Back-cross reciprocal monosomic analysis of Fusarium head blight resistance in wheat (Triticum aestivum L.)

Fusarium head blight (FHB or scab) caused by Fusarium spp. is a widespread disease of cereals causing yield and quality losses and contaminating cereal products with mycotoxins. The breeding of resistant varieties is the method of choice for controlling the disease. Unfortunately, the genetic basis...

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Bibliographic Details
Published in:Theoretical and applied genetics 1999, Vol.98 (1), p.76-85
Main Authors: Buerstmayr, H, Lemmens, M, Fedak, G, Ruckenbauer, P
Format: Article
Language:English
Subjects:
Agricultural production
backcrossing
blight
Cereals
Chromosomes
contamination
crop damage
Crop diseases
Cultivars
deoxynivalenol
Development and progression
disease resistance
Diseases and pests
Fungal diseases of plants
Fusarium
Fusarium culmorum
gene location
Genetic aspects
Health aspects
Infections
lines
pathogenesis
Physiological aspects
Plant genetics
Plant immunology
seed weight
Seeds
Triticum aestivum
Wheat
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Summary:Fusarium head blight (FHB or scab) caused by Fusarium spp. is a widespread disease of cereals causing yield and quality losses and contaminating cereal products with mycotoxins. The breeding of resistant varieties is the method of choice for controlling the disease. Unfortunately, the genetic basis of scab resistance is still poorly understood. We present the results of a back-cross reciprocal monosomic analysis of FHB resistance using the highly resistant Hungarian winter wheat line 'U-136.1' and the highly susceptible cultivar 'Hobbit-sib'. Resistance testing was performed in a field trial artificially inoculated with a Fusarium culmorum conidial suspension. Five hemizygous families containing 'U-136.1' chromosomes 6B, 5A, 6D, 1B, and 4B had a visually reduced spread of infection compared to lines having the 'Hobbit-sib chromosome. Chromosome 2B from 'U-136.1' had an increased spread of infection. The critical chromosomes controlling seed weight were 6D, 3B, 5A, and 6B while those controlling deoxynivalenol (DON) content were homoeologous groups 2 and 6, although the latter effects were not significant due to a high coefficient of variation. Results from this and other studies show that chromosomes 6D, 6B, 5A, 4D, and 7A have frequently been associated with scab resistance in a number of wheat cultivars. Research groups now attempting to map scab resistance in wheat using markers should pay special attention to the above-mentioned chromosomes.
ISSN:0040-5752
1432-2242
DOI:10.1007/s001220051042