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QTL mapping and quantitative disease resistance in plants
1Department of Plant Pathology, University of Minnesota, St. Paul, Minnesota 55108, USA.
Annual Review of Phytopathology
|January 1, 1996
Summary
Quantitative trait locus (QTL) mapping helps understand complex plant disease resistance by identifying resistance genes and their interactions. This approach aids in developing disease-resistant crops through marker-assisted selection and gene cloning.
Area of Science:
- Plant Genetics
- Molecular Biology
- Agronomy
Background:
- Complex plant disease resistance involves multiple genes and environmental factors.
- Understanding genetic control is crucial for developing resistant crop varieties.
- Quantitative trait locus (QTL) mapping is a powerful tool for dissecting complex traits.
Purpose of the Study:
- To elucidate the genetic architecture of plant disease resistance using QTL mapping.
- To identify specific resistance loci and analyze their interactions.
- To provide a framework for marker-assisted selection and gene cloning.
Main Methods:
- Utilizing quantitative trait locus (QTL) mapping to analyze genetic variation in disease resistance.
- Describing the roles of specific resistance loci.
- Assessing the race-specificity of partial resistance genes.
Main Results:
- QTL mapping reveals the number of loci involved in complex disease resistance.
- Identified epistatic and environmental interactions influencing resistance.
- Demonstrated the relationship between qualitative and quantitative resistance loci.
Conclusions:
- QTL mapping is effective for studying complex plant disease resistance.
- Provides insights into gene interactions, environmental effects, and pathogen biology.
- Facilitates marker-assisted selection and positional cloning of resistance genes for crop improvement.