دانشگاه تبریز پژوهش های علوم دامی (دانش کشاورزی) 2008-5125 32 3 2022 11 22 Does the 9-11th rib composition correspond with body composition in fat-tailed Afshari lambs? آیا ترکیبات دنده 9-11 باترکیبات بدن دربره‌های دنبه‌دار افشاری مطابقت دارد؟ 123 129 16036 10.22034/as.2022.42388.1592 FA حسین شادمان گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران احسان محجوبی گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران داود زحمتکش دانشگاه زنجان گروه علوم دامی مهدی حسین یزدی دانشگاه اراک، دانشکده کشاورزی و منابع طبیعی، گروه علوم دامی Journal Article 2020 11 16 To predict body composition of growing Afshari fat-tailed lambs using the 9-11th rib composition as a predictor of whole body composition, 10 lambs were randomly selected (43.9 ± 3.9; mean shrunk body weight; mean ± SD) and harvested accordingly. After slaughter, the 9-11th rib sections were harvested from chilled carcasses for 24 h; fat, lean, fat-tail and bone were weighted separately and total separable fat (without fat-tail) and lean were grounded twice to obtain a homogenous sample for further chemical analysis. Rib dissection separable lean, fat and bone percent were (mean ± SD) 33.9 ± 6.6, 23.6 ± 6.6, and 17.3 ± 7.4, respectively. In addition, rib dissection ether extract, crude protein, moisture, and ash percent were (mean ± SD) 27.6 ± 4.1, 19.3 ± 0.7, 49.6 ± 5.3, and 1.7 ± 0.3, respectively. Except for carcass separable bone percent (with and without fat-tail), it was shown that the 9-11th physical rib composition can properly predict the carcass separable fat (adjusted R2 of 0.62 and 0.86 with and without accounting for fat-tail, respectively; P < 0.01) and lean (adjusted R2 0.77 and 0.71 with and without accounting for fat-tail, respectively; P < 0.01). As for the carcass chemical composition, with or without accounting for fat-tail, none of rib chemical commotion based on as-is analysis predicted chemical carcass composition. However, when as-is data were represented as soft tissue dry matter, only rib crude protein (%, without accounting for fat-tail) could predict carcass crude protein (adjusted R2 = 0.60; P < 0.005). In general, our results for the first time in fat-tailed sheep, showed that the 9-11th rib section can only predict physical, but not chemical, composition of fat-tailed lamb carcass.<br />To predict body composition of growing Afshari fat-tailed lambs using the 9-11th composition as a predictor of whole body composition, 10 lambs were randomly selected (43.9 ± 3.9; mean shrunk body weight; mean ± SD) and harvested accordingly. After slaughter, the 9-11th rib sections were harvested from chilled carcasses for 24 h; fat, lean, fat-tail and bone were weighted separately and total separable fat (without fat-tail) and lean were grounded twice to obtain a homogenous sample for further chemical analysis. Rib dissection separable lean, fat and bone percent were (mean ± SD) 33.9 ± 6.6, 23.6 ± 6.6, and 17.3 ± 7.4, respectively. In addition, rib dissection ether extract, crude protein, moisture, and ash percent were (mean ± SD) 27.6 ± 4.1, 19.3 ± 0.7, 49.6 ± 5.3, and 1.7 ± 0.3, respectively. Except for carcass separable bone percent (with and without fat-tail), it was shown that the 9-11th physical rib composition can properly predict the carcass separable fat (adjusted R2 of 0.62 and 0.86 with and without accounting for fat-tail, respectively; P < 0.01) and lean (adjusted R2 0.77 and 0.71 with and without accounting for fat-tail, respectively; P < 0.01). As for the carcass chemical composition, with or without accounting for fat-tail, none of rib chemical commotion based on as-is analysis predicted chemical carcass composition. However, when as-is data were represented as soft tissue dry matter, only rib crude protein (%, without accounting for fat-tail) could predict carcass crude protein (adjusted R2 = 0.60; P < 0.005). In general, our results for the first time in fat-tailed sheep, showed that the 9-11th rib section can only predict physical, but not chemical, composition of fat-tailed lamb carcass.<br />To predict body composition of growing Afshari fat-tailed lambs using the 9-11th composition as a predictor of whole body composition, 10 lambs were randomly selected (43.9 ± 3.9; mean shrunk body weight; mean ± SD) and harvested accordingly. After slaughter, the 9-11th rib sections were harvested from chilled carcasses for 24 h; fat, lean, fat-tail and bone were weighted separately and total separable fat (without fat-tail) and lean were grounded twice to obtain a homogenous sample for further chemical analysis. Rib dissection separable lean, fat and bone percent were (mean ± SD) 33.9 ± 6.6, 23.6 ± 6.6, and 17.3 ± 7.4, respectively. In addition, rib dissection ether extract, crude protein, moisture, and ash percent were (mean ± SD) 27.6 ± 4.1, 19.3 ± 0.7, 49.6 ± 5.3, and 1.7 ± 0.3, respectively. Except for carcass separable bone percent (with and without fat-tail), it was shown that the 9-11th physical rib composition can properly predict the carcass separable fat (adjusted R2 of 0.62 and 0.86 with and without accounting for fat-tail, respectively; P < 0.01) and lean (adjusted R2 0.77 and 0.71 with and without accounting for fat-tail, respectively; P < 0.01). As for the carcass chemical composition, with or without accounting for fat-tail, none of rib chemical commotion based on as-is analysis predicted chemical carcass composition. However, when as-is data were represented as soft tissue dry matter, only rib crude protein (%, without accounting for fat-tail) could predict carcass crude protein (adjusted R2 = 0.60; P < 0.005). In general, our results for the first time in fat-tailed sheep, showed that the 9-11th rib section can only predict physical, but not chemical, composition of fat-tailed lamb carcass.<br />To predict body composition of growing Afshari fat-tailed lambs using the 9-11th composition as a predictor of whole body composition, 10 lambs were randomly selected (43.9 ± 3.9; mean shrunk body weight; mean ± SD) and harvested accordingly. After slaughter, the 9-11th rib sections were harvested from chilled carcasses for 24 h; fat, lean, fat-tail and bone were weighted separately and total separable fat (without fat-tail) and lean were grounded twice to obtain a homogenous sample for further chemical analysis. Rib dissection separable lean, fat and bone percent were (mean ± SD) 33.9 ± 6.6, 23.6 ± 6.6, and 17.3 ± 7.4, respectively. In addition, rib dissection ether extract, crude protein, moisture, and ash percent were (mean ± SD) 27.6 ± 4.1, 19.3 ± 0.7, 49.6 ± 5.3, and 1.7 ± 0.3, respectively. Except for carcass separable bone percent (with and without fat-tail), it was shown that the 9-11th physical rib composition can properly predict the carcass separable fat (adjusted R2 of 0.62 and 0.86 with and without accounting for fat-tail, respectively; P < 0.01) and lean (adjusted R2 0.77 and 0.71 with and without accounting for fat-tail, respectively; P < 0.01). As for the carcass chemical composition, with or without accounting for fat-tail, none of rib chemical commotion based on as-is analysis predicted chemical carcass composition. However, when as-is data were represented as soft tissue dry matter, only rib crude protein (%, without accounting for fat-tail) could predict carcass crude protein (adjusted R2 = 0.60; P < 0.005). In general, our results for the first time in fat-tailed sheep, showed that the 9-11th rib section can only predict physical, but not chemical, composition of fat-tailed lamb carcass. To predict body composition of growing Afshari fat-tailed lambs using the 9-11th rib composition as a predictor of whole body composition, 10 lambs were randomly selected (43.9 ± 3.9; mean shrunk body weight; mean ± SD) and harvested accordingly. After slaughter, the 9-11th rib sections were harvested from chilled carcasses for 24 h; fat, lean, fat-tail and bone were weighted separately and total separable fat (without fat-tail) and lean were grounded twice to obtain a homogenous sample for further chemical analysis. Rib dissection separable lean, fat and bone percent were (mean ± SD) 33.9 ± 6.6, 23.6 ± 6.6, and 17.3 ± 7.4, respectively. In addition, rib dissection ether extract, crude protein, moisture, and ash percent were (mean ± SD) 27.6 ± 4.1, 19.3 ± 0.7, 49.6 ± 5.3, and 1.7 ± 0.3, respectively. Except for carcass separable bone percent (with and without fat-tail), it was shown that the 9-11th physical rib composition can properly predict the carcass separable fat (adjusted R2 of 0.62 and 0.86 with and without accounting for fat-tail, respectively; P < 0.01) and lean (adjusted R2 0.77 and 0.71 with and without accounting for fat-tail, respectively; P < 0.01). As for the carcass chemical composition, with or without accounting for fat-tail, none of rib chemical commotion based on as-is analysis predicted chemical carcass composition. However, when as-is data were represented as soft tissue dry matter, only rib crude protein (%, without accounting for fat-tail) could predict carcass crude protein (adjusted R2 = 0.60; P < 0.005). In general, our results for the first time in fat-tailed sheep, showed that the 9-11th rib section can only predict physical, but not chemical, composition of fat-tailed lamb carcass. https://animalscience.tabrizu.ac.ir/article_16036_b446527628d9f740a5ee48f517a3bd02.pdf