Self incompatibility in passion fruit: evidence of two locus genetic control

The self-incompatibility in yellow passion fruit was previously described a s homomorphic sporophytic with monofactorial inheritance. Five progenies we re obtained by bud-selfing. The plants of these progenies were selfed. reci procally crossed within each progeny and crossed with known incompatible ph enotypes to identify their phenotypic group. Fruit set was evaluated at the 7th day after pollination. Two progenies consisted of two self-incompatibl e groups, the other three formed three suck groups. The groups were identif ied as S-1, S-2, S-3, S-4, S-5 and S-6. The results provide evidence that t he self-incompatibility of passion fruit is controlled by two loci, the S-g ene and another, whose expression needs to be investigated.