The fresh fruit market of yellow passion fruit values the quality of internal and external fruits. Thus, the objective of this study was to evaluate the effect of the rootstocks and type of grafting in quality of yellow passion fruit (Passiflora edulis Sims). The experiment was carried in Adamantina, SP, Brazil, from April 2006 to June 2007, adopting the experimental design in randomized blocks in a 3 x 2 factorial scheme and an additional treatment, with four replicates. The studied rootstocks were: P. edulis (yellow passion fruit), P. alata (sweet passion fruit) and P. gibertii (giberti passion fruit), in two types of grafting, hypocotyledonary and conventional, by cleft grafting method and one additional treatment, no grafted. The evaluated variables were: fruits length, diameter, fresh mass and classification from November 2006 to April 2007, the mass and the thickness of the peel of fruits, juice yield, total soluble solids (TSS) and titratable acidity of fruits (TA) and total soluble solid/titratable acidity relation (TSS/TA) in December 2006. The fruits diameter and mass obtained of rootstock plants on P. gibertii were inferior in no grafted plants and in plants of rootstock on P. alata. The bigger fruits lengths were obtained in no grafted plants. The different rootstocks did not promote difference in the TSS, TA and ratio. The grafting method did not affect the fruits length, diameter and mass, the mass and thickness of the peel, the juice yield and the TSS.
yellow passion fruit; Passifloraceae; fruit quality