Seedling Resistance to Tan Spot and Stagonospora nodorum Leaf Blotch in Wild Emmer Wheat (Triticum dicoccoides)

Tan spot and Stagonospora nodorum blotch (SNB), caused by Pyrenophora tritici-repentis and Stagonospora nodorum, respectively, are two destructive foliar diseases of wheat, causing significant yield reduction worldwide. The objective of this study was to evaluate 172 accessions of wild emmer wheat (...

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Veröffentlicht in:Plant disease. - 1997. - 92(2008), 8 vom: 11. Aug., Seite 1229-1236
1. Verfasser: Chu, C-G (VerfasserIn)
Weitere Verfasser: Xu, S S, Faris, J D, Nevo, E, Friesen, T L
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Tan spot and Stagonospora nodorum blotch (SNB), caused by Pyrenophora tritici-repentis and Stagonospora nodorum, respectively, are two destructive foliar diseases of wheat, causing significant yield reduction worldwide. The objective of this study was to evaluate 172 accessions of wild emmer wheat (Triticum dicoccoides) for seedling resistance to tan spot and SNB. All accessions were inoculated with P. tritici-repentis race 1 and a mixture of three diverse isolates of S. nodorum, respectively. The accessions were also evaluated for sensitivity to host-selective toxins (HSTs), including ToxA produced by both S. nodorum and P. tritici-repentis and culture filtrate produced by S. nodorum. A total of 34 accessions were resistant to tan spot, and 136 accessions were resistant to SNB. Among these accessions, 31 were resistant to both diseases. Significant correlations between HST insensitivity and disease resistance were observed. Our results showed that T. dicoccoides is a good genetic source of resistance to tan spot and SNB in wheat 
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700 1 |a Faris, J D  |e verfasserin  |4 aut 
700 1 |a Nevo, E  |e verfasserin  |4 aut 
700 1 |a Friesen, T L  |e verfasserin  |4 aut 
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