ARS | Publication request: Screening different Brassica spp. germplasm for resistance to Rhizoctonia solani AG-2-1 and AG-8

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: September 20, 2009
Publication Date: September 20, 2009
Citation: Babiker, E., Hulbert, S., Paulitz, T.C. 2009. Screening different Brassica spp. germplasm for resistance to Rhizoctonia solani AG-2-1 and AG-8. Phytopathology 99:S180.

Technical Abstract: Poor stands of canola seedlings in Pacific Northwest (PNW) have been associated with Rhizoctonia solani AG-2-1 and AG-8. A total of eighty five genotypes of Brassica napus, B. rapa, B. carinata, B. juncea and Sinapsis alba were evaluated in the growth chamber for their resistance to both R. solani AG-2-1 and AG-8. The percentage of seedling emergence after seven days, survival of seedlings after twenty one days, shoot length, root length and disease severity were used as criteria for evaluation. R. solani AG-2-1 was highly pathogenic compared to AG-8. None of these genotypes exhibited complete immunity or complete resistance, but significant differences in susceptibility levels were observed. Three varieties: two hybrids from Germany (Flash and Sitro) and one open pollinated from Dekalb(CWH688), performed significantly better than others.