Evaluation and selection of passion fruit progenies resistant to collar rot disease

• Published in: Australian Journal of Crop Science Vol. 17; no. 3; pp. 254 - 262
• Main Authors: Chimello, Antonio Marcos, Silva, Gabriel Vinicius Batista da, Aguiar, João Gabriel Belém de, Marostega, Thalita Neves, Preisigke, Sandra da Costa, Gilio, Thiago Alexandre Santana, Araújo, Kelly Lana, Neves, Leonarda Grillo
• Format: Journal Article
• Language: English
• Published: Lismore, N.S.W Southern Cross Publishers 03.03.2023
• Subjects: Cerrados; Fusarium solani; Growth; Passion fruit; Seedlings
• ISSN: 1835-2693; 1835-2707
• DOI: 10.21475/ajcs.23.17.03.p3651

The objective of this work is to evaluate and select backcrosses of passion fruit progenies resistant to soil diseases. This selection contributes to the improvement of the passion fruit genetic improvement program. A cross of the interspecific hybrid UNEMAT 124-3 resistant to 'Fusarium solani' was carried out. The hybrid arose from crossing the resistant species 'P. nitida' with a commercial cultivar of 'P. edulis'. 'P. edulis', cultivar BRS Sol do Cerrado, was a recurrent parent. The BC1 resistance tests were evaluated twice. The first test was carried out with BC1 adducts that are in the field; for this, clone seedlings were produced from cuttings of each plant for the resistance test. The second test comprised inoculation directly into BC1s that were planted in pots without replications. In addition, clones of 'P. nitida' and HI were used as a positive (resistant) control and clonal seedlings of 'P. edulis' as a negative (susceptible) control. The evaluation of resistance of the genotypes to 'F. solani' was quantified considering ten resistance variables. In the first trial with plants from cuttings, it was possible to identify the BC1s 02, 14, and 24 as resistant to 'F. solani'. In the second trial with 'Passiflora' spp. seedlings, considering the results of UPGMA, hierarchical methods of torch optimization and graphical dispersion per genotype considering the importance of characters, it was possible to identify the BC1s 25, 26, 27, 28, 31, 43, 45, 48, 53, 57, 58, 61, 63, 66, 68, 71, 72, 73, 74, 80, 81, 83, 84, 86, and 87 as resistant. These should be selected to continue the passion fruit improvement program.