Pyramiding and dissecting disease resistance QTL to barley stripe rust
- 31 May 2006
- journal article
- research article
- Published by Springer Science and Business Media LLC in Theoretical and Applied Genetics
- Vol. 113 (3), 485-495
- https://doi.org/10.1007/s00122-006-0314-2
Abstract
Quantitative resistance (QR) to disease is usually more durable than qualitative resistance, but its genetic basis is not well understood. We used the barley/barley stripe rust pathosystem as a model for the characterization of the QR phenotype and associated genomic regions. As an intermediate step in the preparation of near-isogenic lines representing individual QTL alleles and combinations of QTL alleles in a homogeneous genetic background, we developed a set of QTL introgression lines in a susceptible background. These intermediate barley near-isogenic (i-BISON) lines represent disease resistance QTL combined in one-, two-, and three-way combinations in a susceptible background. We measured four components of disease resistance on the i-BISON lines: latent period, infection efficiency, lesion size, and pustule density. The greatest differences between the target QTL introgressions and the susceptible controls were for the latter three traits. On average, however, the QTL introgressions also had longer latent periods than the susceptible parent (Baronesse). There were significant differences in the magnitudes of effects of different QTL alleles. The 4H QTL allele had the largest effect, followed by the alleles on 1H and 5H. Pyramiding multiple QTL alleles led to higher levels of resistance in terms of all components of QR except latent period.Keywords
This publication has 26 references indexed in Scilit:
- Pyramiding and Validation of Quantitative Trait Locus (QTL) Alleles Determining Resistance to Barley Stripe RustCrop Science, 2003
- A Low‐Cost, High‐Throughput Polyacrylamide Gel Electrophoresis System for Genotyping with Microsatellite DNA MarkersCrop Science, 2003
- Pyramiding Quantitative Trait Locus (QTL) Alleles Determining Resistance to Barley Stripe RustCrop Science, 2003
- Coincident QTL Which Determine Seedling and Adult Plant Resistance to Stripe Rust in BarleyCrop Science, 2002
- ORGANIZATION OFGENESCONTROLLINGDISEASERESISTANCE IN THEPOTATOGENOMEAnnual Review of Phytopathology, 2001
- A “defeated” rice resistance gene acts as a QTL against a virulent strain of Xanthomonas oryzae pv. oryzaeMolecular Genetics and Genomics, 1999
- Tools for marking plant disease and pest resistance genes: a reviewAgronomy for Sustainable Development, 1995
- Components of partial resistance to Puccinia striiformis in barleyPlant Pathology, 1985
- Durable Resistance: Definition of, Genetic Control, and Attainment in Plant BreedingPhytopathology®, 1981
- Components of Resistance that Reduce the Rate of Epidemic DevelopmentAnnual Review of Phytopathology, 1979