Identification of Soybean Genotypes Resistant to Cercospora sojina by Field Screening and Molecular Markers

Frogeye leaf spot (FLS) of soybean, caused by Cercospora sojina, has been a problem in the southern United States for many years and has recently become a greater problem in the northern United States. Cultivars resistant to FLS have been developed for planting in the southern United States and resi...

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Veröffentlicht in:Plant disease. - 1997. - 93(2009), 4 vom: 11. Apr., Seite 408-411
1. Verfasser: Mian, Rouf (VerfasserIn)
Weitere Verfasser: Bond, Jason, Joobeur, Tarek, Mengistu, Alemu, Wiebold, William, Shannon, Grover, Wrather, Allen
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2009
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Frogeye leaf spot (FLS) of soybean, caused by Cercospora sojina, has been a problem in the southern United States for many years and has recently become a greater problem in the northern United States. Cultivars resistant to FLS have been developed for planting in the southern United States and resistance in many of these cultivars is conditioned by the Rcs3 gene. This gene conditions immunity to all known races and isolates of the pathogen. Resistance to C. sojina in soybean genotypes (cultivars and breeding lines) adapted to north-central U.S. production region is unknown. The objectives of this study were to (i) identify maturity group (MG) III, IV, and V soybean genotypes resistant to C. sojina race 11 by field screening at multiple locations over years and (ii) determine whether FLS resistance in these genotypes is likely to be conditioned by the Rcs3 gene. In total, 1,350 genotypes were evaluated for resistance to race 11 in field trials, and 13 MG III, 45 MG IV, and 15 MG V genotypes did not develop symptoms of FLS. Of these, 54 were subsequently tested for the possible presence of Rcs3 using five molecular markers located within 2 centimorgans (cM) of the gene. None of the MG III genotypes tested had the Rcs3 haplotype of cv. Davis, the source of Rcs3; six of the MG IV genotypes and seven of the MG V genotypes had the Rcs3 haplotype. This is the first report of the presence of the Rcs3 haplotype in LN 97-15076 and S99-2281. The soybean genotypes predicted to have the Rcs3 gene and other genotypes with no FLS symptoms in field trials may be useful in developing soybean cultivars with broad resistance to FLS and adapted to the northern United States 
650 4 |a Journal Article 
700 1 |a Bond, Jason  |e verfasserin  |4 aut 
700 1 |a Joobeur, Tarek  |e verfasserin  |4 aut 
700 1 |a Mengistu, Alemu  |e verfasserin  |4 aut 
700 1 |a Wiebold, William  |e verfasserin  |4 aut 
700 1 |a Shannon, Grover  |e verfasserin  |4 aut 
700 1 |a Wrather, Allen  |e verfasserin  |4 aut 
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