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The Soybean Resistance Gene Rag1 Does Not Protect Against Soybean Cyst and Root-knot Nematodes

M. Studham, G. C. MacIntosh, F. AvendaƱo, D. Soh, and G. L. Tylka

April 2009

Brief

The only well-characterized gene controlling soybean aphid (SBA) resistance is Mi-1.2, a tomato gene that also confers resistance to root-knot nematodes (RKN). Based on similarities between Mi-1.2 and Rag1, which produces a strong antibiosis-type resistance, the authors hypothesized that Rag1 could also provide resistance to nematodes. They evaluated two soybean lines, one carrying the Rag1 gene, and one with no resistance gene, for susceptibility or resistance to soybean cyst nematode (SCN) and RKN.

doi:10.1094/PHP-2009-0401-01-BR

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