Pêra sweet orange [Citrus sinensis (L.) Osbeck] is the most largely grown variety of citrus in Brazil. The origin of this variety is uncertain, but it is probable that it derived from the ‘Berna’ or ‘Verna Peret’ orange from Spain. Pêra orange trees have tissues that are partially susceptible to citrus tristeza virus and develop stem pitting. The use of pre-immunization or cross protection has produced the Pêra IAC clone, which became of widespread use, starting in the 1970´s decade. Other selections, naturally infected with mild virus strains, have being used in commercial orchards. This paper also reports some aspects related to fruit quality, bud union crease with certain rootstocks as well as the behavior of Pera seedlings when used as rootstock.