QTL analysis of resistance to the rice blast pathogen in barley (Hordeum vulgare) |
| |
Authors: | K Sato T Inukai P M Hayes |
| |
Institution: | (1) Research Institute for Bioresources, Okayama University, Kurashiki 710-0046, Japan e-mail: kazsato@rib.okayama-u.ac.jp Fax: +81-86-434-1249, JP;(2) Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan, JP;(3) Depertment of Crop and Soil Science, Oregon State University, Corvallis, OR 97331, USA, US |
| |
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.
Received: 7 January 2000 / Accepted: 22 September 2000 |
| |
Keywords: | Barley Blast Disease resistance Genome mapping Quantitative trait locus |
本文献已被 SpringerLink 等数据库收录! |
|