  QCD justification of SU(m/n) supergroups are shown to provide a basis for the
existence of an approximate hadronic supersymmetry. Effective Hamiltonian of
the relativistic quark model is derived, leading to hadronic mass formulae in
remarkable agreement with experiments. Bilocal approximation to hadronic
structure and incorporation of color through octonion algebra (based on
quark-antidiquark symmetry) is also shown to predict exotic diquark-antidiquark
($D-\bar{D}$) meson states. A minimal supersymmetric sceme based on $SU(3)^c
\times SU(6/1)$ that excludes exotics is constructed. Symmetries of three quark
systems and possible relativistic formulation of the quark model through the
spin realization of Wess-Zumino algebra is presented.
