Genetic trends of body weight and some scanning traits of Karayaka lambs

DOI: 10.18805/ijar.B-698    | Article Id: B-698 | Page : 1119-1123
Citation :- Genetic trends of body weight and some scanning traits of Karayaka lambs.Indian Journal of Animal Research.2018.(52):1119-1123
Zafer Ulutaº, Yüksel Aksoy, Aziz ªahin, Emre ªirin, Ugur ªen and Mehmet Kuran ugur.sen@ahievran.edu.tr
Address : Omer Halisdemir University, Faculty of Ayhan Sahenk Agricultural Sciences and Technologies, Department of Animal Production and Technologies, 51240, Nigde, Turkey
Submitted Date : 25-01-2017
Accepted Date : 23-11-2017


This investigation was conducted to estimate the breeding values and genetic trends for body weight (BW), scanning fat depth (SFD) and scanning muscle depth (SMD) of Karayaka lambs (n= 1059) at 140 ± 3.36 day of age. Experiments were conducted in a nucleus flock of Karayaka sheep under a selective breeding program to increase productivity at research farm of Gaziosmanpasa University between the years 2006 - 2011. Breeding values were estimated with ASREML software. While genetic trend for BW and SMD showed a smooth ascending trend, SFD exhibited a descending trend throughout the experimental period. The genetic trend for BW, SFD and SMD of Karayaka lambs were observed as 0.433 kg / year, - 0.00686 mm / year and 0.00786 mm / year, respectively. The results showed that applying of a selection program on BW, SMD and SFD characteristics would increase BW and SMD values and decrease SFD value in Karayaka lambs. 


Breeding value Genetic trend Karayaka Lamb


  1. Aksoy, Y., Ulutas, Z., Sen, U., Sirin, E., Sahin, A. (2016). Estimates of genetic parameters for different body weights and muscle and fat depths of Karayaka lambs. Turkish Journal of Veterinary and Animal Sciences, 40: 13-20.
  2. Clarke, J.N., Nicoll, G.B., Mowat, C.M. (1998). Genetic parameters for live weight and live animal ultra-sound fat and eye muscle dimensions in a synthetic terminal sire breed. Proceedings of the New Zealand Society of Animal Production, 5: 140-142
  3. Gilmour, A.R., Cullis, B.R., Welham, S.J., Thompson, R. (1998). ASReml (ASREML) User Guide, Release 2.0. Orange, Australia: NBW Agriculture.
  4. Johnson, P.L., Blair, H.T., Davidson, L., Amer, P.R., McEwan, J.C. (2014). Genetic trends in the New Zealand Texel. Proceedings of the Association for the Advancement of Animal Breeding and Genetics, 14: 107–110
  5. Khan, K.M., Kumar, N., Chakraborty, D., Isfaq, F., Rajan, S., Bhatt, S.N., Kumar, D., Taggar, R.K. (2017). Phenotypic characterization of Purky sheep population of Kargil district. Indian Journal of Animal Research, 51 (4): 625–629.
  6. Khan, N.N., Kumar, N., Das, A.K., Chakraborty, D., Taggar, R.K., Gupta, P. (2015). Genetic studies on wool production traits in Rambouillet crossbred sheep in J & K State, India. Indian Journal of Animal Research, 49 (1): 40–43.
  7. Kvame, T., Vangen, O. (2007). Selection for lean weight based on ultrasound and CT in a meat line of sheep. Livestock Science, 106: 232–242.
  8. Larsgard, A.G., Kolstad, K. (2003). Selection for ultrasonic muscle depth; direct and correlated response in a Norwegian experimental sheep flock. Small Ruminant Research, 48: 23–29
  9. Malik, Z.S., Dalal, D.S., Patil, C.S., Dahiya, S.P. (2017). Genetic studies on growth, reproduction and wool production traits in Harnali sheep. Indian Journal of Animal Research, 51 (5): 813–816.
  10. Milerski, M. (2010). Ultrasound measurements of lamb loin muscle and back-fat depth in the Czech. Book of Abstracts of 59th Annual Meeting of EAAP, 16: 352. 
  11. Minitab for Windows (version 12.11) [Computer Program]. (1998). Available Distributor: Minitab Inc. 3081 Enterprise Drive State College, PA 16801-3008 USA. 
  12. Pedersen, J., Lauridsen, J. (2014). Estimation of breeding values in Danish sheep breeding. https://www.landbrugsinfo.dk/Faar-og-    geder/Avl-og-registrering/Sider/EBVsheep.pdf. (Access date: 05.01.2014).
  13. Sen, U., Sirin, E., Ulutas, Z., Kuran, M. (2011). Fattening performance, slaughter, carcass and meat quality traits of Karayaka lambs. Tropical Animal Health and Production, 43: 409–416. 
  14. Simm, G., Lewis, R.M., Grundy, B., Dingwall, W.S. (2002). Responses to selection for lean growth in sheep. Animal Science, 74: 39–50. 
  15. Swatland, H., Ananthanarayanan, S., Goldenberg, A. (1994). A review of probes and robots: implementing new technologies in meat evaluation. Journal of Animal Science, 72: 1475–1486. 
  16. Turk Stat (Turkish Statistical Institute). (2015). Livestock Statistics. http://www.turkstat.gov.tr. (accessed December 27, 2015).
  17. Ulutas, Z., Aksoy, Y., Sirin, E., Saatci, M. (2008). Introducing the Karayaka sheep breed with its traits and influencing factors. Pakistan Journal of Biological Sciences, 11: 1051–1054.
  18. Ulutas, Z., Sezer, M., Aksoy, Y., Sirin, E., Sen, U., Kuran, M., Akbas, Y. (2010). The effect of birth types on growth curve parameters of Karayaka lambs. Journal of Animal and Veterinary Advances, 9: 1384–1388.

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