The electric dipole transition probabilities, the oscillator strengths and the lifetimes of excited levels have been calculated using the weakest bound electron potential model theory (WBEPMT) and the quantum defect orbital theory (QDOT) for singly ionized Zinc. In the calculations, the many of transition arrays including both multiplet and fine-structure transitions are considered. We have employed numerical Coulomb approximation (NCA) wave functions and numerical non-relativistic Hartree-Fock (NRHF) wave functions for expectation values of radii in determination of parameters. The present results are consistent with the available theoretical and experimental results. Some of these results are reported for the first time. © 2013 Elsevier Ltd.