The CucCAP Watermelon team is led by USDA-ARS Research Geneticist Amnon Levi. Co-investigators include Sandra Branham, Cecelia McGregor, Kai-Shu Ling, Shaker Kousik, Umesh Reddy, and Pat Wechter.
We identified QTLs associated with gummy stem blight resistance in an interspecific F2:3 Citrullus population and developed marker assays for selection of the loci in watermelon.
The Kousik Lab published “Elucidation of resistance signaling and identification of powdery mildew resistant mapping loci (ClaPMR2) during watermelon-Podosphaera xanthii interaction using RNA-Seq and whole-genome resequencing approach”.
CucCAP watermelon and cucumber breeder Todd Wehner recently earned a top international industry recognition, Pickle Packers International’s Hall of Fame Award.
In a recent study, CucCAP researchers used a digital imaging technology to evaluate the root systems in 335 watermelon accessions.
Overall objectives: Identifying quantitative trait loci (QTL) associated with resistance to major and emerging diseases, developing useful molecular markers and utilizing the genomic tools to incorporate resistance into watermelon cultivars. Major diseases: Fusarium wilt, Gummy stem blight, Powdery mildew, Phytophthora fruit rot, Papaya ringspot virus (PRSV) and Cucumber green motile mosaic virus (CGMMV). Team Members: […]
Breeding, Genetics, and Genomics Publications Bertucci, M.B, K.M. Jennings, D.W. Monks, J.R. Schultheis, F.J. Louws, and D.L. Jordan. 2019. Interference of (Amaranthus palmeri) density in grafted and nongrafted watermelon. Weed Sci. 67(2):229-238. Branham, S.E., A. Levi, M.W. Farnham, and W.P. Wechter. 2016. A GBS‑SNP‑based linkage map and quantitative trait loci (QTL) associated with resistance to Fusarium oxysporum f. sp. Niveum race 2 […]
Multiple disease screens of the USDA watermelon germplasm collection have highlighted the value of wild type watermelons as a source for enhancing resistance to diseases in modern watermelon cultivars. CucCAP researchers collaborated with Sakata Seed America on generating genetic populations and on conducting genetic analyses to identify genetic loci that confer resistance to Fusarium wilt and papaya ring-spot virus.