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    • Project Overview
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  • Crop & Disease management
    • Cucumber Disease Management
    • Melon Disease Management
    • Squash Disease Management
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  • Breeding & Genomics
    • Development of Genomic Tools for Cucurbit Species
    • Cucurbit Genomics Database
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    • Breeding Melon for Disease Resistance
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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.

CucCAP scientists identify QTL for Phytophthora resistance in squash

March 1, 2021March 25, 2021 cuccap CucCAP Squash Team, Featured Articles

CucCAP scientists from the Cornell University research groups of Michael Mazourek and Christine Smart along with Michael Gore’s lab combined linkage mapping and bulked segregant methods for molecular mapping and QTL identification.

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Meet the CucCAP Watermelon Team

February 10, 2021April 21, 2021 cuccap CucCAP Watermelon Team

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.

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Tropical Squash | Culinary Breeding Network

February 2, 2021March 22, 2021 cuccap CucCAP Squash Team

Linda Wessel Beaver shares some details about breeding tropical squash for virus resistance in the first CucCAP grant with the Culinary Breeding Network’s Winter Squash Week.

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Winter Squash: background, diversity and breeding

February 2, 2021January 22, 2024 cuccap CucCAP Squash Team, Cucurbit Crop & Disease Management Resources

Cornell squash breeder and CucCAP Squash Team leader, Michael Mazarouek discusses the history of breeding winter squash.

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CucCAP scientists test new squash breeding lines for performance and resistance to Phytophthora crown and root rot

February 1, 2021March 31, 2022 cuccap CucCAP Squash Team, Featured Articles

Researchers at Cornell University developed squash breeding lines with increased resistance to Phytophthora crown and root rot.

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Cucurbit crop and disease management information presented at Winter meetings

January 22, 2021January 22, 2021 cuccap CucCAP Disease Management Team, Cucurbit Crop & Disease Management Resources

CucCAP crop and disease management specialists presented cucurbit crop and disease management strategies at winter meetings in several regions of the country.

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Meet the CucCAP Cucumber Team

January 12, 2021April 5, 2021 cuccap CucCAP Cucumber Team

The CucCAP cucumber team is breeding cucumbers for resistance to downy mildew and Phytophthora fruit rot.

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The CucCAP Bioinformatics team

January 6, 2021January 20, 2021 cuccap CucCAP Genomics & Bioinformatics Team

The CucCAP Bioinformatics team is led by BTI plant genomics scientist Zhangjun Fei. Team members include Shan Wu who is working to integrate the watermelon pan genome and Jingyin Yu who is redesigning the data base.

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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

 

News, Events, and the latest Cucurbit Disease Information

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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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