Resumen

QUISIRUMBAY-GAIBOR, Jimmy  y  VILCHEZ-PERALES, Carlos. Meta-analysis: effect of selenium dietary supplementation on tissue concentration in pigs. Scientia Agropecuaria [online]. 2019, vol.10, n.3, pp.369-375. ISSN 2077-9917.  http://dx.doi.org/10.17268/sci.agropecu.2019.03.07.

A meta-analysis of the effect of selenium supplementation on tissue concentration in pigs was developed. 13 scientific articles were used, including 2114 animals. Under the random effects model effect size, heterogeneity and meta-regressions were determined. Supplementation generates a high concentration of selenium in kidney (2.51 ppm) and less amount in blood (0,151 ppm); muscle (0.189 ppm) and liver (0.564 ppm) have intermediate values. In addition, inorganic selenium resulted in higher concentrations in kidney (2.74 ppm) and blood (0.157 ppm), and the organic form allowed more selenium to be concentrated in liver (0.568 ppm) and muscle (0.237 ppm). However, the effect was not consistent among studies which was reflected by high values in the inconsistency test (>72%). The tissue concentration of selenium is affected by the number of repetitions, animals per experimental unit, individuals sampled per experimental unit and by the supplemented selenium level. This work concludes that organic and inorganic sources of selenium promote tissue retention; however, the concentration of this mineral is significantly affected by the factors mentioned above.

Palabras clave : dietary supplementation; tissue concentration; selenium; inorganic; organic.

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