Banca de DEFESA: CRISTINE DA COSTA DINIZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CRISTINE DA COSTA DINIZ
DATA : 12/02/2026
HORA: 08:00
LOCAL: Sala da Pós Graduação -
TÍTULO:

INNOVATION IN PASSION FRUIT CULTIVATION: AGRONOMIC PERFORMANCE OF THE UNEMAT124 HYBRID AS ROOTSTOCK AND ITS RESISTANCE TO SOILBORNE PATHOGENS

PALAVRAS-CHAVES:

Passiflora edulis, Grafting, Fusarium wilt, Collar rot, New cultivar.

PÁGINAS: 79
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

Sour passion fruit (Passiflora edulis) accounts for approximately 95% of the national passion fruit production in Brazil. However, it is highly vulnerable to soilborne pathogens, especially species of the Fusarium spp. complex, which cause collar rot and fusarium wilt. These soil-transmitted diseases compromise both yield and fruit quality. The introgression of resistance genes from wild species of the genus Passiflora, combined with the use of grafting, represents an effective strategy to sustain production in areas affected by these diseases. The present study was structured into two complementary chapters. In Chapter 1, the objective was to evaluate the morpho-agronomic traits and productive performance of the interspecific hybrid (IH) UNEMAT124, aiming at its potential release as a new rootstock cultivar for passion fruit, considering that its resistance to collar rot had already been demonstrated in previous studies. Thus, the trial was conducted in the experimental area of the Plant Breeding Laboratory (LMGV) at the State University of Mato Grosso (UNEMAT), Cáceres campus. The IH UNEMAT124 was used as rootstock, and cutting and grafting techniques (full cleft grafting) were adopted, using P. edulis cv. BRS Sol do Cerrado as the scion. For morpho-agronomic evaluation, 28 descriptors for P. edulis and 35 for interspecific hybrids were used, as recommended by the Ministry of Agriculture and Livestock (MAPA). The experimental design was a randomized complete block design with five blocks, four treatments (TR1 – IH grafted with P. edulis obtained from seed; TR2 – IH grafted with P. edulis obtained from cuttings; TR3 – P. edulis obtained from seed; TR4 – P. edulis obtained from cuttings), and three plants per plot. Evaluations were carried out on adult plants during the first production year. Data were subjected to analysis of variance (ANOVA), and treatment means were compared using Tukey’s test at a 5% probability level. The IH UNEMAT124 was efficient as a rootstock when combined with seed-derived scions and showed superior agronomic performance compared to propagation by cuttings. In addition, it exhibited stable morphological descriptors and high soluble solids content (>16 °Brix). In Chapter 2, the resistance of the IH to fusarium wilt was evaluated through inoculation with Fusarium oxysporum f. sp. passiflorae, aiming to validate the use of IH UNEMAT124 as a sustainable strategy for managing soilborne pathogens, with potential application in commercial orchards in Mato Grosso and, in the future, in other regions of Brazil. Seedlings of IH UNEMAT124 and BRS Sol do Cerrado (control) were produced by cuttings and subjected to two inoculation methods: washed roots (1) and transplanting into substrate after inoculation (2) (1 × 10⁶ conidia mL⁻¹). The experiment was conducted in a greenhouse at the LMGV using a randomized block design in a factorial arrangement of 2 (genotypes) × 2 (inoculated and non-inoculated) × 2 (inoculation methods). Plant survival was evaluated up to 30 days after inoculation. Data were subjected to analysis of variance and Tukey’s test (p < 0.05). The results showed that IH UNEMAT124 had a longer mean survival period (26.56 days) compared to P. edulis (22.54 days), indicating greater tolerance to the disease. The washed-root method was more efficient in promoting infection, resulting in lower survival of inoculated plants. In summary, the results demonstrate the potential of the interspecific hybrid UNEMAT124 as a promising rootstock for passion fruit cultivation, as it combines satisfactory agronomic performance, previously proven resistance to collar rot, and greater tolerance to fusarium wilt, representing a sustainable and technically viable alternative for the management of soilborne pathogens and for maintaining productivity in disease-affected areas.

MEMBROS DA BANCA:
Presidente - 130513001 - SABRINA CASSARO
Interno - 326534002 - ANTONIO MARCOS CHIMELLO
Interna - 132048001 - LEONARDA GRILLO NEVES
Externo ao Programa - 672308001 - ANTONIO ANDRE DA SILVA ALENCAR
Externa ao Programa - 301272001 - GILCIANNY PIGNATA CAVALCANTE