2013 Annual Report
1a.Objectives (from AD-416):
Deployment of nematode resistant carrots to U.S. growers and seed industry.
1b.Approach (from AD-416):
We have discovered multiple genetic sources of nematode resistance in carrot germplasm. In this project we will confirm the strength of the resistance, intercross best resistance, produce ample seed for extensive field testing, and release best resistance to the public, especially growers and seed companies. We will also evaluate horticultural quality including field performance traits (color, shape, uniformity) and consumer quality (flavor and nutritional value), hold field days for the carrot production community, and confirm genetic models of resistance in mapping populations.
This project was renumbered from 3655-21000-048-18A to 3655-21000-062-06A. This is the final report, project terminated 08/31/2013. Breeding populations were advanced and molecular markers evaluated to identify a new nematode resistance gene from Middle Eastern carrots. Molecular markers to track this gene were identified on chromosome 6. Nutritional quality evaluations have been made based upon carotenoid and anthocyanin pigment levels and types. Nutritional quality is equivalent to or up to 30% higher in nematode selections that in the base population from which resistance was derived. This research relates to the objective of deploying nematode-resistant carrot germplasm by evaluating consumer quality characteristics and genetic markers in germplasm to be deployed.