  We suggest a new large-N_c limit for multi flavor QCD. Since fundamental and
two-index antisymmetric representations are equivalent in SU(3), we have the
option to define SU(N_c) QCD keeping quarks in the latter. We can then define a
new 1/N_c expansion (at fixed number of flavors N_f) that shares appealing
properties with the topological (fixed N_f/N_c) expansion while being more
suitable for theoretical analysis. In particular, for N_f=1, our large-N_c
limit gives a theory that we recently proved to be equivalent, in the bosonic
sector, to N=1 supersymmetric gluodynamics. Using known properties of the
latter, we derive several qualitative and semi-quantitative predictions for
N_f=1 massless QCD which can be easily tested in lattice simulations. Finally,
we comment on possible applications for pure SU(3) Yang-Mills theory and real
QCD.
