Agronomic characterization and genetic parameter estimation in yellow passion fruit

Abstract

The selection of yellow passion fruit (Passiflora edulis Sims) genotypes with high yield and fruit quality is essential for the development of passion fruit crop in the country. Therefore, the objective of this study was to evaluate the agronomic performance and estimate the genetic parameters of 32 yellow passion fruit genotypes cultivated in the Federal District, Brazil. The experiment consisted of randomized block design with 32 treatments, eight plants per plot, and four replications. Fruits were classified based on their equatorial diameter. Yield, number of fruits per hectare, and fruit weight were evaluated. Genotypes MAR20#23 and UnB-P7 presented the highest total yield, and MAR20#23 also showed the greatest total number of fruits per hectare. BRS GA1 and MAR20#23 had the best performance for industrial purposes dues to the fruits of smaller diameter classes. UnB-P7, AR-01, and MSC were more indicated for in natura consumption owing to the fruits of greater diameter classes. The high magnitude estimates for heritability and genetic variation coefficients indicate the possibility of greater genetic gains with direct selection for yield and number of fruits of 1C diameter class. Significant phenotypic correlations were observed, indicating the possibility of indirect selection for number of fruits, fruit weight, and yield.

Agronomic assessment of 32 sour passionfruit genotypes in federal district

“…Negative and significant phenotypic correlation values were observed between the number of 1A fruits and the average mass of 1A (rf = -0.60); average 1B fruit mass and estimated productivity, number of fruits and average fruit mass of 3A classification (rf = -0.5; rf = -0.53; and rf = -0.37, respectively). Similar results were observed in works (Silva et al 2015;Moreira et al 2018).…”

“…Similar results were found by Moreira et al (2018), who observed a heritability of 65% and CVg/CVe value of 0.69 for total yield, with 32 genotypes and 20 harvest. Viana et al (2017), working with 95 sour passion fruit progenies, obtained heritability values and CVg/CVe ratio for estimated productivity of 63.01%.…”

“…Similar results were found by Santos et al (2017) and Moreira et al (2018). Pimentel et al (2008) affirm that these results favor the breeder's decision making, since when they select for plants with a higher number of fruits, it occurs indirectly selection for greater productivity.…”

“…In fruits classified as 3A, the highest average mass value was observed in the MSC genotype with 170g (Table 3). Moreira et al (2018) observed similar results, with, first class average fruit mass ranging from 38 g in EC-RAM to 71 g in MAR20#15 and for the fruits classified as 3A, the MSC genotype also presented higher average mass, with 168g. Cavalcante et al (2016) obtained average fruit mass values in the order of 256.91g for the BRS Gigante Amarelo genotype, the highest average fruit mass achieved in his research.…”