Genomewide association study reveals novel quantitative trait loci associated with resistance towards Septoria tritici blotch in North European winter wheat

Sammanfattning

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.

Nyckelord

association mapping; disease resistance; field trials; genome-wide association study; quantitative trait loci; Septoria tritici blotch; winter wheat

Publicerad i

Plant Breeding
2017, volym: 136, nummer: 4, sidor: 474-482

SLU författare

• Jahoor, Ahmed

  • Institutionen för växtförädling, Sveriges lantbruksuniversitet
    
  • Nordic Seed A/S

Associerade SLU-program

SLU Nätverk växtskydd
AMR: Svampar

UKÄ forskningsämne

Jordbruksvetenskap
Genetik och förädling inom lantbruksvetenskap

Publikationens identifierare

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

Permanent länk till denna sida (URI)

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