New Races of Phytophthora sojae with Rps1-d Virulence

Hypocotyl inoculations of differential soybean (Glycine max) cultivars were used to identify seven new physiologic races of Phytophthora sojae (syn. P. megasperma f. sp. glycinea). Five of the new races were virulent on soybeans with the Rps1-d allele, while four of the new races were virulent on so...

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Veröffentlicht in:Plant disease. - 1997. - 81(1997), 6 vom: 30. Juni, Seite 653-655
1. Verfasser: Abney, T S (VerfasserIn)
Weitere Verfasser: Melgar, J C, Richards, T L, Scott, D H, Grogan, J, Young, J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1997
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Hypocotyl inoculations of differential soybean (Glycine max) cultivars were used to identify seven new physiologic races of Phytophthora sojae (syn. P. megasperma f. sp. glycinea). Five of the new races were virulent on soybeans with the Rps1-d allele, while four of the new races were virulent on soybeans with the Rps1-k allele. The Rps1-k and Rps1-d alleles provide resistance to a majority of the previously described races that cause Phytophthora root and stem rot. The seven new races were assigned race numbers 33, 34, 41, 42, 43, 44, and 45 since race numbers 35 through 40 were assigned to other new races recently identified in Ohio, California, Arkansas, and Iowa. The new races identified in this study constituted 14% of the 1993 isolates evaluated from 27 counties in central and northern Indiana. Races 1 and 3 were the most prevalent, representing 31 and 26% of the P. sojae isolates identified in 1993. Races 4, 6, 7, 8, 9, 13, 28, and 29 each constituted 2 to 6% of the 1993 isolates. Other races identified among the 1993 isolates included races 19, 21, 25, and 30 
650 4 |a Journal Article 
700 1 |a Melgar, J C  |e verfasserin  |4 aut 
700 1 |a Richards, T L  |e verfasserin  |4 aut 
700 1 |a Scott, D H  |e verfasserin  |4 aut 
700 1 |a Grogan, J  |e verfasserin  |4 aut 
700 1 |a Young, J  |e verfasserin  |4 aut 
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