An experiment was installed in Bebedouro, SP, Brazil in 1997, with the aim of evaluate the effect of the rootstocks 'Rangpur' lime (C. limonia Osbeck), 'Swingle' citrumelo (P. trifoliata Raf. x C. paradisi Macf.), 'Cleopatra' mandarin (Citrus reshni Hort. ex Tan.) and 'Orlando' tangelo (C. reticulata Blanco x C. paradisi Macf.) on plant growth, yield and fruit quality of 'Fremont' mandarin (C. clementina Hort. ex Tan. X C. reticulata Blanco). Despite that differences in yield have been registered related to the rootstocks between 2003 to 2005; cumulative yield from 2000 to 2006 seasons was not affected by the rootstock. Alternate bearing index and yield efficiency values were not influenced by the rootstocks. Fruits from trees on 'Swingle' citrumelo and 'Cleópatra' mandarin had higher values of total soluble solids concentration and total acids. Trunk diameter and canopy volume values were higher in trees on 'Orlando' tangelo and 'Cleopatra' mandarin.