  We analyze how the measurements of the low-energy spectrum of cosmic
antiprotons can provide information on relic neutralinos. The analysis is
focused on the light neutralinos which emerge in supersymmetric schemes where
gaugino-mass unification is not assumed. We determine which ranges of the
astrophysical parameters already imply stringent constraints on the
supersymmetric configurations and those ranges which make the antiproton flux
sensitive to the primary component generated by the neutralino
self-annihilation. Our results are derived from some general properties of the
antiproton flux proved to be valid for a generic cold dark matter candidate.
