Segregation for Stem Canker resistance in Southern Soybean crosses .
Some cultivars are resistant.
The parental donor of resistance is unknown for many cultivars, therefore it is not known which genes are the most common in the elite germplasm base. Progeny from 44 resistant X resistant soybean genetic populations were evaluated for their reaction to the fungus causing stem canker disease. Susceptible progeny were identified in only 8 populations. The frequency of susceptible plants in those was low. This indicates that few loci are represented in the current elite breeding gene pool.