Document Type : Articles
Authors
1 College of Veterinary Medicine, University of Tikrit, Tikrit, Iraq.
2 College of Agriculture, University of Tikrit, Tikrit, Iraq.
Abstract
This study was carried out at the ruminant research station of the General Commission for Agricultural Research / Ministry of Agriculture (in Abu Ghraib 20km west of Baghdad) from December 2018 to December/2020. The research included 200 records belonging to the Turkish and local Awassi sheep herd to estimate some genetic parameters (heritability, genetic and phenotypic correlations, and evaluate the Best Linear Unbiased Prediction (BLUP) for some productive traits (total milk production, lactation period, birth weight Weaning weight, average weight gain). The estimate of heritability were for the productive traits 0.19, 0.12, 0.25, 0.29, 0.25, respectively. The genetic correlation for the effective traits ranged between positive and highly significant (P<0.01) and not significant, as its coefficient ranged between 0.81 and 0.15. The phenotypic correlation of the productive traits ranged between positive and highly effective (P<0.01) and was not significant, as the coefficient ranged between 0.87 and 0.12 for the above effective characteristics. The values of the Best Linear Prediction (BLUP) for traits ranged 12.376. The lowest of which is -0.641.
Keywords
- Abdul Rahman, Faris Younis, Nader Youssef Abo, Ghassan Ibrahim Abdullah, Muthanna Fathi &Abdullah Al Jawari. (2013). The genetic factors affecting milk production and some of its components and the lactation period for Awassi ewes. University of Tikrit Journal of Agricultural Sciences, 13 (2): 69-61.
- El-Kasr, J. E., Da'ib, I. A., & Al-Jalili, Z. F. (1993). The basics of sheep and goat production and breeding.Al-Bial, A.M. and Singh, J. 2012. Factors affecting growth traits of Black Boni sheep in Yemen. Tamilnadu J. of Veterinary and Anim. Sci.s, 8(4) :194-198.
- Al-Bial, Abid Muhammad and Al-Doss, Ahmed Al-Ezz Ezzi, Sharaf & Saleh Abdullah. (2017). Estimation of genetic parameters of some productive traits in black Punic sheep. The Syrian Journal of Agricultural Research, 4(1) 37-32.
- Al-Dabbagh, Sameem Fakhri, Ahmed& Nabeel Najeeb.(2011). Study of some genetic and non-genetic factors affecting milk production and some of its physical characteristics in Awassi and Hamdaniya sheep. Mesopotamia Agriculture Journal, 39 (3): 94-101.
- Al-Dabbagh, Sameem Fakhri. (2019). Study of the relationship between milk production and some of its components with the growth of lambs in two breeds of Iraqi sheep. Iraqi Journal of Veterinary Sciences, 33 (2), 87.95.
- Al-jilawi. Jaafar Ramadan Ahmed. (2011). The relationship between body weights and dimensions at birth and weaning among local and Turkish Awassi sheep. Karbala University Journal, 9(2): 212-207.
- FA Al-Juwari, M. (2011). A study of some genetic and non-genetic factors affecting milk yield, compositions and growth of lambs in awassi and hamdani ewes. Mesopotamia Journal of Agriculture, 39(4), 159-166.
- Al-Khazraji, Wasan Jassim Muhammad & Al-Anbari Nasr Nouri.(2012).The role of cytoplasmic genetics in the performance of Turkish Awassi sheep. Al-Anbar Journal of Veterinary Sciences,5(1) :213-206.
- Al-Khuzai Allawi, Loaibi Dagher Abdullah. (2002). Estimation of genetic response to some productive traits in Awassi sheep. Ph.D. thesis - College of Agriculture - University of Baghdad - Iraq.
- Al-Najjar, Khalid Abdullah, Al-Aghbari, Abdul-Wali Muhammad, Al-Murstani,& Muhammad Rabie. (2011). Evaluation of some productive traits of Awassi ewes at some livestock research stations in Syria. The Syrian Journal of Dry Environments, 6 (2): 110-102.
- Al-Omar, Abdel Nasser,& Abdel Karim Khalid. (2009). Characterization of the health status of Awassi sheep in different regions of Syria. The Arab Journal of Dry Environments, 2(3): 105-95.
- Al-Tai, Bashar Fadel. (2018). Evaluated genetic parameters of some growth, productive and reproductive traits in Turkish Awassi sheep in Iraq. Master's Thesis - College of Agriculture – University of Tikrit - Iraq.
- Banos, G., Clark, E. L., Bush, S. J., Dutta, P., Bramis, G., Arsenos, G., ... & Psifidi, A. (2019). Genomic analyses underpin the feasibility of concomitant genetic improvement of milk yield and mastitis resistance in dairy sheep. bioRxiv, 577015.Bourdon, R.M. 1997. Understanding animal breeding–Prentice Hall. Inc. Upper Saddle River, New Jersey.
- Bromley, C. M., Van Vleck, L. D., & Snowder, G. D. (2001). Genetic correlations for litter weight weaned with growth, prolificacy, and wool traits in Columbia, Polypay, Rambouillet, and Targhee sheep. Journal of Animal Science, 79(2), 339-346.Central Statistical Organization. 2008. Annual Statistical Group - Ministry of Planning - Republic of Iraq.
- David, I., Astruc, J. M., Lagriffoul, G., Manfredi, E., Robert-Granie, C., & Bodin, L. (2008). Genetic correlation between female fertility and milk yield in Lacaune sheep. Journal of dairy science, 91(10), 4047-4052.Ehsaninia, J. 2021. Estimates of (co) variance components and genetic parameters for pre-weaning body weight traits and Kleiber ratio in Sangsari sheep breed. Italian J. of Anim. Sci., 20(1):918-927.
- Elia, J.V. (2018). Some factors affect milk production and its components and some growth traits of local Awassi sheep.J. of Res. in Ecol., 6 (2): 2169- 2175.
- Gutierrez, J. P., Legaz, E., & Goyache, F. (2007). Genetic parameters affecting 180-days standardised milk yield, test-day milk yield and lactation length in Spanish Assaf (Assaf. E) dairy sheep. Small Ruminant Research, 70(2-3), 233-238.Haenlein, G.F.W. 2007. About the evolution of goat and sheep milk production. Small rum. Res., 68(1-2):3-6.
- Hamann, H., Horstick, A., Wessels, A., & Distl, O. (2004). Estimation of genetic parameters for test day milk production, somatic cell score and litter size at birth in East Friesian ewes. Livestock Production Science, 87(2-3), 153-160.
- Hayes, J. F., & Hill, W. G. (1981). Modification of estimates of parameters in the construction of genetic selection indices ('bending'). Biometrics, 483-493.
- Muhammad, Qais Shaker.(2003). Effect of the mother's birth type and her offspring on some performance aspects of Awassi lambs. Master Thesis - College of Agriculture - University of Baghdad - Iraq.
- Nieto, C. R., Ferguson, M. B., Macleay, C. A., Briegel, J. R., Wood, D. A., Martin, G. B.,& Thompson, A. N. (2018). Milk production and composition, and progeny performance in young ewes with high merit for rapid growth and muscle and fat accumulation. animal, 12(11), 2292-2299.
- Pickering, N. K., Dodds, K. G., Blair, H. T., Hickson, R. E., Johnson, P. L., & McEwan, J. C. (2012). Genetic parameters for production traits in New Zealand dual-purpose sheep, with an emphasis on dagginess. Journal of animal science, 90(5), 1411-1420.
- Safari, E., Fogarty, N. M., & Gilmour, A. R. (2005). A review of genetic parameter estimates for wool, growth, meat and reproduction traits in sheep. Livestock production science, 92(3), 271-289.
- Sallam, A. M., Ibrahim, A. H., & Alsheikh, S. M. (2019). Estimation of genetic parameters and variance components of pre-weaning growth traits in Barki lambs. Small Ruminant Research, 173, 94-100.
- Schaeffer, L.R. (2001).Animal models. http// www. Aps. Uogu-elph.ca/~Irs/ Animalz/ 10-637-Iast updated: Jan. 4,2001. University of Guelph, Ontario.
- Selvaggi, M., D'Alessandro, A. G., & Dario, C. (2017). Environmental and genetic factors affecting milk yield and quality in three Italian sheep breeds. Journal of Dairy Research, 84(1), 27-31.
- Sultan, Khalid Hassani Sultan, &Mohammed Riyad Mohammed.(2019). The effect of eweight and milk production on the productive performance of newborns, milk production, and its components in Awassi sheep. Iraqi Journal of Veterinary Sciences, 33,(1): 16-9.
- Werf, J. (2000). Livestock straight-breeding system structures for the sustainable intensification of extensive grazing systems. ICAR Technical Series.
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