Most observables measured at RHIC involve strongly interacting particles from final hadronic stage. They carry, however, useful information on the properties of the partonic matter produced in the initial stage and its hadronization dynamics. For example, the observed large elliptic flow of hadrons and their scaling according to their constituent quark numbers is consistent with the formation of an initial partonic matter that is strongly interacting and hadronizes via the coalescence or recombination of quarks. In this talk, this conclusion will be illustrated in the framework of a multiphase transport model that includes both initial partonic and final hadronic interactions as well as the transition between these two phases of matter. Also, using the phase-space distribution of strange quarks from this model, the collective dynamics of strange hadrons such as the phi meson and omega baryon will be discussed in a dynamical quark coalescence model that takes int!
o account the quark phase-space distributions inside hadrons.