Effect of combining two genes for partial resistance to Barley yellow dwarf virus-PAV (BYDV-PAV) derived from Thinopyrum intermedium in wheat

J. Jahier F. Chain Dominique Barloy 1 A.M. Tanguy J. Lemoine G. Riault E. Margale M. Trottet E. Jacquot
1 APBV - Amélioration des Plantes et Biotechnologies Végétales
Abstract : In this study two Sources of resistance to Barley yellow dwarf virus (BYDV), both originating from Thinopyrum intermedium, were combined in a single genotype, line ZT, using GISH (genomic in situ hybridization) and a new molecular marker of the partial resistance gene Bdv2. Susceptible wheat cv. Sunstar, the translocation line TC14 carrying Bdv2, the addition line ZH with the group-2 chromosome arm carrying resistance, and line ZT with both resistances were inoculated with five strains of Barley yellow dwarf virus-PAV. The tests confirmed the resistance of TC14 and ZH and revealed an additive effect of the two sources of resistance in ZT. The resistance of line ZT was characterized by 1 proportion of infected plants significantly lower than the parental lines TC14 and ZH (42% vs. a mean of 76% for the parents) and a very low virus titre (area under the virus concentration progress curve of 1.2 vs. a mean on 6.3 for the parents).
Keywords : chromosome durability GISH introgression molecular marker pyramiding Triticum aestivum red winter-wheat bread wheat aphid transmission sitobion-avenae western france tolerance lines inoculation culture
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Submitted on : Friday, September 7, 2012 - 3:24:12 PM
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AGROCAMPUS-OUEST | UNIV-RENNES1 | UNAM | INRA | UNIV-RENNES | AGROCAMPUS-OUEST-UMR-ESE

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J. Jahier, F. Chain, Dominique Barloy, A.M. Tanguy, J. Lemoine, et al.. Effect of combining two genes for partial resistance to Barley yellow dwarf virus-PAV (BYDV-PAV) derived from Thinopyrum intermedium in wheat. Plant Pathology, Wiley, 2009, 58 (5), pp.807-814. ⟨10.1111/j.1365-3059.2009.02084.x⟩. ⟨hal-00729174⟩

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