Screening of Sour Passion Fruit for Reaction to Bacterial Spot and Passion Fruit Woodiness Disease

Abstract

The development of resistant varieties is a promising strategy for bacterial spot disease (Xanthomonas axonopodis pv. passiflorae-Xap) and passion fruit woodiness disease (PWD; Cowpea aphid-borne mosaic virus-CABMV) control in sour passion fruit (Passiflora edulis Sims). This study aimed at evaluating the reaction of 12 sour passion fruit half-sib progenies to both mechanically inoculated Xap and CABMV, under protected cultivation. The bacterial spot and PWD severity degrees observed reveal the existence of variability within progenies. MAR20#2005 and BRS GA1 revealed the lowest bacterial disease severity scores while MAR20#41, MAR20#2005, and Rosa Intenso 1 showed the lowest PWD severity scores. MAR20#41 presented the lowest disease incidence in all evaluations, demonstrating a slow increase in the number of plants with symptoms over time. Also, MAR20#41 stood out as the progeny with the greatest number of plants presenting resistance to PWD at the end of the study. Among the progenies selected, MAR20#2005 was the most promising for presenting the lowest severity scores for both bacterial spot and PWD.

Reaction of Sour Passion Fruit Lineages and Hybrids to Bacterial Spot Caused by Xanthomonas axononopodis pv. passiflorae Under Protected Cultivation and Field Conditions

“…Furthermore, Costa et al (2018), andBlum (2020) recorded the lowest severity scores for the cultivar BRS Gigante Amarelo in studies performed with different varieties. Unlikely, in the present study, BRS Gigante Amarelo had the highest severity scores, assuming greater resistance gain when comparing hybrids and selected lineages with varieties.…”

“…As a consequence, social and economic losses are observed since the curative control of diseases is costly and often not satisfactory (Miranda, 2004;Laranjeira, 2005). Since passion fruit presents considerable genetic variability, several breeding programs are focused on obtaining more productive and disease-resistant varieties (Costa et al, 2020).…”

The Passion Fruit in Florida

“…The symptoms include defoliation, distorted leaves with mosaic or mottling patterns, and hardened (i.e., woody), deformed fruit ( Figure 26). There are no reported resistant genotypes to CABMV infections (Costa et al 2020). Viruses are generally transmitted by aphids but also through infected planting material (e.g., cuttings), and some viruses may be transmitted by seed.…”

El maracuyá en Florida

“…Los síntomas incluyen defoliación, hojas deformadas con patrones de mosaico o moteado, y fruto endurecido (leñoso) y deforme (Figure 26). Por el momento, no se han reportado genotipos resistentes a las infecciones de CABMV (Costa et al 2020). Los virus generalmente son transmitidos por pulgones, pero también a través de material para trasplante infectado (por ejemplo, esquejes), y algunos pueden ser transmitidos incluso por semillas.…”