Authors : Keshtkaran Alinaghi and Lavvaf Abolghasem
Abstract: The effect of crossbreeding between Afshary, Fashandi and Zandi rams with Zandi ewes on growth and carcass traits was studied using 45 and 30 lambs, respectively in feedlot condition. The individually feedlot was done for 100 days in the same management and as fed condition. The results show that the significant effect of crossbreeding on daily gain and dry mater intake that’s be highest for Afshari group and equal to 0.180±0.004 and 1.415±0.025, respectively whereas the difference for feed conversion ratio was not significant. The breed of lamb affected the final feedlot weight, empty body weight, hot carcass weight and carcass efficiency significantly that’s be highest for Afshari group and equal to 44.70±1.25, 38.85±1.05, 22.63±0.95 kg and 58.63±0.77%, respectively. The breed of ram did not significantly affected the percentage of loin, shoulder, brisket, fat tailed, tallow and total removable fat, however the percentage of thigh was significantly different between three groups. Also lean and fat percentage of sampling area were significantly highest for Fashandi and Zandi group, respectively and for bone percentage of sampling area, carcass length and longissmus muscle area the different were not significant.
Keshtkaran Alinaghi and Lavvaf Abolghasem, 2010. Performance Growth and Carcass Traits in Crossbreed Lambs from Afshari,Fashandi and Zandi Rams with Zandi Ewes in Feedlot Condition. Journal of Animal and Veterinary Advances, 9: 1406-1410.