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GrainGenes Reference Report: TAG-102-916

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Reference	TAG-102-916
Title	QTL analysis of resistance to the rice blast pathogen in barley (Hordeum vulgare)
Journal	Theoretical and Applied Genetics
Year	2001
Volume	102
Pages	916-920
Author	Sato K Inukai T Hayes PM
Abstract	Summary: Barley is compatible with the rice blast pathogen (Pyricularia oryzae Cav.). Fiftyfour barley cultivars of diverse geographic origin and pedigree were inoculated with three isolates of the rice blast pathogen. All barley genotypes showed blast disease symptoms when inoculated at the seedling stage with each of the three isolates. However, one genotype showed quantitative resistance to all three isolates and three genotypes showed quantitative resistance to one or two of the isolates. By inoculating a set of doubled-haploid lines derived from the cross 'Harrington' (susceptible) and 'TR306' (resistant) with isolate Ken 54-20, we mapped quantitative trait loci (QTLs) determining seedling stage blast resistance. At all QTLs, TR306 contributed the resistance alleles. The four QTLs, when considered jointly, explained 43.6% of the phenotypic variation in blast symptom expression. A comparison of the blast resistance QTLs with other disease resistance QTLs reported in this population revealed a region on chromosome 4 (4H) with multiple disease resistance loci. It will be useful to capitalize on the syntenic relationship of rice and barley and to integrate information on species-specific resistance genes with information on the reaction of the two species to the same pathogen
External Databases	http://link.springer-ny.com/link/service/journals/00122/bibs/1102006/11020916.htm
Keyword	[ Hide all but 1 of 50 ] alleles barley barley cultivars barley genotypes blast blast pathogen blast resistance chromosome chromosome-4 cross cultivar disease disease resistance disease symptoms doubled haploid doubled haploid lines gene genome mapping genotype hordeum hordeum vulgare isolate line loci multiple origin oryza pathogen pedigree phenotypic variation plant science population pyricularia pyricularia oryzae qtl qtl analysis quantitative resistance quantitative trait quantitative trait loci quantitative trait locus region resistance resistance gene resistant rice rice blast rust seedling stage symptoms trait

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