Quantitative trait loci mapping disease resistance to TSWV, leaf spots, and aflatoxin contamination of peanut (Arachis hypogaea L.) using whole-genome re-sequencing


Board of Regents of the University System of Georgia on behalf of the University of Georgia Cooperative Extension Service and University of Georgia Research Foundation, Inc.

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Southeast (GA, FL, AL)

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Identification of peanut resistance genes and markers for TSWV and leaf spot diseases. Peanut is vulnerable to a range of diseases, such as leaf spots and Tomato spotted wilt, which cause yield loss and increase chemical control cost every year. The most promising solution for managing peanut diseases is using resistant cultivars. In collaboration with researchers at the University of Georgia and the University of Florida, we have developed two genetic maps from crosses of Tifrunner x GT-C20 and SunOleic 97R x NC94022. These two maps have been used for identification of molecular markers linked to resistance to the diseases of Tomato spotted wilt, early leaf spot and late leaf spot, and also used for identification of markers associated with oil quality such as high oleic acid and total oil content. Molecular markers will short breeding cycle from over 10 years to less than five years. Peanut growers have been supporting research to develop molecular markers for resistance and molecular breeding for resistant cultivars with high oleic content. The developed resistant cultivars will give farmers a better and more effective management tools for diseases and produce high quality peanuts. This is the first study for identification of molecular markers for TSWV and leaf spots, and future studies will be needed to refine the locations of these markers on the map. 

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