“…A QTL for partial resistance to P. sojae was reported on MLG F between marker Satt252 and Satt423 (Burnham et al, 2003b) and QTL's conferring resistance to Meloidogyne javanica, M. arenaria, Heterodera glycines, and soybean sudden death syndrome (SDS) have been mapped on the MLG F (Concibido et al, 1994;Hnetkovsky et al, 1996;Tamulonis, et al, 1997a;Tamulonis et al, 1997b;Webb et al, 1995). Nutrient availability is a limiting factor for microbial growth and activity in agricultural soils, as a result plant pathogenic fungi and oomycetes propagules survive in soils in a state of exogenous dormancy or fungistasis (Lockwood, 1977). In order for a successful hostpathogen interaction to be initiated, fungistasis must be overcome by external stimulants (Curl and Truelove, 1986;Mitchell, 1976).…”