Effects of quantitative feed restriction and sex on carcass traits, meat quality and meat lipid profile of Morada Nova lambs

Thiago L.A.C.de Araújo; Ronaldo L.Oliveira; Elz(a)nia S.Pereira; Ivone Y.Mizubuti; Ana C.N.Campos; Marília W.F.Pereira; Eduardo L.Heinzen; Hilton C.R.Magalh(a)es; Leilson R.Bezerra; Luciano P da Silva

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Effects of quantitative feed restriction and sex on carcass traits, meat quality and meat lipid profile of Morada Nova lambs

机译：定量限饲和性别对Morada Nova羔羊car体性状，肉品质和肉脂谱的影响

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Background:An experiment was conducted to evaluate the effects of feed restriction (FR) and sex on the quantitative and qualitative carcass traits of Morada Nova lambs.Thirty-five animals with an initial body weight of 14.5 ± 0.89 kg and age of 120 d were used in a completely randomized study with a 3 × 3 factorial scheme consisting of three sexes (11 entire males,12 castrated males and 12 females) and three levels of feeding (ad libitum-AL and 30％ and 60％ FR).Results:Entire males presented greater hot and cold carcass weights (P ＜ 0.05),followed by castrated males and females.However,the hot carcass yield was higher for females and castrated males than for entire males.Luminosity values were influenced (P ＜ 0.05) by sex,with entire males presenting higher values than castrated males and females.Females showed higher (P ＜ 0.05) concentrations of linoleic acid and arachidonic acid in the meat of the Iongissimus thoracis muscle.The meat of animals submitted to AL intake and 30％ FR showed similar (P ＞ 0.05) concentrations,and the concentrations of palmitic acid,palmitoleic acid,stearic acid,oleic acid and conjugated linoleíc acid were higher (P ＜ 0.05) than those of animals with 60％ FR.The meat of females had a higher ω6/ω3 ratio and lower h/H ratio,and females had greater levels of feeding.The meat of animals on the 60％ FR diet had a greater ω6/ω3 ratio,lower h/H ratio and lower concentration of desirable fatty acids in addition to a greater atherogenicity index (Al) and thrombogenicity index (TI).Conclusion:Lambs of different sexes had carcasses with different quantitative traits without total influence on the chemical and physical meat characteristics.The lipid profile of the meat was less favorable to consumer health when the animals were female or submitted to 60％ feed restriction.

机译：背景：进行了一项实验，以评估饲料限制（FR）和性别对Morada Nova羔羊的cas体数量和质量的影响.35只动物的初始体重为14.5±0.89 kg，年龄为120 d在一项完全随机的研究中使用3×3因子分解方案，由三个性别（11个完整男性，12个cast割的男性和12个女性）和三个喂养水平（随意AL和30％和60％FR）组成。整个雄性presented体的冷，热体重均较高（P ＜0.05），其次是去势雄性和雌性。然而，雌性和去势雄性的热car体产量高于整个雄性。光度值受到（P ＜0.05）的影响。性别，整个雄性比cast割的雄性和雌性具有更高的价值。雌性在ongissimus胸肌肌肉中的亚油酸和花生四烯酸浓度较高（P ＜0.05）。动物的肉类需摄入AL和30％FR显示棕榈酸，棕榈酸，硬脂酸，油酸和共轭亚油酸的浓度相近（P＞ 0.05），而FR为60％的动物则较高（P ＜0.05）。 ω6/ω3比值和h / H比值较低，雌性的摄食水平较高。以60％FR饮食的动物肉的ω6/ω3比值较高，h / H比值较低，并且所需脂肪酸的浓度较低结论：不同性别的羔羊的cas体具有不同的数量性状，而对肉的化学和物理特性没有完全的影响。肉的脂质特性对消费者不利动物为雌性或饲料限制为60％时的健康状况。

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《畜牧与生物技术杂志(英文版)》 |2017年第4期|992-1003|共12页
作者
Thiago L.A.C.de Araújo; Ronaldo L.Oliveira; Elz(a)nia S.Pereira; Ivone Y.Mizubuti; Ana C.N.Campos; Marília W.F.Pereira; Eduardo L.Heinzen; Hilton C.R.Magalh(a)es; Leilson R.Bezerra; Luciano P da Silva;
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作者单位

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

Department of Animal Science, School of Veterinary Medicine and Animal Science/Federal University of Bahia, Salvador City, Bahia State 40.170-110, Brazil;

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

Department of Animal Science, State University of Londrina, Londrina 86051990, Paraná, Brazil;

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

Laboratory of Sensory Analysis, Agency for Agricultural Research(EMBRAPA-Tropical Agroindustry), Fortaleza 60511110, Ceará, Brazil;

Department of Animal Science, Campus Professora Cinobelina Elvas, Federal University of Piauí, Bom Jesus 64900000, Piaui, Brazil;

Department of Animal Science, Federal University of Ceara, Fortaleza 60356001, Ceara, Brazil;

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Effects of quantitative feed restriction and sex on carcass traits, meat quality and meat lipid profile of Morada Nova lambs

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