Location: Crop Improvement and Protection Research
2012 Annual Report
1)determine the genetic basis of horticulturally important traits in lettuce. .
2)develop commercially-useful molecular markers for horticulturally important genes and to release these markers to make MAS (marker assisted selection) available to the lettuce breeding industry..
3)develop and release advanced lettuce breeding lines and landmark cultivars of all lettuce types that are resistant to multiple diseases and have superior horticultural characteristics including: wide adaptability, improved color and nutritional quality, extended shelf-life, are slow bolting, and have tipburn resistance..
4)train students, postdocs, and commercial breeders to operate in a data-rich environment. This project is monitored using conference calls, email, and biennial meetings.
We selected, contributed, and assisted evaluation of lettuce germplasm in a field experiment for nitrogen use efficiency and water use efficiency. We determined the inheritance of decay of salad-cut lettuce in modified atmosphere packaging in two independent populations. Progress was made in developing molecular markers to select for slow decay using marker assisted selection. A post-doc was mentored on research to determine the inheritance of resistance to race 2 isolates of V. dahliae. Advanced breeding lines from the USDA and UC breeding populations were evaluated in replicated field experiments to evaluate multiple horticultural and quality traits.