Self-incompatibility in passionfruit: evidence of gametophytic-sporophytic control

Abstract

Self-incompatibility in passionfruit was studied in families originated from crosses among plants that presented differences in reciprocal crosses. The three families, obtained by crossing S(3) plants, exhibited one incompatible group; no reciprocal differences were observed. The phenotype of the families was the same as the parent plants, S(3). These results suggest the presence of a gene ( G), gametophytic in its action, associated to the sporophytic gene S, modifying the incompatibility reaction in passionfruit. The reciprocal difference exhibited in the crosses among the parents could be explained as a matching between plants homozygous for S, but homozygous and heterozygous for G. Actually this would be a partially compatible cross, not detectable when the evaluation is done based on fruit set data. As the family originated from this kind of cross is homozygous for S and heterozygous for G, no reciprocal differences are expected, and the phenotype should be the same as the parental plants, as observed in the present work.

Improving yield and fruit quality traits in sweet passion fruit: evidence for genotype by environment interaction and cross-compatibility in selected genotypes

“…We also noticed differences in reciprocal crosses, corroborating other studies on yellow passion fruit (Akamine and Girolami, 1959;do Rêgo et al, 1999;Suassuna et al, 2003). In our study, all the reciprocals of the incompatible crosses (♀21 × ♂107, ♀125 × ♂140 and ♀140 × ♂122) had low rates of fruit production (♀107 × ♂21, ♀140 × ♂125 and ♀122 ×♂140).…”

“…In our study, all the reciprocals of the incompatible crosses (♀21 × ♂107, ♀125 × ♂140 and ♀140 × ♂122) had low rates of fruit production (♀107 × ♂21, ♀140 × ♂125 and ♀122 ×♂140). These results lend weight to the idea that there is genetic control of self-incompatibility in Passiflora, which has already been described as homomorphic sporophytic (Bruckner et al, 1995) and gametophytic-sporophytic (Suassuna et al, 2003).…”

Transcriptome analysis reveals self-incompatibility in the tea plant (Camellia sinensis) might be under gametophytic control

“…LSI is defined based on the location of self-pollen inhibition rather than the molecular mechanism [ 12 ]. LSI can be regulated in different ways, through gametophytic or sporophytic control, either independently or acting together [ 13 , 58 ]. For the pollen tube growth from a self-pollination that was arrested in the ovary, self-incompatibility in C. sinensis was assumed to occur via LSI [ 6 , 23 , 24 ].…”

Estimates of Genetic Parameters and Selection Strategies in F1 Progenies Obtained from Endogamic Lines of Sour Passion Fruit

“…The sour passion fruit is native to Brazil and is widely distributed throughout South and Central America [2]. The species Passiflora edulis Sims is allogamous and autoincompatible [3] and presents high genetic variability, despite its commercial exploitation. Given these characteristics, passion fruit breeding programs have advocated obtaining hybrids and exploring heterosis, which is one of the great challenges to the selection of materials that express their phenotype in the largest possible number of agronomic characters of importance [4,5].…”