Project Number: 6402-21220-009-00
Project Type: Appropriated

Start Date: Feb 27, 2007
End Date: Feb 26, 2012

Objective:
Broaden soybean germplasm for genetic resistance to new and emerging nematode populations; identify shifts in genetic profiles and virulence of soybean cyst nematode; and measure effects of cultural practices and diseases on soybean cyst nematode reproduction.

Approach:
Evaluate accessions of Glycine max and Glycine soja for resistance to multiple populations of soybean cyst nematode (SCN), particularly those capable of reproducing on cultivars utilizing PI 88788 as resistance source. Characterize new sources for unique resistance genes and develop molecular markers associated with resistance. Pyramid resistance genes into elite backgrounds of maturity groups III, IV, and V in combination with resistance to predominant fungal pathogens to develop improved germplasm/ cultivars. Characterize SCN field populations to determine effectiveness of current sources of resistance. Predict stability and changes in SCN populations by accelerated selection pressure in greenhouse tests. Determine rhizosphere factors that influence SCN reproduction under different tillage and cropping schemes. Evaluate effects of concomitant infection of charcoal rot and other diseases on SCN reproduction.