Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 12/12/2003
Publication Date: 9/1/2004
Citation: Hill, C.B., Hobbs, H.A., Hartman, G.L. 2004. Variability in green stem incidence among soybean cultivars. Phytopathology; 2004.
Technical Abstract: Green stem is a disorder of soybean (Glycine max Merr.) that when prevalent in a soybean field, complicates harvesting by making the stems harder to cut. The cause of green stem is unknown. Incidence of green stem (percentage of plants with green stem) in several hundred commercial cultivars was evaluated in Illinois state yield trials during 2000-2002. Data was collected from trials at Urbana, Illinois in 2000 and 2001. There were highly significant differences among cultivars for green stem incidence (P < 0.001). In 2002, data was collected at three locations: Dekalb, Monmouth, and Urbana, Illinois. Mean incidence was 30% at Monmouth, 19% at Dekalb, and 9% at Urbana. Again, differences among cultivars for green stem incidence were highly significant (P < 0.001), indicating that there was genetic variability for resistance to green stem among the cultivars. Public cultivars with high green stem incidence included Macon, Maverick, Pana, and Williams 82, while Dwight, Loda, and Savoy had low incidence. A summary of the incidence of green stem in commercial cultivars is online at http://web.aces.uiuc.edu/vips.