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Identifying epidemiological predictors for quantitative host plant resistance : application to the sunflower-phoma pathosystem

Schwanck, André. Identifying epidemiological predictors for quantitative host plant resistance : application to the sunflower-phoma pathosystem. PhD, Agrosystèmes, Écosystèmes et Environnement, Institut National Polytechnique de Toulouse, 2016

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Abstract

Phoma black stem (BS) is caused by the fungus Leptosphaeria lindquistii, and is an important disease in France. The study presented in this dissertation provides useful information on BS epidemiology and sunflower quantitative resistance against the disease. Experiments were conducted on plants grown in small plots (field), adult plants (greenhouse), and seedlings (growth chamber) in order to (1) characterize the spatiotemporal dynamics of BS, (2) identify morphological traits affecting BS through disease escape processes and utilizing a standardised disease assessment procedure, and (3) identify predictors of quantitative resistance to BS. This study suggests that (1) BS is primarily associated to monocyclic epidemics in south west France, (2) low BS levels are associated with sunflower plants characterized by a large number of green leaves and large height, and (3) predictors of quantitative resistance to BS can be experimentally identified.

Item Type:PhD Thesis
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Laboratory name:
Research Director:
Willocquet, Laetitia
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Deposited By: Thèse INPT
Deposited On:20 Jun 2016 14:07

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