SUMMARY
Tannins, phytic phosphorus, phytase activity in the seed of 12 sorghum grain hybrids (Sorghum bicolor (L) Moench)
In order to evaluate the variability in concentration of secondary metabolites among grains from different sorghum hybrids (Sorghum bicolor (L) Moench) and provide some information for rational use in animal feeds, grain samples were collected from 12 hybrids (Criollo 1, Criollo 27, Chaguaramas III, Chaguaramas VII, Cristiani Burkard H-8046-2, Guanipa 95, Himeca 101, Himeca 400, Pioneer 81-G67, Pioneer 83-G88, Pioneer 86-P42 y Tecsem 120) sowed on 2008 in the Turén municipality, Portuguesa State-Venezuela. Using standardized analytical methods, hybrids showed polyphenolics compounds contents (0.92 ± 0.37% TaE), total (0.61 ± 0.29% TaE) and condensed tannins (0.95 ± 0.65% LeuE), phytic phosphorus (0.17 ± 0.03%) and intrinsic phytase activity (12.3 ± 6.74 U/kg) in the ranges described in the literature, with an important variation among hybrids that must be considered for their inclusion levels in the formulation of balanced feeds, as well as plant breeding programs.

Key words: Tannins, phytic phosphorus, phytase activity, Sorghum bicolor.



Recibido: 13/08/2009
Aceptado: 21/11/2009

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