In 2003, associated with the radial Minkowski additions of star bodies, Zhao and Leng established the dual Brunn–Minkowski inequality for intersection bodies. In this paper, associated with the L_{p} -radial Minkowski combinations of star bodies, we firstly prove the L_{p} -dual Brunn–Minkowski inequality for intersection bodies. Further, associated with the L_{p} -Minkowski combinations of convex bodies, we give the L_{p} -Brunn–Minkowski inequality for star dualities of intersection bodies.