Evaluation of the durability of the <Emphasis Type="Italic">Barley yellow dwarf virus</Emphasis>-resistant <Emphasis Type="Italic">Zhong ZH</Emphasis>
and <Emphasis Type="Italic">TC14</Emphasis> wheat lines |
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Authors: | Florian Chain Gérard Riault Maxime Trottet Emmanuel Jacquot |
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Institution: | (1) UMR INRA/Agrocampus-Rennes “Biologie des Organismes et des Populations appliquée à la Protection des Plantes” [UMR BiO3P], BP 35327, Domaine de la Motte, 35653 Le Rheu Cedex, France;(2) UMR INRA/Agrocampus-Rennes “Amélioration des Plantes et Biotechnologies Végétales” [APBV], BP 35327, Domaine de la Motte, 35653 Le Rheu Cedex, France |
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Abstract: | Serial passage experiments (SPE) of a Barley yellow dwarf virus-PAV (BYDV-PAV) isolate were performed on Zhong ZH and TC14 wheat lines to evaluate the durability of their resistance to BYDV. At different passage numbers (from the 2nd to the 114th), biological properties of the produced isolates were recorded either by monitoring infection percentages and virus titers of the first 3 weeks of viral infection or by measuring their impact on yield components. Statistical analyses using the area under pathogen progress curves and the area under concentration progress curves demonstrated that these two resistant lines induce, after only a few passages, a selection of variant(s) with significantly modified infection abilities. Isolates resulting from SPE performed on these lines induced important decreases of yield components. These results indicate that the use of Zhong ZH and TC14 lines in BYDV-resistant breeding programmes should be approached with caution. |
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Keywords: | AUCPC AUPPC Luteovirus resistance-breaking viral titer |
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