Determining the effect of the fat-tail and carcass weight on meat fatty acid composition of Iranian lambs

Alizadeh, Abbas; Shahneh, Ahmad Zare; Yousefi, Ali Reza; Omran, Maryam Hadinezhad; Campbell, Anna W.

doi:10.1016/j.smallrumres.2013.06.004

Cited by 18 publications

(3 citation statements)

References 21 publications

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“…The degree of marbling is an important attribute of carcasses, and it is used as a visual cue by consumers to judge the quality of meat [ 36 ]. In the present study, the IMF values were within the range previously reported for lambs [ 37 ]. The IMF percentages of lambs were not significantly different across the four dietary treatment groups.…”

Section: Discussionsupporting

confidence: 90%

Effect of Dietary Inclusion of Azadirachta indica and Moringa oleifera Leaf Extracts on the Carcass Quality and Fatty Acid Composition of Lambs Fed High Forage Total Mixed Rations

Webb

Hassen

Olaniyi

et al. 2022

Animals

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There is an increased interest in the use of medicinal plants as alternatives to antibiotic growth promoters and as agents for methane production mitigation. This study investigated the effects of Azadirachta indica and Moringa oleifera feed additives on the carcass and meat quality of lambs. Forty South African Mutton Merino lambs, weighing between 29 and 43 kg, were randomly assigned to four treatment groups (n = 10 lambs/treatment) and fed a basal total mixed ration (TMR) containing soybean meal (17%), yellow maize (28%), Alfalfa hay (20%), Eragrostis curvula hay (22.2%), molasses (6.0%), wheat offal (5%), urea (0.8%) and vitamin premix (0.5%) on a DM basis. The dietary treatments: TMR diet (control); TMR diet with A. indica leaf extract (A. indica leaf extract at a dosage of 50 mg per kg of feed: neem); TMR diet with M. oleifera leaf extract (M. oleifera leaf extract at a dosage of 50 mg per kg DM of feed: moringa); TMR diet with monensin (at a dosage of 50 mg monensin sodium per kg of feed: positive control). After an adaptation period of 10 days to the experimental conditions, the lambs from all treatment groups were fed ad libitum with the experimental diets. The lambs were slaughtered at a live weight of 60–65 kg after a 23 week trial period. The plant extract dietary additives had no significant effects on the carcass characteristics of the lambs. In comparison to monensin, supplementing with moringa leaf extracts resulted in a higher proportion of C18:1n9c (45.0% ± 0.57 vs. 40.5% ± 0.80; p < 0.05), total MUFAs (47.3% ± 0.66 vs. 42.6% ± 0.87; p < 0.05), and UFA:SFA ratio (1.01 ± 0.03 vs. 0.85 ± 0.03; p < 0.05), which may be beneficial for human health. Our results suggest that natural feed additives, such as A. indica and M. oleifera leaf extracts, can be included in lamb diets without compromising meat fatty acid composition. The negative economic impacts of such technologies on animal production and farm profitability should not be expected.

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Section: Discussionsupporting

confidence: 90%

Effect of Dietary Inclusion of Azadirachta indica and Moringa oleifera Leaf Extracts on the Carcass Quality and Fatty Acid Composition of Lambs Fed High Forage Total Mixed Rations

Webb

Hassen

Olaniyi

et al. 2022

Animals

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“…The average hot carcass weight in this study was 15.75 kg, which is considered an average weight for sheep in Brazil that is easily marketed (12) . In Iran, lambs with light carcass weight (<13 kg) are used for grilling, usually in an open market setting (13) . The heavier lambs are most often sold in retail outlets.…”

Section: Discussionmentioning

confidence: 99%

Carcass Characteristics and Meat Quality in Cull Ewes at Different Ages

et al. 2018

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The objective of this trial was to evaluate carcass quality in 74 Santa Ines hair ewes aged 6 to 48 months. Slaughter occurred after fasting and electroshock, followed by dissection of the jugular veins and carotid arteries. Hot carcass weight, hot carcass yield, carcass length, skin thickness, shoulder, neck, loin, belly, rib and leg weights and percentages, leg length, and girth were measured. The rib eye area, color (by CIELAB system), shear force, and cooking loss were also measured. The data were analyzed using SAS procedures for analysis of variance, regressions, correlations, and principal components. Hot carcass weight was 15.75 kg and yield was 43.65%. Younger animals had higher leg yield while yields of loin and shoulder increased as age increased. The meat was darker in older animals. As age increased, both the quantity of commercial cuts decreased and the loss of quality traits, such as color, cooking loss, and shear force, increased; therefore, slaughter should be performed before 30 months of age.

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“…They reported that the fat‐tailed trait is consistent with a recessive mode of inheritance (Moradi et al, 2012) even if fat tail appears to be under a polygenic determinism. Currently, fat tail is not conducive to breeding programs (Li et al, 2018; Moradi et al, 2012; Zhu et al, 2021), because: (1) most of the fat is deposited in the tail, leading to decreased carcass and intermuscular fat deposits, which affects carcass percentage and meat quality (Alizadeh et al, 2013; Khaldari et al, 2007; Yousefi et al, 2012); (2) more feed is needed for fat deposition than for meat production (Sillence, 2004); and (3) large fat tail is a critical obstacle for ram fertility. However, it has been reported the size of fat tail does not have an effect on growth rate in sheep (Khaldari et al, 2020).…”

Section: Genetic Parameters Of Growth Carcass Composition and Meat Qu...mentioning

confidence: 99%

Genetic basis of muscle‐related traits in sheep: A review

et al. 2022

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Sheep is a major contributor to global food production among livestock and one of the great sources of red meat for human consumption. Several QTL and numerous genes with major and minor effects have been identified in association with the muscle characteristics in sheep breeds worldwide. Understanding the genetic background of growth and carcass-related traits in sheep is a major factor in increasing muscle growth, muscle hypertrophy and, eventually, meat production. This review concisely shows how major signaling pathways control skeletal muscle growth. Herein we aimed to discuss and summarize different research findings on genomic regions related to carcass traits and meat production in sheep. Several causative mutations with major effects on different muscle-related traits have been reported in various sheep breeds. A general overview of the studies on main candidate genes showed that some alleles have major phenotypic effects in different breeds with commercial and farm level usability. However, numerous genes with minor effects were also reported regarding the polygenic nature of muscle-related traits. The knowledge of the candidate genes involved in growth traits and their effects provides valuable information for breeding and selection of muscularity traits.

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Determining the effect of the fat-tail and carcass weight on meat fatty acid composition of Iranian lambs

Cited by 18 publications

References 21 publications

Effect of Dietary Inclusion of Azadirachta indica and Moringa oleifera Leaf Extracts on the Carcass Quality and Fatty Acid Composition of Lambs Fed High Forage Total Mixed Rations

Effect of Dietary Inclusion of Azadirachta indica and Moringa oleifera Leaf Extracts on the Carcass Quality and Fatty Acid Composition of Lambs Fed High Forage Total Mixed Rations

Carcass Characteristics and Meat Quality in Cull Ewes at Different Ages

Genetic basis of muscle‐related traits in sheep: A review

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