A polymorphism in the stearoyl-CoA desaturase gene promoter influences monounsaturated fatty acid content of Duroc × Iberian hams

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2015
Author
Henriquez Rodriguez, Eliana
Tor i Naudí, Marc
Pena i Subirà, Ramona Natacha
Estany Illa, Joan
Suggested citation
Henriquez Rodriguez, Eliana; Tor i Naudí, Marc; Pena i Subirà, Ramona Natacha; Estany Illa, Joan; . (2015) . A polymorphism in the stearoyl-CoA desaturase gene promoter influences monounsaturated fatty acid content of Duroc × Iberian hams. Spanish Journal of Agricultural Research, 2015. vol. 13, núm. 4, p. e0404 (8). https://doi.org/10.5424/sjar/2015134-8323.
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Abstract
Data on 74 dry-cured hams from Duroc × Iberian pigs were used to examine whether the tag polymorphism AY487830:g.2228T>C in the promoter region of the stearoyl-CoA desaturase [SCD] gene affect fat desaturation and monounsaturated fatty acid (MUFA) as previously described in purebred Duroc hams. Samples
were taken from sliced trays of dry-cured hams marketed as Jamón Ibérico de cebo, which were randomly purchased from the same supplier in different stores of the same supermarket chain. Genomic DNA was isolated from each sample to genotype for SCD and gender. Also, a sample of two slices was used to determine fat content and fatty acid (FA) composition by gas chromatography. The effect of the genotype (TT and CT) and gender (barrows and gilts) was estimated under a Bayesian setting. Results showed that the SCD polymorphism was associated to fat composition but not to fat content, with TT hams showing increased C18:1n-7, C18:1n-9, C20:1n-9 and MUFA (probability between 0.92-0.98) and decreased C18:2n-6, C20:4n-6 and polyunsaturated FA (PUFA) (probability between 0.91-0.99) as compared to the CT. As a result, the TT hams had more MUFA (0.95%) and a higher MUFA/PUFA ratio (0.43) than the CT. Barrows had more saturated FA (SFA) and less PUFA than gilts. No differences in MUFA content were found between genders. The SCD polymorphism had a greater impact on MUFA than using hams from barrows instead of gilts. It is concluded that the SCD polymorphism is a good tool to increase MUFA and MUFA/PUFA ratio in Duroc crossbred dry-cured hams.
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http://hdl.handle.net/10459.1/59690
DOI
https://doi.org/10.5424/sjar/2015134-8323
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Spanish Journal of Agricultural Research, 2015. vol. 13, núm. 4, p. e0404 (8)
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cc-by-nc (c) INIA, 2015
Except where otherwise noted, this item's license is described as cc-by-nc (c) INIA, 2015