Abstract
Yellow passion fruit (Passiflora edulis Sims) yield and longevity have been drastically reduced by bacterial spot (Xanthomonas axonopodis pv. passiflorae - Xap) and passion fruit woodiness disease (PWD) (Cowpea aphid-borne mosaic virus - CABMV). This study was aimed at evaluating the reaction of 11 genotypes of yellow passion fruit, based on the reaction of their progenies, to both mechanically inoculated Xap and CABMV, under greenhouse conditions. There was a progressive increase in bacterial spot and PWD severity with time. BRS Gigante Amarelo, MAR20#12, and MAR20#34 were selected as the progenies with lowest bacterial spot severity and disease progress over time. MAR20#2005, EC-L-7, UnB2015-1, and EC-3-0 presented the lowest PWD severity and disease progress over time. These progenies, along with individual plants from other progenies in which disease severity was significantly low until the last evaluation, will be cloned and tested again for Xap and CABMV, including other isolates.
Highlights
Brazil is the largest passion fruit producer in the world
The genotypes evaluated were obtained from research studies developed by Embrapa (Empresa Brasileira de Pesquisa Agropecuária – Brazilian Agricultural Research Corporation) and University of Brasília (UnB), which used yield, fruit quality, and disease resistance as selection criteria
Bacterial spot severity assessments identified an interaction between progenies and evaluation dates (P ≤ 0.05)
Summary
Passiflora edulis Sims (yellow passion fruit) stands out as the predominant species, corresponding to 95% of Brazils production (Costa et al 2008), whereas BRS Gigante Amarelo (BRS GA1) is one of the major cultivars planted due to its high fruit and pulp yields, good fruit quality, and disease resistance (Meletti 2011). Based on the productive potential of the species, especially under experimental conditions, Brazilian passion fruit yield (14,101 kg ha-1) is still considered low (Freitas et al 2011). In Brazil, passion fruit is infected by many plant pathogens, which can compromise fruit quality, reduce yield, and shorten the crop’s productive cycle. Passiflorae (Xap), and passion fruit woodiness disease (PWD), caused by Cowpea aphid-borne mosaic virus (CABMV), are of great importance to Brazilian passion fruit production (Carvalho et al 2015) Bacterial spot disease, caused by Xanthomonas axonopodis pv. passiflorae (Xap), and passion fruit woodiness disease (PWD), caused by Cowpea aphid-borne mosaic virus (CABMV), are of great importance to Brazilian passion fruit production (Carvalho et al 2015)
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