Genetic gains in Passiflora for resistance to cowpea aphid-borne mosaic virus using recurrent selection

Genetic gain in Passiflora seed traits from recurrent selection among full-sib families

“…The sample to evaluate physical and physiological quality consisted of a seed mixture from fruits of nine plants of each FSF and was obtained from an experiment in the UENF passion fruit breeding program for resistance to CABMV (Mendes et al 2022). It consisted of FSF from the first cycle of recurrent selection and two controls (Passiflora edulis: cultivar UENF Rio Dourado (Viana et al 2016); and the wild species Passiflora setacea: with the CABMV resistance allele).…”

“…It consisted of FSF from the first cycle of recurrent selection and two controls (Passiflora edulis: cultivar UENF Rio Dourado (Viana et al 2016); and the wild species Passiflora setacea: with the CABMV resistance allele). The field trial, at the Antônio Sarlo State College of Agriculture (lat 21º 42' 48'' S, long 41º 20' 38'' W, alt 14 m asl) in Campos dos Goytacazes, northern region of the state of Rio de Janeiro, Brazil, was laid out in a randomized block design with three replications and three plants per plot (Mendes et al 2022).…”

“…For genotypic correlation analysis, in addition to the seed traits, four fruit variables (fruit weight, length and diameter and pulp weight) were measured and the area under the mean disease progress curve (AUDPCM) for CABMV resistance was estimated. Data of fruit and AUDPCM were recorded in the evaluations of fruits and leaves of nine plants per genotype, as proposed by Mendes et al (2022).…”

“…Parallel to breeding for agronomic traits at UENF, recurrent selection studies were initiated for resistance to cowpea aphid-borne mosaic virus (CABMV) (Preisigke et al 2020, Mendes et al 2022. Resistance genes to CABMV were incorporated from the interspecific cross between cv.…”

Integrating the Classical and Molecular Approaches Toward Passion Fruit Resistance Against CABMV

“…Ranking of the 30 genotypes with the lowest estimates for additive genetic value, genetic gains, and new predicted means, estimated via REML/BLUP, in passion fruit genotypes from the third backcross generation, for the mean area under the disease progress curve (AUDPC M ).Phenotypic value: intensity of damage to the plant caused by CABMV at the end of the evaluations; New mean: expected mean of the next generation regarding the intensity of damage to the plant caused by CABMV; AUDPCM: mean area under the disease progress curve .AUDPC M quanti es the numerical interaction between disease proportion and time, enabling the assessment of disease severity over time. Thus, a lower AUDPC M value is indicative of greater resistance in an individual(Mendes et al 2022). The ranking for AUDPC M was therefore organized in ascending order based on the values of predicted additive genetic effects and gains.…”