Skip to main content
ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #400988
Research Project: Genetics and Breeding of Lettuce, Spinach, Melon, and Related Species to Improve Production and Consumer-related Traits

Location: Crop Improvement and Protection Research

Title: Green Leaf, Red Leaf, and Romaine Lettuce Breeding Lines with Resistance to Leafminer, Corky Root, and Downy Mildew

Author
item Mou, Beiquan

Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/31/2023
Publication Date: 3/2/2023
Citation: Mou, B. 2023. Green leaf, red leaf, and romaine lettuce breeding lines with resistance to leafminer, corky root, and downy mildew. HortScience. 58(4):436-441. https://doi.org/10.21273/HORTSCI17069-22.
DOI: https://doi.org/10.21273/HORTSCI17069-22

Interpretive Summary: Leafminers are major insect pests of many important crops in the world such as lettuce. Corky root has been found in major lettuce-producing areas of the world, including North America. Downy mildew is one of the most economically important diseases of cultivated lettuce worldwide. The Agricultural Research Service, United States Department of Agriculture (USDA) announces the release of two green leaf (USDA-09456 and USDA-09512), a red leaf (USDA-07838), and two romaine (USDA-14489 and USDA-17536) varieties of lettuce. They were developed through conventional plant breeding methods. The varieties have resistance to leafminers, corky root, and/or downy mildew, and are adapted to the major lettuce production areas of the central coast of California. These varieties may be suitable for commercial production, and are suitable for use as sources of resistance to leafminer, corky root and downy mildew. Limited samples of seed are available for distribution to all interested parties for research purposes, including the development and commercialization of new cultivars.

Technical Abstract: Leafminers (Liriomyza spp.) are major insect pests of many important crops in the world such as lettuce (Lactuca sativa L.). Corky root has been found in major lettuce-producing areas of the world, including North America. Downy mildew is one of the most economically important diseases of cultivated lettuce worldwide. The Agricultural Research Service, United States Department of Agriculture (USDA) announces the release of two green leaf (USDA-09456 and USDA-09512), a red leaf (USDA-07838), and two romaine (USDA-14489 and USDA-17536) breeding lines of lettuce. They were developed through conventional plant breeding methods. The breeding lines have resistance to leafminers, corky root, and/or downy mildew, and are adapted to the major lettuce production areas of the central coast of California. The lines may be suitable for commercial production, and are suitable for use as sources of resistance to leafminer, corky root and downy mildew. Limited samples of seed are available for distribution to all interested parties for research purposes, including the development and commercialization of new cultivars.