Avoiding trade-off when enhancing Fusarium head blight resistance of barley

摘要: Fusarium head blight (FHB) is an economically important disease of barley caused by mycotoxin-producing species. Resistance to FHB associated with several agronomic traits, particularly height. Taller cultivars are generally more resistant; however increased height less favourable due the prospect lodging, creating a trade-off between resistance and qualities. Disease assays pathogens differing trophic lifestyles were conducted using BRI1 mutation lines, which display brassinosteroid (BR) insensitivity semi-dwarf phenotype. Interestingly, bri1 lines did not susceptibility FHB. Additionally, provided advantageous necrotrophs but increase biotrophs, demonstrating absence trade-off. The Chevallier Armelle significant resistance, yet also possess tall To determine whether these was height, bi-parental populations created crossing short, modern variety NFC Tipple. High density genetic maps produced Genotyping-by-Sequencing 384-SNP BeadXpress enable quantitative trait loci (QTL) mapping both traits. Within C×T population, QTL for identified on chromosome 6H either or heading date, suggesting that in this region linkage pleiotropy In contrast, within A×T population coincident date 3H. QTL analysis malting traits Chevallier, English landrace, undertaken. compared favourably Tipple, cultivar, characteristics including free amino nitrogen, diastatic power wort β-glucan content. This demonstrates may be useful potential source quality