Identification of passion fruit genotypes resistant to Fusarium oxysporum f. sp. passiflorae

Abstract

This study aimed to characterize the resistance of 31 passion fruit (Passiflora sp.) genotypes to Fusarium oxysporum f. sp. passiflorae (FOP). About 20 seedlings of each genotype were inoculated by immersing the roots in a suspension of 10 6 macroconidia mL -1 for five minutes and then transplanting them into pots containing a mixture of soil and sterile substrate. They were evaluated daily for 120 days for the occurrence of wilt symptoms and death. These data were used to calculate the area under the disease progress curve, for survival analysis and grouping. The mortality rate ranged from 0 to 100% and the AUDPC ranged from 0 for genotypes without symptoms of the disease to 6,650.63 for the hybrid HFOP-01. Genotypes were classified into four subgroups: resistant, moderately resistant, susceptible and highly susceptible. The resistance was genotype dependent, but no significant variation was found between the purple and the yellow P. edulis.

Characterization and selection of passion fruit (yellow and purple) accessions based on molecular markers and disease reactions for use in breeding programs

“…Descriptions of the reactions of P. edulis (yellow and purple shell) to different pathogens are available in the literature and indicate the existence of both variability available for selection in collections and accessions maintained in germplasm banks Silva et al 2013;Cerqueira-Silva et al 2008;Junqueira et al 2006) and low disease resistance or tolerance in passion fruit cultivars (Batistti et al 2013;Fischer et al 2010;Junqueira et al 2003).…”

“…Records in the literature indicate the occurrence of numerous pathogens associated with passion fruit crops. Discussions of advances and perspectives related to the primary diseases that affect passion fruit cultivation (such as fusariosis, scab, anthracnose, bacteriosis, and woodiness virus) are also available in the literature (Cerqueira- Silva et al 2014a;Silva et al 2013;Faleiro et al 2011;Meletti et al 2005;Faleiro et al 2005).…”

“…To identify sources of resistance to diseases, we highlight studies addressing the characterization of passion fruit varieties and cultivars (Batistti et al 2013;Fischer et al 2010;Junqueira et al 2003), as well as accessions maintained in collections and germplasm banks Silva et al 2013;Cerqueira-Silva et al 2008;Junqueira et al 2006). In general, the results presented in the published literature vary, indicating the differing susceptibilitiesof the evaluated cultivars and the broad genetic variability of the specimens in germplasm banks, for both P. edulis and wild passion fruit species.…”

Effect of two wild rootstocks of genus Passiflora L. on the content of antioxidants and fruit quality of yellow passion fruit

“…to premature death of the plants (Fusarium spp.) was reported by Silva et al (2013). Thus, there have been several studies, as those reported by Cavichioli et al (2011) and Salazar et al (2015), evaluating the effect of rootstock and graft type on fruit quality of yellow passionfruit, finding that the rootstocks (P. edulis, P. alata, P. mucronata and P. gibertii) did not influence the content of soluble solids (SS), titratable acidity (TA) and the SS/TA ratios.…”

VARIABILIDADE GENÉTICA DE ISOLADOS DE Fusarium solani e Fusarium oxysporum f. sp.passiflorae ASSOCIADOS AO MARACUJAZEIRO

“…a estratégia mais segura para o controle destas doenças é a utilização de cultivares ou de porta-enxerto resistentes a estes patógenos. a seleção de genótipos dentro da espécie Passiflora edulis Simmonds tem sido relatada em diversos trabalhos (SILVA et al, 2013a). Entretanto, há uma grande variabilidade dentro do gênero Passiflora quando se estuda sua resposta à infecção por Fusarium spp.…”