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

• Jahoor, Ahmed

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    
  • Nordic Seed A/S

Associated SLU-program

SLU Plant Protection Network
AMR: Fungus


UKÄ Subject classification

Agricultural Science
Genetics and Breeding


Publication identifier

DOI: https://doi.org/10.1111/pbr.12490

Permanent link to this page (URI)

https://res.slu.se/id/publ/87098