Effect of crossbreeding on growth, feed efficiency, carcass characteristics and sensory traits of lambs from Lori-Bakhtiari and Romanov breeds

Influence of Crossbreeding of Ghezel Ram With Grey Shirazi Ewe on Growth Performance, Feed Efficiency and Carcass Traits of Fattening Lambs

“…However, weights of brisket and ank were not affected by crossbreeding. Similar to our result, other studies also reported lack of in uence of crossbreeding on these carcass characteristics (Ünal et al 2006;Abdullah et al 2010;Khaldari and Ghiasi 2018). In contrast, Kashan et al (2005) showed that crossbred lambs had higher weight of brisket and shoulder compared to the pure lambs.…”

“…In consist other studies had shown higher weight of hard drop in male lambs related to female lambs Weight of total soft drops not affected by crossbreeding except for heart and spleen weight which was greater in crossbred male lambs in comparing to purebred male lambs. Our results were like to the some other studies (Kashan et al 2005;Tsegay et al 2013;Khaldari and Ghiasi 2018). It has been reported in some research works that heart weight is affected by the lamb's genotype and in crossbred lambs is higher than in pure lambs (Kashan et al 2005;Abdullah et al 2010).…”

“…It appears that the preference of crossbred fattening lambs compared to purebred probably depends on the in uence of heterosis (hybrid vigor), breed complementarity and the puberty weight (Schiller et al 2015;Dvalishvili et al 2015; Khaldari and Ghiasi 2018). However, variations among studies point out that the ADG can be different as a result of herd history, managing, ration structure, protein and energy content of feed, animal age, time of fattening and type of crossing between diverse sire and dam (Abdullah et al 2010;Khaldari and Ghiasi 2018). Sex has important impact on body weight, that males have greater weight and gain compared to females.…”

“…The fat deposition in the body or tail compared to lean production requires more energy and therefore can be effective on FCR. In order to decrease the fat-tail, some studies have been conducted to reduce the size of the fat-tail by crossbreeding (Kashan et al 2005;Dvalishvili et al 2015;Khaldari and Ghiasi 2018). The extent of the fat-tail is affected by genetic and the feeding management of animals.…”

“…Additionally, genotype can be effective on carcass traits of sheep. Crossbreeding by decreasing the total body fat can improve carcass traits of fat tailed breeds (Khaldari and Ghiasi 2018). Results of another study displayed that crossing between Chaal (fat tailed) and Zel (tailed sheep) breeds increased quality of meat and reduced amount of muscular fat compared to pure breeds (Kashan et al 2005).…”