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Resistance to Verticillium albo-atrum in lucerne (Medicago sativa L.) to distinguish between varieties



Resistance to Verticillium albo-atrum in lucerne (Medicago sativa L.) to distinguish between varieties



Euphytica 153(1/2): 227-232



France is responsible for DUS (Distinction-Uniformity-Stability) testing of new varieties of lucerne (Medicago sativa L.) for several European countries. Many varieties fail to be registered because of a lack of distinctness from the already registered varieties. The addition of the other traits such as disease or pest resistance could help in distinction. The aim of the present study was to optimize measurement of the resistance of lucerne to Verticillium albo-atrum. Although the resistance to V. albo-atrum is a qualitative trait for each plant, varietal resistance is a continuous variable because each variety contains a variable percentage of resistant plants. Fifty cultivars were tested for V. albo-atrum in two laboratories at random from among five private and public laboratories. Five check varieties were tested in the five laboratories in two tests. A score of resistance, corrected from the effect of the test, was given for each cultivar. A method to validate any new test is proposed. This data set can now be incremented by the resistance scores to V. albo-atrum of new varieties. It will help in distinguishing between lucerne varieties.

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Accession: 012927795

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DOI: 10.1007/s10681-006-9258-5


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