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GrainGenes Reference Report: MBR-12-309

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Reference	MBR-12-309
Title	Marker assisted selection of Fusarium head blight resistance genes in two doubled haploid populations of wheat
Journal	Molecular Breeding
Year	2003
Volume	12
Pages	309-317
Author	Yang ZP [ Show all 6 ]
Abstract	Summary: Fusarium head blight, caused primarily by Fusarium graminearum, is the most important wheat disease in Canada causing both grain yield and quality losses. Selection for resistance to Fusarium head blight in breeding programs has been difficult because of the complex inheritance of resistance and the environmental effect on disease development and expression. The present study was conducted to examine microsatellite markers associated with resistance to Fusarium head blight and evaluate the effectiveness of these microsatellite markers in selecting for resistance to Fusarium head blight in two doubled-haploid populations segregating for Sumai 3-derived resistance genes. Both doubled-haploid populations were evaluated for resistance to Fusarium head blight by inoculation with F. graminearum in the greenhouse. Eight microsatellite markers from chromosomes 3BS, 6B and 5AL were applied to both doubled-haploid populations. The most significant microsatellite markers were found on the short arm of chromosome 3B, explaining 12% and 36% of phenotypic variation for resistance in the DH181/AC Foremost and AC Foremost/93FHB 21 doubled-haploid populations, respectively. Another important microsatellite marker, gwm644 on 6B, explained 21% of the phenotypic variation for resistance to Fusarium head blight in the DH181/AC Foremost doubled-haploid population. There was a general lack of marker polymorphism on 5AL for the parents used in this study. Microsatellite markers on chromosome 3BS in addition to microsatellite markers on 6B have the potential for accelerating the development of wheat cultivars with improved Fusarium head blight resistance through the use of marker-assisted selection
Keyword	[ Hide all but 1 of 28 ] assisted selection barley blight breeding canada cultivar disease disease resistance dna fusarium graminearum fusarium head blight gene graminearum head blight head blight resistance head-blight inheritance microsatellite phenotypic variation polymorphism program qtl quality resistance scab selection triticum aestivum yield

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