Fig. 1. Abbreviated LGs E and G maps of soybean (Cregan et al., 1999). Microsatellite markers, Satt598 and Satt491 on LG E and Satt288 and Satt472 on LG G, span the genetic regions conferring resistance to SCN introgressed from G. soja PI 468916 in both LDX01–1 and LDX01–2. Microsatellite marker Satt309 marks the SCN resistance rhg1 locus from ‘Dwight’ in LDX01–2. G. max A81–356022 alleles are present at Satt309 within LDX01–1.