Methodological approaches to assess passion fruit resistance (Passiflora spp.) to passionfruit woodiness disease

Authors

  • Zanon Santana Gonçalves Universidade Federal do Recôncavo da Bahia
  • Onildo Nunes de Jesus Embrapa Mandioca e Fruticultura, Cruz das Almas
  • Carlos Bernard Moreno Cerqueira-Silva Universidade Estadual do Sudoeste da Bahia
  • Rafael Parreira Diniz Universidade Federal do Recôncavo da Bahia
  • Taliane Leila Soares Embrapa Mandioca e Fruticultura, Cruz das Almas
  • Eder Jorge de Oliveira Embrapa Mandioca e Fruticultura, Cruz das Almas

DOI:

https://doi.org/10.14393/BJ-v33n6a2017-36619

Keywords:

Passifloraceae, Temporal dynamics, Disease progress, Viruses.

Abstract

The passion fruit woodiness disease, induced by Cowpea aphid borne mosaic virus (CABMV), is considered the most economically important factor limiting passion fruit production in many countries. This study aimed to assess the progression of symptoms caused by CABMV in different Passiflora species. Eighty genotypes belonging 12 species were evaluated in experiments carried out in a completely randomized block design with treatments arranged in a factorial scheme (80 genotypes x 7 evaluation intervals) considering each inoculated plant as a repetition. The disease severity was estimated by the disease index (DI). The evaluations were performed at 20, 27, 34, 41, 48, 55 and 62 days after inoculation (DAI). The average DI values were used to describe the disease progress at each evaluation interval. The shortest time from evaluation to stabilization of CABMV progress was considered to cluster the genotypes by the Scott-Knott test (p≤0.05) and to classify the genotypes as resistant (R), moderately resistant (MR), moderately susceptible (MS), susceptible (S) or highly susceptible (HS). The mean severity gradually increased in the intervals from 20 to 55 DAI and reached a maximum at 62 DAI. The five classes (R, MR, MS, S and HS) contained about 19, 24, 36, 10 and 11% of the germplasm accessions, respectively. The disease temporal progress was quite variable within and among groups, although no difference in DI was observed in the genotypes after 55 DAI, indicating genotype symptom stabilization at this time, regardless of the genotype resistance level.

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Published

2017-11-09

How to Cite

GONÇALVES, Z.S., JESUS, O.N. de, CERQUEIRA-SILVA, C.B.M., DINIZ, R.P., SOARES, T.L. and OLIVEIRA, E.J. de, 2017. Methodological approaches to assess passion fruit resistance (Passiflora spp.) to passionfruit woodiness disease . Bioscience Journal [online], vol. 33, no. 6, pp. 1441–1451. [Accessed20 May 2022]. DOI 10.14393/BJ-v33n6a2017-36619. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/36619.

Issue

Section

Agricultural Sciences