Resistance of sunflower (Helianthus annuus L.) to terminal bud attack by Sclerotinia sclerotiorum (Lib.) de Bary

Resistance of sunflowers to terminal bud attack by Sclerotinia sclerotiorum was studied by microscopical observations of infection processes and by genetical analyses of trials showing natural infections. Electron microscope studies showed that there were no differences in leaf morphology between su...

Full description

Saved in:
Bibliographic Details
Published in:European journal of plant pathology 1996, Vol.102 (5), p.421-429
Main Authors: Achbani, E.H, Tourvieille de Labrouhe, D, Vear, F
Format: Article
Language:English
Subjects:
additive genes
Agronomy. Soil science and plant productions
Biological and medical sciences
disease resistance
Fundamental and applied biological sciences. Psychology
genes
genetic resistance
Genetics and breeding of economic plants
genotype
Helianthus annuus
inbred lines
infection
inheritance (genetics)
Life Sciences
Pest resistance
Plant pathogens
Sclerotinia sclerotiorum
spore germination
varietal resistance
Varietal selection. Specialized plant breeding, plant breeding aims
Vegetal Biology
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Resistance of sunflowers to terminal bud attack by Sclerotinia sclerotiorum was studied by microscopical observations of infection processes and by genetical analyses of trials showing natural infections. Electron microscope studies showed that there were no differences in leaf morphology between susceptible and resistant genotypes, and that both were contaminated by ascospores. Only on the susceptible genotype was considerable ascospore germination observed, followed by mycelial development and leaf penetration. On the resistant genotype, there was little ascospore germination and no further development. The genetical studies of percentage natural attack observed on eight inbred lines representing a range of reactions, and the hybrids from a factorial cross of these lines, indicated that inheritance is mainly additive, with few interactions.
ISSN:0929-1873
1573-8469
DOI:10.1007/BF01877136