Screening common bean germplasm for resistance to genetically diverse Sclerotinia sclerotiorum isolates from Argentina

Screening common bean germplasm for resistance to genetically diverse Sclerotinia sclerotiorum isolates from Argentina

White mold caused by Sclerotinia sclerotiorum (Lib.) de Bary is a devastating disease that affects the common bean (Phaseolus vulgaris. L) crop worldwide. In Argentina, white mold has been detected in all bean production areas, reaching seed yield and quality losses up to 100% on susceptible common...

Full description

Saved in:
Bibliographic Details
Published in:Acta scientiarum. Agronomy Vol. 42; p. e42786
Main Authors: Abán, Carla Luciana, Taboada, Gisel Maria, Casalderrey, Norma Beatriz, Maggio, Maria Elisa, Chocobar, Mario Osvaldo, Spedaletti, Yamila Andrea, Gonzalez, Mónica Alicia Aparicio, Vizgarra, Oscar Vicéforo, Galván, Marta Zulema
Format: Journal Article
Language:English
Published: Maringa Editora da Universidade Estadual de Maringá - EDUEM 01-01-2020
Eduem (Editora da Universidade Estadual de Maringá)
Subjects:
AGRONOMY
Beans
Cultivars
disease resistance
Genotypes
Germplasm
Inoculation
Mold
Phaseolus vulgaris
Plant breeding
Plant diseases
Sclerotinia sclerotiorum
Signs and symptoms
Straw
straw test
Weather
White mold
Argentina
disease resistance
Phaseolus vulgaris
straw test
white mold
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:White mold caused by Sclerotinia sclerotiorum (Lib.) de Bary is a devastating disease that affects the common bean (Phaseolus vulgaris. L) crop worldwide. In Argentina, white mold has been detected in all bean production areas, reaching seed yield and quality losses up to 100% on susceptible common bean cultivars under favorable weather conditions. The aim of this study was to screen the physiological resistance of 20 common bean accessions to five genetically distinct isolates of S. sclerotiorum collected from the main common bean growing area of Argentina, using the greenhouse straw test. The white mold reaction was scored at 7, 14, and 21 days post-inoculation using a 1 (no disease symptoms) to 9 (severely diseased or dead plants) scale and the area under the disease progress curve (AUDPC) was determined. Highly significant differences (p < 0.001) were observed between isolates, accessions and genotype x isolate interaction at the three evaluations dates. All cultivars and lines were susceptible at the end of the assessment, except line A 195 which was resistant to white mold against the five isolates tested and was significantly different from all accessions. This work represents a valuable contribution to regional breeding programmes aimed to obtain cultivars with durable resistance.
ISSN:1679-9275
1807-8621
1807-8621
DOI:10.4025/actasciagron.v42i1.42786