Sum rules in the superpartner spectrum of the minimal supersymmetric standard model

Assuming that the universal sum rules for soft supersymmetry-breaking terms, which have been recently found both in four-dimensional superstring models and in supersymmertic gauge-Yukawa unified gauge models, are satisfied above and at the grand unification scale, we investigate their low energy consequences and derive sum rules in the superpartner spectrum of the minimal supersymmetric standard model (MSSM). These sum rules contain only observable parameters of the MSSM, and could be experimentally verified in future.