Team members: Yiqun Weng (USDA, ARS), Rebecca Grumet (Michigan St. Univ.), Todd Wehner (North Carolina St. Univ.) Develop genomic approaches and tools GBS of PI collection, establish GWAS core Personnel: Weng (Wang Y, Tan J, Dymerski R), Grumet (Grumet R, Hammar S.) and Wehner (Wehner T., Silverman EJ) Labs GBS of PI lines and GWAS […]
The cucumber line WI2757 has been an important sources of disease resistances for cucumber breeding, but it has some drawbacks including later flowering and poor growth under field conditions. The genetic basis for these traits is not known. CucCAP researchers conducted molecular mapping using populations involving WI2757, and uncovered a large paracentric inversion of about 10 megabases in length on cucumber chromosome 1 of WI2757. They found that inversion region harbors genes or quantitative trait loci for fruit length, diameter, fruit shape, fruit number, and flowering time.
CucCAP scientists and collaborators provide an extensive review of the literature to systematically document genes for simply inherited traits, QTL for 130 quantitative traits, and develop recommendations for QTL nomenclature in cucumber. In a separate study, researchers conducted comparative analysis on the genetic basis of fruit size and shape variation among cucumber, melon and watermelon, and revealed both conserved and unique genetic architecture of fruit size/shape variation among cucurbit crops.
CucCAP plant breeder, Todd Wehner talks about breeding cucumber and watermelon varieties for disease resistance.
Changes in Winter Squash Fruit Exocarp Structure Associated with Age-Related Resistance to Phytophthora capsici by Safa A. Alzohairy, Ray Hammerschmidt, and Mary K. Hausbeck Published Online:27 Aug 2019 Phytophthora capsici is a destructive pathogen of cucurbits causing root, crown, and fruit rot. Winter squash (Cucurbita sp.) production is limited by this pathogen in Michigan and other U.S. growing […]
Team members: Yiqun Weng (USDA, ARS), Rebecca Grumet (Michigan St. Univ.), Todd Wehner (North Carolina St. Univ.) 1. Develop genomic approaches and tools 1.2 GBS of PI collection, establish GWAS core Personnel: Weng (Wang Y, Tan J, Dymerski R), Grumet (Grumet R, Hammar S.) and Wehner (Wehner T., Silverman EJ) Labs GBS of PI lines […]
Ben Mansfeld’s research focuses on cucumber resistance to Phytophthora capsici (a fungus-like plant disease that affects many crops including cucurbits). In the Grumet Lab, researchers have screened over 1300 different cucumber varieties from around the world to try to identify natural sources of disease resistance. Through this process, they identified an age-related resistance; young […]
A pickling cucumber variety trial was planted at the Saginaw Valley Research and Extension Center (43.399097, -83.694497, Frankenmuth, Michigan). Rijk Zwaan (RZ) and Bejo (BJ) seed companies donated parthenocarpic (seedless) cucumber seeds for the trial. A PDF version of this report can be found at the Midwest Vegetable Trial Report for 2018 website. Continue Reading