  In scenarios with relatively light down squarks, motivated, e.g., by SO(10) D
terms, jets + missing $E_T$ signals can be observed at the luminosity upgraded
Tevatron even if the squarks are much heavier than the gluinos and the common
gaugino mass ($M_{{1/2}}$) at $M_G$ lies above the LEP allowed lower bound. In
the conventional mSUGRA model with heavy squarks practically no signal is
expected in this channel. The possiblity of distinguishing between various
SUGRA motivated scenarios by exploiting the missing $E_T$ and jet $p_T$
distributions, opposite sign dileptons + jets + missing $E_T$ events and clean
trilepton signals have been discussed.
