Project Number: 6402-21220-011-09
Project Type: Reimbursable

Start Date: Oct 01, 2012
End Date: Sep 30, 2013

Objective:
Phase III - Incorporate novel Soybean Cyst Nematode (SCN)-resistance genes into soybean germplasm of early maturity groups (I, II, III) combined with resistance to other economically important fungal disease with adequate agronomic performance.

Approach:
This in an ongoing collaborative research project. In brief, Soybean populations and lines are continued to be developed using different sources of Soybean Cyst Nematode (SCN) resistance identfied by ARS scientist. Crossing are performed between new sources of resistance from ARS and the elite lines developed by Iowa State University (ISU). Crosses are peformed in Puerto Rico at ISU Research Station-Isabella in Puerto Rico. Selections for resistance using molecular markers tagged to SCN resistance are performed at USDA-ARS in Jackson, TN. Confirmation for SCN resistance is also accomplished at USDA-ARS greenhouses located in Jackson, TN, for selected advanced lines and populations. ARS scientist has developed and standardized greenhouse bioassays for SCN resistance and also maintains cultured nematode populations for stable reactions. Concurrent field evaluations are done in three locations, ISU-Puerto Rico, ISU-Ames, IA, and USDA-ARS, Jackson, TN, using standard methods.