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We derive the non-universal gaugino mass ratios in a supergravity (SUGRA)framework where the Higgs superfields belong to the non-singlet representations{\bf 54} and {\bf 770} in a SO(10) Grand Unified Theory (GUT). We evaluate theratios for the phenomenologically viable intermediate breaking chain $SU(4)_C\times SU(2)_L \times SU(2)_R (G_{422})$. After a full calculation of thegaugino mass ratios, noting some errors in the earlier calculation for {\bf54}, we obtain, using the renormalisation group equations (RGE), interestinglow scale phenomenology of such breaking patterns. Here, we assume the breakingof the SO(10) GUT group to the intermediate gauge group and that to theStandard Model (SM) take place at the GUT scale itself. We also study thecollider signatures in multilepton channels at the Large Hadron Collider (LHC)for some selected benchmark points allowed by the cold dark matter relicdensity constraint provided by the WMAP data and compare these results with theminimal supergravity (mSUGRA) framework with similar gluino masses indicatingtheir distinguishability in this regard.

Gaugino mass non-universality in an SO(10) supersymmetric Grand Unified Theory: low-energy spectra and collider signals