Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: June 15, 2006
Publication Date: July 15, 2006
Citation: Chenault, K.D., Maas, A.L. 2006. A simple sequence repeat (SSR) marker in cultivated peanut (Arachis Hypogaea L.) is associated with resistance to Sclerotinia minor [abstract]. Phytopathology. 96:S23. Technical Abstract: The production of cultivated peanut is consistently threatened by various diseases and pests. Few molecular markers associated with disease resistance have been reported. The objective of this work was to use simple sequence repeat (SSR) primers previously reported for peanut to identify a molecular marker associated with resistance to the fungus Sclerotina minor (S. minor) Jagger. Total peanut genomic DNA was extracted from 66 cultivated peanut genotypes and subjected to PCR using different SSR primer pairs. One primer pair consistently produced a banding pattern distinctly different for those genotypes with demonstrated resistance to S. minor compared to that generated for genotypes with demonstrated susceptibility. The marker correlation with resistance is consistent in runner, Spanish and valencia peanut market-types. The inheritance of this marker and its correlation with S. minor resistance is being examined via screening of segregating populations. Use of this marker will greatly enhance the development of peanut cultivars with S. minor resistance.