Effects of mechanical treatment of whole canola seeds on carcass composition and blood lipids of lambs fed grass silage

Huard, Sylvain; Seoane, Joan; Petit, H.V.; Fahmy, M. H.; Rioux, R.

doi:10.4141/a97-119

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Previously, the in vitro biohydrogenation rate of 18:1c-9 was reportedly similar between raw and extruded canola, being half that of PUFA (Enjalbert et al, 2003). When feeding ruminants processed canola, the lower biohydrogenation rate and higher intestinal absorption of 18:1c-9 has resulted in an appreciable transfer to milk (Tymchuk et al, 1998) and adipose tissue (Huard et al, 1998). In agreement with the CLA index, higher concentrations of 14:1c-9 and 16:1c-9 associated with the Trial 1 canola diet, as shown in Tables 2 and 3, suggest a reduction in SCD activity caused by the higher dietary PUFA levels of the linseed and soya bean diets.…”

Section: Total Lipidsmentioning

confidence: 99%

Influence of oilseed supplement ranging in n-6/n-3 ratio on fatty acid composition and Δ5-, Δ6-desaturase protein expression in steer muscles

Turner

Mitchell

Duynisveld

et al. 2012

Animal

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This study investigated effects of roasted or extruded oilseed supplementation ranging in n-6/n-3 ratios from 0.3 to 5.0 on the fatty acid composition and expression of delta-5 desaturase (D5d) and D6-desaturase (D6d) protein in commercial steer cheek (m. masseter) and diaphragm (pars costalis diaphragmatis) muscles. In general, the n-6/n-3 ratio of the diet had a subsequent effect on the muscle n-6/n-3 ratio (P , 0.05), with muscle 18:2n-6 and 18:3n-3 content relating to proportion of dietary soya bean and linseed (P , 0.01). Compared with canola, pure linseed and soya bean diets reduced 14:1c-9 and 16:1c-9 (P , 0.05) but increased 18:1t-11 and c-9,t-11 conjugated linoleic acid (CLA) content (P , 0.01). Oilseed processing had a minor influence but extruded oilseeds increase 18:1t-11 and c-9,t-11 CLA compared with roasted (P , 0.05). Polar lipid 18:3n-3 and n-3 long-chain polyunsaturated fatty acid (LC, >20 carbons PUFA) derivative content increased in relation to dietary linseed supplementation in the diaphragm (P , 0.01), whereas only 18:3n-3 was increased in the cheek (P , 0.01). Protein expression did not differ between diets; however, in each muscle the D5d protein expression had a stronger association with the desaturase products rather than the precursors. The relationship between D5d protein expression and the muscle LC n-6/n-3 ratio was negative in both muscles (P , 0.05). The relationship between D6d protein expression and the LC n-6/n-3 ratio was positive in the cheek (P , 0.001) and negative in the diaphragm (P , 0.05). In conclusion, diet n-6/n-3 ratio affected muscle 18:2n-6 and 18:3n-3 deposition, whereas the D5d and D6d protein expression had some influence on the polar lipid LC-PUFA profile. Results reaffirm that processed oilseeds can be used to increase the proportion of fatty acids potentially beneficial for human health, by influencing the formation of LC-PUFA and reducing the n-6/n-3 ratio.

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Section: Total Lipidsmentioning

confidence: 99%

Influence of oilseed supplement ranging in n-6/n-3 ratio on fatty acid composition and Δ5-, Δ6-desaturase protein expression in steer muscles

Turner

Mitchell

Duynisveld

et al. 2012

Animal

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Effect of rearing system on muscle lipids of gilts and castrated male pigs

Högberg¹,

Picková²,

Dutta³

et al. 2001

Meat Science

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Insights into the influence of diet and genetics on feed efficiency and meat production in sheep

Chacko Kaitholil,

Mooney,

Aubry

et al. 2023

Animal Genetics

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Feed costs and carcass yields affect the profitability and sustainability of sheep production. Therefore, it is crucial to select animals with a higher feed efficiency and high‐quality meat production. This study focuses on the impact of dietary and genetic factors on production traits such as feed efficiency, carcass quality, and meat quality. Diets promote optimal sheep growth and development and provide sufficient protein can lead to higher‐quality meat. However, establishing an optimized production system requires careful consideration and balance of dietary parameters. This includes ensuring adequate protein intake and feeding diets with higher intestinal absorption rates to enhance nutrient absorption in the gut. The study identifies specific genes, such as Callipyge, Calpastatin, and Myostatin, and the presence of causal mutations in these genes, as factors influencing animal growth rates, feed efficiency, and meat fatty acid profiles. Additionally, variants of other reported genes, including PIGY, UCP1, MEF2B, TNNC2, FABP4, SCD, FASN, ADCY8, ME1, CA1, GLIS1, IL1RAPL1, SOX5, SOX6, and IGF1, show potential as markers for sheep selection. A meta‐analysis of reported heritability estimates reveals that residual feed intake (0.27 ± 0.07), hot carcass weight (0.26 ± 0.05), dressing percentage (0.23 ± 0.05), and intramuscular fat content (0.45 ± 0.04) are moderately to highly heritable traits. This suggests that these traits are less influenced by environmental factors and could be improved through genetic selection. Additionally, positive genetic correlations exist between body weight and hot carcass weight (0.91 ± 0.06), dressing percentage (0.35 ± 0.15), and shear force (0.27 ± 0.24), indicating that selecting for higher body weight could lead to favorable changes in carcass quality, and meat quality.

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Effects of mechanical treatment of whole canola seeds on carcass composition and blood lipids of lambs fed grass silage

Cited by 4 publications

References 10 publications

Influence of oilseed supplement ranging in n-6/n-3 ratio on fatty acid composition and Δ5-, Δ6-desaturase protein expression in steer muscles

Influence of oilseed supplement ranging in n-6/n-3 ratio on fatty acid composition and Δ5-, Δ6-desaturase protein expression in steer muscles

Effect of rearing system on muscle lipids of gilts and castrated male pigs

Insights into the influence of diet and genetics on feed efficiency and meat production in sheep

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