Centro IRTA

Monells, Spain

Centro IRTA

Monells, Spain
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Alberti P.,CSIC - Centro de Investigación y Tecnología Agroalimentaria | Gomez I.,Public University of Navarra | Mendizabal J.A.,Public University of Navarra | Ripoll G.,CSIC - Centro de Investigación y Tecnología Agroalimentaria | And 6 more authors.
Meat Science | Year: 2013

Forty-eight young Holstein bulls (slaughtered at 458.6 ± 9.79. kg body weight) were used to evaluate the effect of whole linseed and conjugated linoleic acid (CLA) supplementation on animal performance, adipose tissue development, and carcass characteristics. The animals were fed with one of four isoenergetic and isoproteic diets: control (0% linseed, 0% CLA), linseed (10% linseed, 0% CLA), CLA (0% linseed, 2% CLA), and linseed plus CLA (10% linseed, 2% CLA). Animal performance and carcass characteristics were unaffected by diet composition. Adding linseed or CLA to the concentrate diet did not result in significant differences in adipocyte size and number or lipogenic enzyme activity. However, while the frequency distribution of subcutaneous adipocyte diameters followed a normal distribution, the frequency distribution of intramuscular adipocyte diameters was not normal in any dietary group (skewness coefficients: 0.8, 1.2, 0.9, 0.8 for control, linseed, CLA, and linseed plus CLA, respectively; P. <0.05), indicative of adipocyte proliferation in the intramuscular adipose tissue. © 2013 Elsevier Ltd.


Gomez I.,Public University of Navarra | Mendizabal J.A.,Public University of Navarra | Sarries M.V.,Public University of Navarra | Insausti K.,Public University of Navarra | And 6 more authors.
Livestock Science | Year: 2015

Forty-eight young Holstein bulls were used to evaluate the effect of whole linseed and conjugated linoleic acid (CLA) supplementation on beef fatty acid profile in intramuscular and subcutaneous fat. Animals were fed one of four isoenergetic and isoproteic diets: control (0% linseed, 0% CLA), linseed (10% linseed, 0% CLA), CLA (0% linseed, 2% CLA), and linseed plus CLA (10% linseed, 2% CLA). The fatty acid profile had similar trends in intramuscular and subcutaneous fat when diets were enriched with linseed and/or CLA, increasing the level of CLA. c9,. t11 and α-linolenic acid (ALA), and decreasing the n-6/. n-3 fatty acid ratio. Supplementation with linseed improved the fatty acid profile by increasing the proportions of n-3 and CLA fatty acids and decreasing the n-6/. n-3 ratio compared with the control. CLA addition achieved similar CLA tissue levels to linseed supplementation, but similar n-3 proportions to the control. Linseed plus CLA supplementation was more effective in increasing total polyunsaturated fatty acids and CLA compared with their individual addition. It is concluded that supplementation of whole linseed and/or CLA in bulls resulted in an increase in beef fat of some fatty acids considered to be of potential benefit to human health. © 2015 Elsevier B.V.

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