  The ratios of partial widths for the decay of a glueball into two
pseudoscalar mesons are calculated under the assumption that the production of
light quark pairs ($u\bar u,d\bar d,s\bar s$) in soft gluon-\-induced reactions
goes on within universal symmetry breaking. Parameter of the violation of
flavour symmetry is fixed by the central hadron production data in high energy
hadron collisions and/or by the ratios of radiative decay amplitudes $J/\Psi
\to \gamma\eta/\gamma\eta'$ and $J/\Psi \to \gamma \phi \phi/\gamma \omega
\omega$. The ratios of coupling constants $glueball\to\pi\pi,K\bar K,
\eta\eta,\eta\eta'$ which are calculated with this parameter coincide
reasonably with those of $f_0(1500)$, supporting an idea about glueball nature
of $f_0(1500)$.
