Banca de DEFESA: THAYNNARA PAULA DOS SANTOS LIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : THAYNNARA PAULA DOS SANTOS LIRA
DATE: 18/08/2023
TIME: 09:00
LOCAL: Clinica de fitossanidade
TITLE:

PROSPECTING RESISTANCE TO Colletotrichum truncatum IN THE GENETIC DIVERSITY OF THE CREOLE VARIETY OF Phaseolus lunatus

KEY WORDS:

Fava bean; Ethnovarieties; Anthracnose; Genetic resistance.

PAGES: 65
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Fitopatologia
SUMMARY:

The cultivation of Fava bean (Phaseolus lunatus L.) is typically conducted by family farmers and represents a crop of significant economic value in the Northeast region. However, substantial losses in the crop have been common due to the action of phytopathogenic fungi. Fungi of the Colletotrichum genus cause anthracnose, a disease that affects various plant species, including Fava bean. Genetic resistance presents itself as a sustainable and low-cost alternative for disease control. However, there is a need to identify sources of resistance and characterize them in order to perform crosses and develop new varieties. The research aimed to identify the ethnovarieties of Fava bean present in the municipality of São Sebastião/AL, ascertain whether the producers possess ancestral knowledge and emotional connections with the cultivated varieties, and evaluate resistance to anthracnose using the Colletotrichum truncatum (ICT12) isolate. Predefined questionnaires were used to interview Fava bean producers in the region to record cultivation conditions and the history of collected materials. Thirty-seven seed samples were acquired, identified, and stored at the Phytopathological Clinic of the Campus of Engineering and Agricultural Sciences (CECA) of UFAL. The varieties were subjected to pathogenicity tests in a controlled environment and on detached leaves through inoculation of the isolate on the upper surface of the leaves. Among the interviewed producers, the majority (45.4%) had over 30 years of cultivation experience. Additionally, 63.3% stated that they obtained the seeds from their ancestors. Regarding cultivation practices, 54.4% of the producers usually intercrop Fava beans with corn and store the seeds in plastic bottles (PET). The use of fertilizer is the primary management method for 90.9% of the respondents. Agriculture is the sole source of income for 81.8% of them, and they do not require assistance in cultivating Fava beans. In terms of consumption and commercialization, 63.6% of the producers stated that they consume the Fava beans they produce, while 36.3% not only consume but also sell them. In the in vivo and in vitro evaluations, the PLI and PLGB varieties showed high resistance, while the PLLS5 variety demonstrated high susceptibility. The producers possess ancestral knowledge and emotional connections with the cultivated varieties of Fava bean, which show great promise for studies on genetic resistance to pathogens.

BANKING MEMBERS:
Presidente - 1790557 - GILDEMBERG AMORIM LEAL JUNIOR
Interno(a) - 2149632 - SARAH JACQUELINE CAVALCANTI DA SILVA
Externo(a) ao Programa - 1121083 - MARIA DE FATIMA SILVA MUNIZ