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Master Thesis

Studying genetic control fo partial resistance to Aphanomyces cochlioides (Drech) in Sugar-Beet (Beta vulgaris L.)

Abstract : Aphanomyces cochlioides is a fungus whose incidence is rapidly increasing in sugar beet crops. It causes root damage and yield loss in the USA, China and increasingly in eastern Europe. This is a very unpredictable disease. Trying to control it is an important issue and breeding for resistance is the most probable route to a solution. To learn more about the genetic control of the disease, a linkage analysis of QTL was performed. Previous assays made by SESVanderHave were used as a starting point and QTLs were found on chromosomes 4 and 6. However the phenotyping techniques were not well adapted and the development of a suitable bioassay had to be made prior to the QTL analysis. In the present work, new methods were developed but the results showed no correlation with those of the conventional technique, despite a good discrimination of the controls. The fine mapping assay detected a QTL on chromosome 1. These results are of an interest to use in resistance breeding in sugar beet.
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Master Thesis
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Submitted on : Tuesday, April 22, 2014 - 11:37:07 AM
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Mathilde Liorzou. Studying genetic control fo partial resistance to Aphanomyces cochlioides (Drech) in Sugar-Beet (Beta vulgaris L.). Sciences agricoles. 2013. ⟨dumas-00981445⟩

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