2471-9730
    UR  - https://doi.org/10.11648/j.ajasr.20160201.11
    AB  - 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 ²) 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.
    VL  - 2
    IS  - 1
    ER  - 

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Author Information
  • Department of Veterinary, Public Health, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq

  • Department of Animal Resources, Directorate of Baghdad Agriculture, Ministry of Agriculture, Baghdad, Iraq

  • Department of Animal Resources, Directorate of Baghdad Agriculture, Ministry of Agriculture, Baghdad, Iraq

  • Department of Animal Resources, College of Agriculture, University of Baghdad, Baghdad, Iraq

  • Department of Veterinary, Public Health, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq

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