Banca de DEFESA: YARA CRISTINA DA SILVA VARELA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : YARA CRISTINA DA SILVA VARELA
DATE: 29/07/2025
TIME: 09:00
LOCAL: sala da Produção Agrícola
TITLE:

Quality and selection of Phaseolus Lunatus seed accessions: conservation of agrobiodiversity and potential for the semiarid region

KEY WORDS:

Family farming; Genetic diversity, Traditional seeds; semi-arid in situ conservation.

PAGES: 65
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Produção e Beneficiamento de Sementes
SUMMARY:

Phaseolus lunatus L., commonly known as lima bean, is a legume of significant socioeconomic and nutritional importance for rural communities in the Brazilian semiarid region, where it is traditionally cultivated by family farmers. The landrace seeds of this species represent a valuable genetic resource, shaped by generations of natural and cultural selection. In this context, the morphological, physiological, and sanitary characterization of these seeds is essential to support conservation strategies and, more importantly, to enhance participatory breeding programs aimed at promoting the sustainability of family farming systems.This study aimed to characterize the physical, morphological, physiological, and sanitary attributes of 18 traditional varieties of P. lunatus cultivated by farmers in the Southern Agreste region of Pernambuco, Brazil. The research was conducted at the Federal University of Agreste de Pernambuco, using seeds collected from 18 agricultural communities across the region. The seeds were initially classified and described based on physical and morphological descriptors and subsequently subjected to germination, vigor, and health assessments (blotter test). Univariate and multivariate statistical analyses revealed considerable genetic variability among the accessions, highlighting their potential for the selection of superior genotypes. A negative correlation was observed between the presence of Cladosporium and key physiological variables such as germination (r = -0.61), first germination count (r = -0.59), and cotyledon dry weight (r = -0.35). Conversely, collar diameter showed a positive correlation with germination speed index (r = 0.51), final germination (r = 0.56), and first count (r = 0.48). Notably, cotyledon dry weight exhibited a strong positive correlation with the germination speed index (r = 0.90), suggesting that vigorous seedlings tend to accumulate more biomass. These findings underscore the potential of traditional landraces as a genetic base for breeding programs and reinforce their role in agroecological systems. The observed genetic diversity serves as a foundation for the development of improved cultivars better adapted to local conditions, contributing to food security and resilience in semiarid farming systems.

COMMITTEE MEMBERS:
Presidente - 1648101 - EDILMA PEREIRA GONCALVES
Externa à Instituição - DEBORA TERESA DA ROCHA GOMES FERREIRA
Externo à Instituição - ANTÔNIO AUGUSTO MARQUES RODRIGUES - UFAPE