Fat deposition and partitioning for meat production in cattle and sheep

Liu, Shimin; Yang, Yanyan; Luo, Hailing; Pang, Wenjie; Martin, Graeme B.

doi:10.1016/j.aninu.2024.03.003

Cited by 1 publication

(1 citation statement)

References 105 publications

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“…More efficient lambs have leaner meat ( Zhang et al, 2023 ), due to the higher energy cost of fat deposition compared to protein deposition. The energy allocation of adipose tissue is 39.3 kJ/g compared to 23.1 kJ/g for other organic components, such as proteins ( Liu et al, 2024 ). Consequently, the energy demand for fat deposition is substantially higher, agreeing with previous reports where inclusion of SM significantly decreased FE in lambs ( van Cleef et al, 2018 ; Rodrigues et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Soybean molasses increases subcutaneous fat deposition while reducing lipid oxidation in the meat of castrated lambs

Pereira-Junior,

Costa,

Rodrigues

et al. 2024

Journal of Animal Science

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This study aimed to evaluate the effect of including soybean molasses (SM) on performance, blood parameters, carcass traits, meat quality, fatty acid and muscle (longissimus thoracis) transcriptomic profiles of castrated lambs. Twenty Dorper × Santa Inês lambs (20.06 ± 0.76 kg BW) were assigned to a randomized block design, stratified by BW, with the following treatments: CON - 0 g/kg of SM and SM20 - 200 g/kg of SM on DM basis, allocated in individual pens. The diet consisted of 840 g/kg concentrate and 160 g/kg corn silage for 76 days, with the first 12 days as an adaptation period and the remaining 64 days on the finishing diet. The SM20 diet increased blood urea concentration (P = 0.03) while reduced glucose concentration (P = 0.04). Lambs fed SM showed higher subcutaneous fat deposition (P = 0.04) and higher subcutaneous adipocyte diameter (P < 0.01), in addition to reduced meat lipid oxidation (P < 0.01). Soybean molasses reduced the quantity of branched-chain fatty acids in longissimus thoracis (P = 0.05) and increased the quantity of saturated fatty acids (P = 0.01). In the transcriptomic analysis, 294 genes were identified as differentially expressed, which belong to pathways such as oxidative phosphorylation, citric acid cycle, and monosaccharide metabolic process. In conclusion, diet with SM increased carcass fat deposition, reduced lipid oxidation, and changed the energy metabolism, supporting its use in ruminant nutrition.

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