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Nickell, Cecil D. Stephens, Paul Alan 2011-05-07T11:52:44Z 2011-05-07T11:52:44Z 10000-01-01 1992 Sudden death syndrome (SDS) of soybean (Glycine max (L.) Merr.) is caused by the soil borne fungus Fusarium solani (Mart.) Appel & Wollenw. emend. Snyd. & Hans. Symptoms of SDS include root rot, xylem discoloration, foliar chlorosis and interveinal necrosis. Microplot, field and greenhouse experiments were performed to study the development of SDS on soybean, develop a greenhouse inoculation method for F. solani, then study the relationship between the greenhouse and field reactions, and study the inheritance of resistance to F. solani. When microplots were used to compare SDS development on a cultivar set, cultivar differences in reaction to F. solani were found. Disease reaction on the cultivar set indicated that variation in the F. solani population existed. The microplot study also demonstrated that cultivars artificially inoculated with F. solani developed disease symptoms similar to that of plants growing in soil naturally infested with F. solani. A greenhouse technique was developed to inoculate soybean seedlings with F. solani. Disease scores for greenhouse inoculated seedlings were highly related to field scores. In a cross between two cultivars classified as resistant and susceptible respectively to F. solani, the greenhouse inoculation technique was used to study the inheritance of resistance to F. solani. A single dominant nuclear gene, Rfs1, was found to be responsible for resistance to F. solani in the soybean cultivar Ripley. Made available in DSpace on 2011-05-07T11:52:44Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9305705.pdf: 1860960 bytes, checksum: 5a96c7d88ad78ff3c5c1293fbd875414 (MD5) Previous issue date: 1992 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:33:43Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:12:33-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9305705 (UMI)AAI9305705 http://hdl.handle.net/2142/18962 eng Copyright 1992 Stephens, Paul Alan Agriculture, Agronomy Biology, Genetics Biology, Plant Physiology Expression and inheritance of resistance to Fusarium solani in soybean text Agriculture, Agronomy Agronomy University of Illinois at Urbana-Champaign Dissertation Ph.D.