QTL analysis of resistance to the rice blast pathogen in barley (Hordeum vulgare)

Kazuhiro Sato, T. Inukai, P. M. Hayes

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)916-920
Number of pages5
JournalTheoretical And Applied Genetics
Volume102
Issue number6-7
DOIs
Publication statusPublished - 2001

Fingerprint

blast disease
Quantitative Trait Loci
Hordeum
Hordeum vulgare
quantitative trait loci
barley
pathogens
Disease Resistance
Genotype
Seedlings
signs and symptoms (plants)
disease resistance
genotype
Magnaporthe oryzae
Chromosomes, Human, Pair 4
seedlings
Haploidy
doubled haploids
Pedigree
phenotypic variation

Keywords

  • Barley
  • Blast
  • Disease resistance
  • Genome mapping
  • Quantitative trait locus

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Horticulture
  • Plant Science
  • Genetics
  • Genetics(clinical)

Cite this

QTL analysis of resistance to the rice blast pathogen in barley (Hordeum vulgare). / Sato, Kazuhiro; Inukai, T.; Hayes, P. M.

In: Theoretical And Applied Genetics, Vol. 102, No. 6-7, 2001, p. 916-920.

Research output: Contribution to journalArticle

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