  In this paper, we provide a construction of the so-called backbone
decomposition for multitype supercritical superprocesses. While backbone
decompositions are fairly well-known for both continuous-state branching
processes and superprocesses in the one-type case, so far no such
decompositions or even description of prolific genealogies have been given for
the multitype cases. Here we focus on superprocesses, but by turning the
movement off, we get the prolific backbone decomposition for multitype
continuous-state branching processes as an easy consequence of our results.
