The Soybean Resistance Gene <i>Rag1</i> Does Not Protect Against Soybean Cyst and Root-knot Nematodes

Fig. 1. Effect of Rag1 on nematode infections. (A) Two related soybean lines, LD16060 and SD01-76R, that carry the Rag1 gene or no resistance gene respectively, were sowed in soil infested with the soybean cyst nematode (SCN). Plants were collected after 45 days, and SCN females were removed from roots and counted. The soybean varieties Kenwood 94 and Jack were used as susceptible and resistant controls, respectively. (B) A soybean line carrying the Rag1 gene (LD16060) and a related line without Rag1 (SD01-76R) were sowed in soil infested with the root-knot nematode (RKN, Meloidogyne incognita). Plants were collected after 45 days of growth, roots were stained, and galls were quantified. RKN susceptible (Early Girl hybrid) and resistant (Beefmaster hybrid) tomato plants were used as controls. In both experiments ten plants of each line were used, and the experiment was repeated three times with similar results. Results from a representative experiment are shown. Means with the same letter were not significantly different (Fisher’s least-significant-difference test, a = 0.05). * Data were normalized by root volume.



Image from Plant Health Progress article:
The Soybean Resistance Gene Rag1 Does Not Protect Against Soybean Cyst and Root-knot Nematodes