  The chiral symmetry breaking transition of quarks in the fundamental and
adjoint representation is studied in a model where the gap equation contains
two contributions, one containing a confining propagator and another
corresponding to the exchange of one-dressed dynamically massive gluons. When
quarks are in the fundamental representation the confinement effect dominates
the chiral symmetry breaking while the gluon exchange is suppressed due to the
dynamical gluon mass effect in the propagator and coupling constant. In this
case the chiral and deconfinement transition temperatures are approximately the
same. For quarks in the adjoint representation, due to the larger Casimir
eigenvalue, the gluon exchange is operative and the chiral transition happens
at a larger temperature than the deconfinement one.
