ARS | Publication request: Progress in the Development of Nutrient-Rich Nematode Resistant Carrots

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: November 2, 2008
Publication Date: January 17, 2009
Citation: Simon, P.W., Roberts, P.A., Nunez, J. 2009. Progress in the Development of Nutrient-Rich Nematode Resistant Carrots [abstract]. 33rd International Carrot Conference. Paper No. BG-101.

Technical Abstract: Carrots are an important source of nutrients for the U.S. diet and economic value to agriculture, but root-knot nematode threatens approximately 3/4 of U.S. carrot crop. We have identified resistance to M. javanica (MJ) and recent germplasm evaluations indicate additional genetic resistance for M. incognita (MI) in the MJ resistant selections. Furthermore, we have identified additional MI resistance in four unrelated germplasm sources. Now we are in a position to incorporate resistance from these several sources. While nematode resistance is of paramount importance for carrot growers, and for the environment, consumers make eating choices, including carrots, based upon appearance and flavor, and they expect carrots to be nutritious. Breeders have been successful in genetically improving carrot flavor and nutritional content (primarily provitamin A carotenoids), and the new nematode resistant germplasm varies widely in nutritional content and flavor. Using a combination of detailed screening for nematode resistance along with marker-assisted genetic selection and field evaluation of crop performance, we propose strategies for incorporating improved nematode resistance along with improved nutritional value for the U.S. carrot production industry.