Banca de DEFESA: MARIA ISABEL GOMES DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA ISABEL GOMES DOS SANTOS
DATE: 27/02/2023
TIME: 14:00
LOCAL: Prédio da Pós-graduação
TITLE:

RESISTANCE OF YELLOW PASSION FRUIT (Passiflora edulis) GENOTYPES TO ANTHRACNOSE

KEY WORDS:

Genetic resistance; Phytopathology; Mycology; Passiflora; Family agriculture.

PAGES: 71
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Fitopatologia
SUMMARY:

The genus Passiflora (family Passifloraceae) occurs mainly in tropical regions. Brazil is considered the most important center of diversity of the genus and the largest producer of passion fruit. Phytosanitary problems limit the expansion of the crop and the maintenance of crops in the same area for a prolonged period. Anthracnose is one of the fungal diseases that threaten the passion fruit production sector. Caused by fungal species of the genus Colletotrichum spp. and in the passion fruit crop, genetic resistance is the best alternative for disease control. However, there is a need to identify the sources of resistance and characterize the accessions for indication in crosses for the development of new varieties. The research aimed to identify accessions of yellow passion fruit (Passiflora edulis) with resistance to anthracnose in the germplasm bank of EMBRAPA Mandioca e Fruticultura Tropical. Colletotrichum spp. were isolated from plants with symptoms of anthracnose in crops from Alagoas and Bahia. The isolates were evaluated for aggressiveness on passion fruit cultivated by farmers. Four isolates were inoculated into 16 passion fruit accessions. When the plants reached 60 days after germination, with 5 to 6 leaves, they were inoculated with a mycelium disc in a lesion made with a sterilized needle on the adaxial surface. The incidence of anthracnose was determined based on the appearance of the first lesions, measuring the diameter of the lesion, the first reading being taken 2 days after inoculation. The collected data were submitted to analysis of variance (ANOVA), and the averages were compared using the Scott-Knott test, at a 5% significance level, using the SISVAR program. Questionnaires were applied to passion fruit producers in Alagoas, in order to analyze the real situation they face for the production and marketing of passion fruit. It was possible to see that family farming in Alagoas is strong and that passion fruit is a well-regarded product for commercialization. However, for producers, improvements are needed in the context in which they live, such as training courses and education in the field of quality. The Gigante Amarelo and HRI30 P.A genotypes were considered less susceptible and more susceptible, respectively, to anthracnose, taking into account that the Gigante Amarelo is an improved variety released as resistant in the market, being one of the most used by passion fruit producers in Alagoas.

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Interno(a) - 2149632 - SARAH JACQUELINE CAVALCANTI DA SILVA
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