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

Araújo, Thiago Luís Alves Campos de; Pereira, Elzânia Sales; Mizubuti, Ivone Yurika; Campos, Antônia do Carmo Soares; Pereira, Marília Williani Filgueira; Heinzen, Eduardo Luiz; Magalhães, Hilton César Rodrigues; Bezerra, Leílson Rocha; Silva, Luciano P da; Oliveira, Ronaldo Lopes

doi:10.1186/s40104-017-0175-3

Cited by 37 publications

(34 citation statements)

References 58 publications

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“…The number of muscle fibres is fixed soon after birth, and lamb weight increase depends primarily on muscle fibre growth including the gradual increases in muscle fibre diameter, area and length (Joubert, ). There is a close relationship between the muscle fibre morphological characteristics and meat quality (de Araújo et al, ; Arsenos et al, ). Several studies have confirmed that muscle fibre diameter and density closely relate to muscle tenderness and water power (Mandell et al, ; Wood et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…The proper growth and development of growing lambs largely depend on the nutrition level, and increasing dietary energy levels generally can improve the average daily gain (ADG) and feed efficiency of sheep (Ebrahimi, Ahmadi, Zamiri, & Rowghani, 2007;Hosseini et al, 2008;Song et al, 2018), while insufficient nutrition, especially of energy, reduces the growth performance of intensively managed sheep (Bellof & Pallauf 2004;Cameron & Speakman 2010;Kim et al, 2017). Some studies indicate that metabolizable energy intake can influence serum biochemical indices (Song et al, 2018), meat composition and quality (de Araújo et al, 2017;Arsenos et al, 2002), lipid metabolism and fatty acid profiles (Zhang, Liu, Brown, & Wu, 2015). The metabolizable energy restriction reduces the intramuscular fat concentrations and fat deposition indexes of sheep (Song et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Wang

Hussain

et al. 2020

Animal Physiology Nutrition

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This experiment was conducted to investigate the effects of different dietary energy levels on growth performance, slaughter traits, meat quality and blood biochemical parameters in fattening male Hu lambs. Sixty lambs were fed five iso‐protein diets which contained different levels of metabolizable energy in a completely randomized design for 70 days. At the end of study, fifteen lambs were harvested for further study. With the increase in dietary energy level, the daily weight gain and dry matter intake extremely increased (p < .001), and feed conversion ratio decreased significantly (p < .01). The live weight before slaughter (LWBS) and carcass weight had a significant increase (p < .05), non‐carcass fat ratio and routine indexes of meat quality had no significant difference. Almost no effect was observed for the amino acid profile except for glycine concentration decreased (p < .05) in longissimus dorsi (LD) muscle. The concentrations of C17:0, C18:3n‐3 and n‐3 PUFA (p < .01) significantly decreased with the increasing dietary energy levels, and the ratio of ∑n‐6/∑n‐3 (p < .01) increased, whereas the concentrations of C18:1n‐9t (p < .05) decreased in LD muscle and C18:1 (p < .01) increased in biceps femoris (BF) muscle. There were no obviously differences for diameter, area and density of muscle fibres. The relative expression of MyHC‐IIa and MyHC‐IIx decreased significantly (p < .05) in BF muscle, and the relative expression of MyHC‐IIa displayed an obviously decreasing trend (p < .10) in LD muscle. These results suggest that increasing the dietary energy level can improve the growth performance and slaughter traits, and influence meat quality and fatty acid profiles in different muscle tissues of fattening male Hu lambs. These results provide a theoretical basis for developing Hu sheep nutritional standards and designing feed formulations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Wang

Hussain

et al. 2020

Animal Physiology Nutrition

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“…These results differ from previous studies using broilers, in which feed restriction tends to reduce fat content in breast and thigh muscles (Wang et al, 2010) and reduce hepatic triglyceride content (Yang et al, 2010b). In lambs, feed restriction reduces total fatty acid, saturated fatty acid, and unsaturated fatty acid levels in the longissimus thoracis muscle (de Araújo et al, 2017). In the present study, the Pair-F group had increased hepatic content of C14:0 and reduced contents of C15:0, C17:0, C18:0, C20:0, C20:4n6, and C22:0, as well as reduced total fatty acid, saturated fatty acid, and unsaturated fatty acid contents, compared with Thr-D and Thr-S groups.…”

Section: Discussionmentioning

confidence: 99%

Transcriptome Analysis Reveals Differential Expression of Genes Regulating Hepatic Triglyceride Metabolism in Pekin Ducks During Dietary Threonine Deficiency

et al. 2019

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Dietary threonine (Thr) deficiency increases hepatic triglyceride accumulation in Pekin ducks, which results in fatty liver disease and impairs hepatic function. However, the underlying molecular mechanisms altered by dietary Thr deficiency are still unknown. To identify the underlying molecular changes, 180 one-day-old ducklings were divided into three groups, including Thr deficiency group (Thr-D), Thr sufficiency group (Thr-S), and pair-fed group (Pair-F) that was fed with a Thr-sufficient diet but with reduced daily feed intake. The results showed that feed intake was similar between Thr-D and Pair-F groups, but weight gain rate and final body weight in the Thr-D group were lower than those in the Pair-F group. Feed intake, weight gain, and body weight in Thr-D and Pair-F groups were lower than those in the Thr-S group. The Thr-D diet reduced abdominal fat percentage but increased hepatic triglyceride content when compared with that of the Thr-S and Pair-F groups. The Pair-F reduced hepatic levels of C15:0, C17:0, C18:0, C20:0, C20:4n6, and C22:0 and also reduced total fatty acid, saturated fatty acid, and unsaturated fatty acid content when compared with those of the Thr-D and Thr-S groups. The Thr-D diet increased hepatic content of C6:0, C17:1, C18:3n6, C20:0, C20:1n9, and C22:2, as well as reduced the content of C18:2n6t and C23:0 when compared with those of the Thr-S group. Transcriptome analysis in the liver indicated that the Thr-D diet upregulated genes related to fatty acid and triglyceride synthesis and downregulated genes related to fatty acid oxidation and triglyceride transport. Gene ontology analysis showed that more genes related to lipid metabolism processes and molecular function were differentially expressed in the Thr-D group relative to Thr-S and Pair-F groups than in the Pair-F group relative to the Thr-S group. KEGG pathway analysis showed that differentially expressed genes were enriched in signal transduction, immune, hormone, lipid, and amino acid metabolism pathways. Our findings indicated that the Thr-D diet increased hepatic triglyceride and fatty acid accumulation via increasing fatty acid and triglyceride synthesis and reducing fatty acid oxidation and triglyceride transport. These findings provide novel insights into our understanding of the molecular mechanisms underlying fat accumulation in the liver caused by dietary threonine deficiency.

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“…Consequently, grass quantity and quality influences ME balance and glucose homeostasis (Daza et al, 2007). Furthermore, ME intake dictates growth performance (Cameron and Speakman, 2011;Kim et al, 2017) and meat composition and quality (Arsenos et al, 2002;de Araújo et al, 2017). Lamb growth performance is a major production management indicator while meat quality and flavor are related to consumer satisfaction.…”

Section: Introductionmentioning

confidence: 99%

The effect of periodic energy restriction on growth performance, serum biochemical indices, and meat quality in sheep

Song

Zhao

et al. 2018

Journal of Animal Science

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Energy is a key factor regulated by the neuroendocrine system. The objective of this study was to compare growth performance, serum biochemical indices, carcass traits, meat quality, and nutrient composition of lambs fed restricted metabolizable energy (ME) intakes to mimic the seasonal changes of the natural grasslands of northwest China. Nineteen male Dorper × Small Tailed Han lambs were assigned to treatments, control (CON) fed at 1.0 MJ/W 0.75 × d −1 throughout the 180 d study, and restricted ME (RES) fed by sequentially restricting ME every 30 d (0.56, 0.84, 1.0, 0.84, 0.56, and 0.28 MJ/W 0.75 × d −1). Lambs were harvested at the end of the study. Lambs fed the CON diet demonstrated higher (P < 0.05) average daily gain (ADG) compared with RESfed lambs (158.79 and 57.01 g/d, for CON and RES, respectively), although ADG were lower in each period with the last period being a negative ADG for RES-fed lambs resulting in a loss of body weight. Both treatments demonstrated lower ADG in the last 3 study periods compared with the first 2 periods, which may be explained by cold stress (<−3 °C) increasing the lamb's energy requirement. Feeding lambs a restricted ME diet resulted in lower (P < 0.05) blood serum glucose, triglycerides, total protein, calcium, phosphorus, immunoglobulin G, immunoglobulin M, and immunoglobulin A concentrations compared with CON-fed lambs, but both treatments were similar (P > 0.05) for cholesterol and high-density lipoprotein-cholesterol. Feeding lambs a restricted ME diet increased (P < 0.05) meat pH, while reducing the cooked meat rate compared with CON-fed lambs. Thus, the carcass yield, rib eye muscle area, and shear force were lower (P < 0.05) for RES-fed lambs compared with CON-fed lambs. The meat water concentration was higher (P < 0.05), whereas the concentrations of dry matter, crude fat, crude protein, and carbohydrate were lower (P < 0.05) for lambs fed a RES ME diet compared to CONfed lambs. These results demonstrate that sequentially restricting ME intake, as natural grasslands might experience during seasonal forage quality and quantity changes, resulted in a reduction of body weight because lambs were mobilizing body reserves as a source of ME. The reduction in concentrations of key serum nutrients, as well as carcass traits and meat composition, demonstrate the body is responding to the meet the lambs ME requirements, which has implications for both meat quality and the animal's physiological functions.

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

Cited by 37 publications

References 58 publications

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Transcriptome Analysis Reveals Differential Expression of Genes Regulating Hepatic Triglyceride Metabolism in Pekin Ducks During Dietary Threonine Deficiency

The effect of periodic energy restriction on growth performance, serum biochemical indices, and meat quality in sheep

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