Banca de QUALIFICAÇÃO: Eulla Ghrislaine Fialho De Morais

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : Eulla Ghrislaine Fialho De Morais
DATA : 31/08/2026
HORA: 14:00
LOCAL: Cáceres
TÍTULO:

Reaction of Tectona grandis clones to Ceratocystis fimbriata.

PALAVRAS-CHAVES:

pathogen tolerance; vascular diseases; plant breeding; forest pathosystem; plant defense.

PÁGINAS: 31
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

Tectona grandis L.f. is a forest species of high economic value, widely cultivated in tropical regions, especially in the state of Mato Grosso, Brazil. However, the expansion of commercial plantations has favored the occurrence of sanitary problems, including vascular wilt caused by Ceratocystis fimbriata, a disease capable of compromising plant development and wood quality. Due to the difficulty of controlling the disease after the pathogen becomes established in vascular tissues, the identification of less susceptible genotypes represents an important strategy for teak breeding programs. In this context, the objective of this study was to evaluate the reaction of clonal genotypes of Tectona grandis to infection by Ceratocystis fimbriata. The experiment was carried out in a greenhouse at the experimental area of the Laboratory of Agriculture, Genetic Resources & Biotechnology of the State University of Mato Grosso, in Cáceres, Mato Grosso, Brazil. Thirty-four clonal teak genotypes were evaluated in a randomized block design, with three replications, totaling 102 experimental plots and 306 seedlings. The C. fimbriata isolate was obtained from a commercial teak production area belonging to Proteca, located in the municipality of São José dos Quatro Marcos, Mato Grosso, from trees showing typical symptoms of Ceratocystis wilt. Isolation was performed directly from ascospores, which were transferred to Petri dishes containing Potato Dextrose Agar (PDA) medium and maintained in a BOD incubator at 25 °C under an alternating 12-hour photoperiod. Inoculation was performed 120 days after transplanting using a spore suspension adjusted to 2.5 × 10⁵ spores mL⁻¹, applied to a transverse cut on the plant stem, with the deposition of 20 µL of the suspension per plant. At 120 days after inoculation, a destructive evaluation was performed, exposing the internal stem lesions and measuring lesion length, width, and injured area. The data obtained were subjected to analysis of variance, and treatment means were compared by Tukey’s test at 5% significance using the Genes software.

MEMBROS DA BANCA:
Presidente - 101376004 - MARCO ANTONIO APARECIDO BARELLI
Externo ao Programa - 131944001 - LUIZ FERNANDO CALDEIRA RIBEIRO
Externa à Instituição - SANDRA DA COSTA PREISIGKE - UENF