Jahoor, Ahmed
- Department of Plant Breeding, Swedish University of Agricultural Sciences
- Nordic Seed A/S
Abstract
Fungal diseases are a major constraint for wheat production. Effective disease resistance is essential for ensuring a high production quality and yield. One of the most severe fungal diseases of wheat is Septoria tritici blotch (STB), which influences wheat production across the world. In this study, genomewide association mapping was used to identify new chromosomal regions on the wheat genome conferring effective resistance towards STB. A winter wheat population of 164 North European varieties and breeding lines was genotyped with 15K single nucleotide polymorphism (SNP) wheat array. The varieties were evaluated for STB in field trials at three locations in Denmark and across 3years. The association analysis revealed four quantitative trait loci, on chromosomes 1B, 2A, 5D and 7A, highly associated with STB resistance. By comparing varieties containing several quantitative trait loci (QTL) with varieties containing none of the found QTL, a significant difference was found in the mean disease score. This indicates that an effective resistance can be obtained by pyramiding several QTL.
Keywords
association mapping; disease resistance; field trials; genome-wide association study; quantitative trait loci; Septoria tritici blotch; winter wheat
Published in
Plant Breeding
2017, volume: 136, number: 4, pages: 474-482
SLU Authors
Associated SLU-program
SLU Plant Protection Network
AMR: Fungus
UKÄ Subject classification
Agricultural Science
Genetics and Breeding in Agricultural Sciences
Publication identifier
- DOI: https://doi.org/10.1111/pbr.12490
Permanent link to this page (URI)
https://res.slu.se/id/publ/87098