Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: BREEDING LETTUCE CULTIVARS WITH HIGH QUALITY AND DISEASE RESISTANCE FOR ARIZONA
2012 Annual Report


1a.Objectives (from AD-416):
Develop iceberg, romaine, and leaf lettuce cultivars with resistance to bolting, tipburn, powdery mildew, big vein and extended shelf-life.


1b.Approach (from AD-416):
Field, greenhouse, laboratory, and molecular marker experiments to develop and select lettuce lines with improved performance for fall, winter, and spring planting slots in Arizona.


3.Progress Report:

The agreement was established in support of Objective 1 of the in-house project, the goal being to breed crisphead and mixed lettuce with resistance to pests and physiological defects common in Arizona.

Five field experiments were conducted to evaluate and select breeding lines and families for resistance to premature bolting, Fusarium wilt, big-vein disease, and the physiological defect tipburn. More than 300 families and breeding lines were evaluated, and 87 plants from 16 superior families were selected for additional breeding.


Last Modified: 12/19/2014
Footer Content Back to Top of Page