Banca de DEFESA: HEITOR ANTONIO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : HEITOR ANTONIO DA SILVA
DATA : 28/02/2022
HORA: 14:00
LOCAL: Campus Jane Vanini, Bloco I, Cáceres MT
TÍTULO:

GENETIC PARAMETERS OF COMMON BEAN RESISTANCE TO THE PHYTOPATHOGEN CAUSING WHITE MOLD

PALAVRAS-CHAVES:

Phaseoulus vulgaris L.; Sclerotinia sclerotiorum Lib. de Bary; teste do canudo em plântulas.

PÁGINAS: 60
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Melhoramento Vegetal
RESUMO:

Common bean (Phaseolus vulgaris L.) is a legume with great importance in human food for all social classes, especially for the poorest, due to its low cost and great nutritional qualities and great economic and social importance, being its cultivation affected by several biotic and abiotic factors that reduce productivity and make the product more expensive for the final consumer. Among the main pathogens, Sclerotinia sclerotiorum Lib. de (Bary), the phytopathogen that causes white mold, stands out for its wide dissemination, potential damage to crops and resistance structures. This work aimed to determine the genetic factors that make up the physiological resistance of common bean to the phytopathogen that causes white mold. Crosses between common bean genotypes BGF 13 X BGF 89, BGF 20 X PI 207262 and BGF 20 X BRS FC 402, contrasting in terms of resistance to white mold previously selected and from different gene pools, were obtained, obtaining the generation F1 and F2 segregating generation. The resulting plants in F2 were inoculated with an isolate of the phytopathogen that causes white mold by the “seedling straw test” method (seedling straw test) and the variables noted at day 5, Area Below the Disease Progress Curve (AACPD) and Plant Disease Ratio (RDP) were used to determine environmental variance, genotypic variance, phenotypic variance, broad-sense heritability and number of genes through the joint scale test performed in the genes statistical software. The environmental variance represented, in general, a large part of the phenotypic variance, indicating that the characteristic white mold resistance is moderate to highly influenced by the environment, in agreement with what has already been reported in previous studies. The genotypic variance was expressive only for the variable RDP in the crosses between BGF 13 X BGF 89 and BGF 20 X PI 207262, moderately expressive for the variable Grade at 5th day and AACPD for the BGF 20 X PI 207262. The segregating generation F2 presented individuals with resistance and susceptible, indicating the efficiency of determination of resistant individuals by the straw method in seedlings and the polygenic nature of resistance to white mold. Broad sense heritability was moderate to high for white mold resistance. The estimate indicated the number equal to or greater than 2 genes in the expression of resistance to white mold, indicating the action of polygenes in the determination of resistance to white mold.

MEMBROS DA BANCA:
Presidente - 285519001 - THIAGO ALEXANDRE SANTANA GILIO
Interno - 239934003 - KELLY LANA ARAUJO
Externo à Instituição - RAFHAEL FELIPIN AZEVEDO - UEM