Summary
The variety Roazon possesses genes for resistance to eyespot including that on the 7D chromosome transferred from Aegilops ventricosa. In order to assess the level of resistance due to the latter, we developed the intervarietal substitution for the 7D chromosome of ‘Roazon’ into ‘Courtot’ which is very susceptible to eyespot. As ‘Roazon’ contains Aegilops ventricosa cytoplasm, the substitution lines were produced both with wheat and Aegilops cytoplasm. Resistance was assessed at the seedling and the adult plant stage. No cytoplasmic effect was observed. The substitution lines were as resistant as ‘Roazon’. This shows that the chromosome 7D genes for resistance introduced from Aegilops ventricosa result in a high level of resistance in wheat.
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Jahier, J., Tanguy, A.M. & Doussinault, G. Analysis of the level of eyespot resistance due to genes transferred to wheat from Aegilops ventricosa . Euphytica 44, 55–59 (1989). https://doi.org/10.1007/BF00022599
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DOI: https://doi.org/10.1007/BF00022599