  Among the firm predictions of softly broken supersymmetry is the identity of
gauge couplings and the corresponding Yukawa couplings between gauginos,
sfermions and fermions. In the event that a SUSY-like spectrum of new particles
is discovered at future colliders, a key follow-up will be to test these
relations experimentally. In detailed studies it has been found that the
SUSY-Yukawa couplings of the electroweak sector can be studied with great
precision at the ILC, but a similar analysis for the Yukawa coupling of the
SUSY-QCD sector is far more challenging. Here a first phenomenological study
for determining this coupling is presented, using a method which combines
information from LHC and ILC.
