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Identification of novel QTL for resistance to Fusarium head blight in a tetraploid wheat population
- Source :
- Genome. 55(12)
- Publication Year :
- 2012
-
Abstract
- Most tetraploid durum wheat (Triticum turgidum L var. durum) cultivars are susceptible to Fusarium head blight (FHB). This study reports novel quantitative trait loci (QTL) associated with FHB resistance. A backcross recombinant inbred line (BCRIL) population was developed from the cross BGRC3487/2*DT735, and 160 lines were evaluated for resistance to Fusarium graminearum Schwabe (teleomorph Gibberella zeae (Schwein. Petch) in field trials over 3 years (2008–2010) and to a F. graminearum 3-acetyl-deoxynivalenol (3-ADON) chemotype in greenhouse trials. The population was genotyped with 948 polymorphic loci using DArT and microsatellite markers. Eleven QTL were associated with FHB resistance under field conditions on chromosomes 2A, 3B, 5A, 5B, 7A, and 7B. Two of these, QFhb.usw-3B from BGRC3487 and QFhb.usw-7A2, were consistently detected over environments. The QFhb.usw-3B QTL was in a similar position to a resistance QTL in hexaploid wheat. The combination of the two QTL reduced field index by 53.5%–86.2%. Two QTL for resistance to the 3-ADON chemotype were detected on chromosomes 1B and 4B. Both BGRC3487 and DT735 could provide new sources of FHB resistance and the combination of QTL reported here could be valuable tools in breeding FHB-resistant durum wheat.
- Subjects :
- Fusarium
Population
Quantitative Trait Loci
Quantitative trait locus
Genes, Plant
Genetics
Inbreeding
Cultivar
education
Molecular Biology
Genetic Association Studies
Triticum
Disease Resistance
Plant Diseases
education.field_of_study
biology
Chemotype
General Medicine
biology.organism_classification
Physical Chromosome Mapping
Tetraploidy
Gibberella zeae
Agronomy
Backcrossing
Microsatellite
Biotechnology
Microsatellite Repeats
Subjects
Details
- ISSN :
- 14803321
- Volume :
- 55
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Genome
- Accession number :
- edsair.doi.dedup.....fc432fea693914f5d23fb6286a2256c6