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. Researchers in Dr. Yiqun Weng’s lab at USDA-ARS 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.
A valuable resource available to cucurbit growers on the CucCAP website is the Cucurbit Downy Mildew ipmPIPE Pest Information Platform for Extension and Education. The CDM ipmPipe is hosted at NC State University. This website was recently updated and forecasting for the 2020 growing season will begin in late March or early April. The site indicates that CDM […]
In early 2020, CucCAP Vegetable Pathology and Crop Production Extension Specialists published plant disease management reports and Cucurbit cultigen evaluations from recent field trials. These reports provide valuable information for cucurbit crop producers, seed companies and other CucCAP stakeholders. The 2019 Plant Disease Management Reports provide disease resistance information for downy mildew on cucumber, Phytophthora […]
Crops: Orange Flesh Melon, Pumpkin, Watermelon, and Zucchini squash
Evaluations include control of Downy mildew on cucumber, Downy mildew on squash and Phytophthora fruit rot on squash
The CucCAP website provides links to resources for Cucurbit genomic scientists and plant breeders including the Cucurbit Genomics Database and the Cucurbit genetics cooperative. Between 2015 and 2020, the CucCAP team published more than 92 refereed research publications. During this time, the scientists made over 149 presentations at universities and scientific conferences. Continue Reading Resources for Cucurbit disease management […]
In recent years, significant progress has been made in molecular mapping and identification of genes and QTL responsible for key phenotypic traits. CucCAP scientists and collaborators led by Drs. Yuhui Wang and Yupeng Pan from Dr. Yiqun Weng’s lab at the University of Wisconsin at Madison provide an extensive review of the literature to systematically […]
CucCAP Vegetable Pathologist, Mary Hausbeck, discusses Phytophthora susceptiblity in cucumbers, summer squash and zucchini. Disease symptoms on fruit can take a few days to appear after infection. Fruit can appear healthy at harvest and then develop disease symptoms during transit or on grocers’ shelves. The classic symptom of phytophthora is a white, powdered sugar appearance. Cucurbits […]