Historic recombination in a durum wheat breeding panel enables high-resolution mapping of Fusarium head blight resistance quantitative trait loci.
Chromosome Mapping
Disease Resistance
/ genetics
Fusarium
Genetic Association Studies
Genetic Predisposition to Disease
Genome-Wide Association Study
Host-Pathogen Interactions
/ genetics
Linkage Disequilibrium
Plant Breeding
Plant Diseases
/ genetics
Quantitative Trait Loci
Quantitative Trait, Heritable
Recombination, Genetic
Selection, Genetic
Triticum
/ genetics
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
05 05 2020
05 05 2020
Historique:
received:
20
01
2020
accepted:
15
04
2020
entrez:
7
5
2020
pubmed:
7
5
2020
medline:
1
12
2020
Statut:
epublish
Résumé
The durum wheat line DT696 is a source of moderate Fusarium head blight (FHB) resistance. Previous analysis using a bi-parental population identified two FHB resistance quantitative trait loci (QTL) on chromosome 5A: 5A1 was co-located with a plant height QTL, and 5A2 with a major maturity QTL. A Genome-Wide Association Study (GWAS) of DT696 derivative lines from 72 crosses based on multi-environment FHB resistance, plant height, and maturity phenotypic data was conducted to improve the mapping resolution and further elucidate the genetic relationship of height and maturity with FHB resistance. The Global Tetraploid Wheat Collection (GTWC) was exploited to identify durum wheat lines with DT696 allele and additional recombination events. The 5A2 QTL was confirmed in the derivatives, suggesting the expression stability of the 5A2 QTL in various genetic backgrounds. The GWAS led to an improved mapping resolution rendering the 5A2 interval 10 Mbp shorter than the bi-parental QTL mapping interval. Haplotype analysis using SNPs within the 5A2 QTL applied to the GTWC identified novel haplotypes and recombination breakpoints, which could be exploited for further improvement of the mapping resolution. This study suggested that GWAS of derivative breeding lines is a credible strategy for improving mapping resolution.
Identifiants
pubmed: 32372012
doi: 10.1038/s41598-020-64399-1
pii: 10.1038/s41598-020-64399-1
pmc: PMC7200731
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
7567Références
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