  A ten-dimensional supersymmetric gauge theory is written in terms of N=1, D=4
superfields. The theory is dimensionally reduced over six-dimensional coset
spaces. We find that the resulting four-dimensional theory is either a softly
broken N=1 supersymmetric gauge theory or a non-supersymmetric gauge theory
depending on whether the coset spaces used in the reduction are non-symmetric
or symmetric. In both cases examples susceptible to yield realistic models are
presented.
