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Evaluation of Soybean Germplasm for Resistance to Phakopsora pachyrhizi

M. R. Miles, R. D. Frederick, and G. L. Hartman

January 2006


The accessions in the USDA Germplasm Collection at the Univ. of Illinois were evaluated to identify soybean germplasm with resistance to soybean rust. The inoculation program used a mixture of four P. pachyrhizi isolates. Of 16,595 accessions rated for rust severity, 3,215 were selected for a second round of evaluation. Of these, 805 were selected for further evaluation. Some of these selected accessions have the potential to provide soybean rust resistance genes that may be useful for incorporation into commercial soybean cultivars.


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