Variability for Resistance to Phytophthora nicotianae Within a Collection of Nicotiana rustica Accessions

Black shank, caused by Phytophthora nicotianae, is one of the most important diseases affecting tobacco (Nicotiana tabacum) production worldwide. Many current tobacco cultivars possess immunity to race 0 of this pathogen conferred by introgressed dominant genetic factors. Novel alleles conditioning...

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Veröffentlicht in:Plant disease. - 1997. - 95(2011), 11 vom: 14. Nov., Seite 1443-1447
1. Verfasser: Nifong, J M (VerfasserIn)
Weitere Verfasser: Nicholson, J S, Shew, H D, Lewis, R S
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Black shank, caused by Phytophthora nicotianae, is one of the most important diseases affecting tobacco (Nicotiana tabacum) production worldwide. Many current tobacco cultivars possess immunity to race 0 of this pathogen conferred by introgressed dominant genetic factors. Novel alleles conditioning resistance to alternative races are desired. The objective of this research was to evaluate variability for black shank resistance within a collection of N. rustica germplasm using both soilborne disease nurseries and controlled race-specific (race 0 and race 1) inoculations. Nearly all of the 86 accessions studied exhibited very high resistance to race 0, and many displayed levels of race 1 resistance greater than that exhibited by the resistant flue-cured tobacco check, 'K 346'. Materials found to be highly resistant to race 0 and race 1 in growth-chamber experiments also had the best survivability in field disease nurseries. N. rustica accessions TR 6, TR 12, TR 16, TR 21, TR 20, TR 48, TR 54, TR 57, and TR 69 could be sources of novel alleles with large effects on black shank resistance, and could have value for burley and flue-cured tobacco breeding 
650 4 |a Journal Article 
700 1 |a Nicholson, J S  |e verfasserin  |4 aut 
700 1 |a Shew, H D  |e verfasserin  |4 aut 
700 1 |a Lewis, R S  |e verfasserin  |4 aut 
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