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ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #346306
Title: Release of three iceberg lettuce populations that combined resistance to two soil borne diseases

Author
item Hayes, Ryan
item SANDOYA, GERMAN - University Of Florida
item Mou, Beiquan
item Simko, Ivan
item SUBBARAO, KRISHNA - University Of California

Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/5/2017
Publication Date: 2/27/2018
Citation: Hayes, R.J., Sandoya, G., Mou, B., Simko, I., Subbarao, K.V. 2018. Release of three iceberg lettuce populations that combined resistance to two soil borne diseases. HortScience. 53(2):247-250. https://doi.org/10.21273/HORTSCI12559-17.
DOI: https://doi.org/10.21273/HORTSCI12559-17

Interpretive Summary: The Agricultural Research Service, United States Department of Agriculture and the University of California, Davis, announce the release of three breeding populations of iceberg lettuce that combine resistance to the diseases corky root and Verticillium wilt. Both diseases are soil-borne, meaning that they are caused by microorganism that live in the soil and attack the lettuce plant through its roots. Corky root and Verticillium wilt are prevalent in coastal California and currently constrain commercial lettuce production if they are not managed. The breeding populations, designated RH14-1156, RH14-1157, and RH14-1158, are the first to combine resistance to these diseases. The populations are genetically uniform for disease resistance and all new cultivars descending from these populations are expected to be resistant. These populations should be used to select uniform and genetically stable iceberg lettuce cultivars adapted to environments where corky root and Verticillium wilt are prevalent and damaging.

Technical Abstract: The Agricultural Research Service, United States Department of Agriculture and the University of California, Davis, announce the release of three F2:4 breeding populations of iceberg lettuce (Lactuca sativa L.). The breeding populations combine the cor and Verticillium resistance 1 (Vr1) loci to confer resistance to the soil borne diseases corky root and Verticillium wilt race 1. These diseases are prevalent on the central coast of California and limit the ability of producers to sustainable grow a continual supply of lettuce. The breeding populations, designated RH14-1156, RH14-1157, and RH14-1158, were selected from the cross RH09-0689 × Telluride. The populations are genetically fixed for disease resistance and all progeny descending from these populations are expected to be resistant. These populations should be used to select inbred iceberg lettuce cultivars adapted to environments where corky root and Verticillium wilt race 1 are prevalent and damaging.