Genetic Analysis Using a Multi-Parent Wheat Population Identifies Novel Sources of Septoria Tritici Blotch Resistance
Author
Riaz, Adnan
KockAppelgren, Petra
Hehir, James Gerard
Kang, Jie

Meade, Fergus

Cockram, James

Milbourne, Dan

Spink, John
Mullins, Ewen

Byrne, Stephen

Keyword
wheatMAGIC population
septoria tritici blotch
genetic disease resistance
quantitative trait locus (QTL) mapping
SNP genotyping array
r/qtl2
Date
2020-08-04
Metadata
Show full item recordStatistics
Display Item StatisticsCitation
Riaz, A.; KockAppelgren, P.; Hehir, J.G.; Kang, J.; Meade, F.; Cockram, J.; Milbourne, D.; Spink, J.; Mullins, E.; Byrne, S. Genetic Analysis Using a Multi-Parent Wheat Population Identifies Novel Sources of Septoria Tritici Blotch Resistance. Genes 2020, 11, 887. https://doi.org/10.3390/genes11080887Abstract
Zymoseptoria tritici is the causative fungal pathogen of septoria tritici blotch (STB) disease of wheat (Triticum aestivum L.) that continuously threatens wheat crops in Ireland and throughout Europe. Under favorable conditions, STB can cause up to 50% yield losses if left untreated. STB is commonly controlled with fungicides; however, a combination of Z. tritici populations developing fungicide resistance and increased restrictions on fungicide use in the EU has led to farmers relying on fewer active substances. Consequently, this serves to drive the emergence of Z. tritici resistance against the remaining chemistries. In response, the use of resistant wheat varieties provides a more sustainable disease management strategy. However, the number of varieties offering an adequate level of resistance against STB is limited. Therefore, new sources of resistance or improved stacking of existing resistance loci are needed to develop varieties with superior agronomic performance. Here, we identified quantitative trait loci (QTL) for STB resistance in the eight-founder “NIAB Elite MAGIC” winter wheat population. The population was screened for STB response in the field under natural infection for three seasons from 2016 to 2018. Twenty-five QTL associated with STB resistance were identified in total. QTL either co-located with previously reported QTL or represent new loci underpinning STB resistance. The genomic regions identified and the linked genetic markers serve as useful resources for STB resistance breeding, supporting rapid selection of favorable alleles for the breeding of new wheat cultivars with improved STB resistance.Funder
Department of Agriculture, Food and the Marine; European Union; Biotechnology and Biological Sciences Research CouncilGrant Number
14/S/819; 794040; BB/N00518X/1ae974a485f413a2113503eed53cd6c53
https://doi.org/10.3390/genes11080887
Scopus Count
Collections
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as Attribution-ShareAlike 4.0 International