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    • Cucumber Disease Management
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    • Development of Genomic Tools for Cucurbit Species
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CucCAP Project

Contributions to the CucCAP project by the Bioinformatics Team, Cucurbit Crop Breeding Teams, and the Integrated Disease Management Team.

Clade 2 Cucurbit downy mildew spores in Michigan

June 13, 2023July 3, 2023 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

Growers are urged to scout cucumbers and melons and check the website for updates.

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Cucumber Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Cucumber Team

View all tables and figures in pages 37 – 48 of the pdf version of this report.

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Integrated Crop and Disease Management Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Disease Management Team

View all tables and figures in pages 62 – 85 of the pdf version of this report.

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Melon Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Melon Team

View the 2023 CucCAP Melon Team Report in pages 35-48 of the PDF version of this report

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Watermelon Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Watermelon Team, Cucurbit Crop & Disease Management Resources

View all tables and figures in pages 21 – 34 of the pdf version of this report.

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Genomics and Bioinformatics Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Genomics & Bioinformatics Team

View all tables and figures in pages 16 – 20 of the pdf version of this report.

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Squash Team | 2023 Progress Report

June 10, 2023August 7, 2024 cuccap CucCAP Squash Team

View all tables and figures in pages 49 – 61 of the pdf version of this report.

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Powdery Mildew on Watermelon in SC

May 27, 2023December 1, 2023 cuccap CucCAP Disease Management Team

CucCAP Plant Pathologist Tony Keinath found Powdery Mildew on seedless watermelon at the Clemson Coastal Research and Education Center (REC) on Tuesday, May 23.

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Featured Article

CucCAP scientists identify markers for powdery mildew resistance in watermelon

Powdery mildew outbreaks, caused by Podosphaera xanthii, cause reduced yields and fruit quality in watermelon. CucCAP scientists at Clemson University and the USDA Vegetable Laboratory Charleston SC employed a bulked segregant analysis approach using data from 1147 accessions from the USDA Citrullus germplasm collection to perform an extreme-phenotype genome-wide association study (XP-GWAS) of tolerance to P. xanthii race 2W. Kompetitive Allele-Specific PCR (KASP) markers were designed for significant SNPs associated with reduced disease. The best marker in each region explained 21-31% of the variation in powdery mildew tolerance.

For further reading:

Branham et al., 2025. Extreme-phenotype genome-wide association study (XP-GWAS) of powdery mildew race 2 W tolerance in the USDA Citrullus germplasm collection. Scientific Reports. DOI10.1038/s41598-025-89445-8

 

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USDA National Institute of Food and Agriculture U.S. DEPARTMENT OF AGRICULTURE

The Cucurbit Coordinated Agricultural Project (CucCAP) is a USDA-National Institute of Food and Agriculture Specialty Crop Research Initiative grant under award number
2020-51181-32139.

Cooperating Institutions:

Boyce Thompson Institute; Cornell University; Michigan State University; North Carolina State University; Clemson University; University of Puerto Rico; University of Wisconsin; University of Florida; University of Georgia; West Virginia State University; U.S. Department of Agriculture, Agricultural Research Service

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