Développement de variétés élites de tomates : reproduction, phénotypage et sélection

Abstract : Tomato (Solanum lycopersicum L.) is the most important vegetable in Europe. During the last decade of selection breeders successfully focused on traits as plant yield, long-shelf-life and disease resistances, nonetheless final consumers are frequently not satisfied regarding the fruit quality and taste. Furthermore, from the breeders’ point of view, the lack of phenotyping platforms, clear key traits that can efficiently identify individuals exhibiting rare and optimal genotypes from large populations is currently one of the major bottlenecks. To facilitate the development of successful tasty tomatoes adapted to the new consumer expectations, a panel of 21 commercial varieties was phenotypically characterized with the use of the FieldBook App with DUS test traits in order to assess the genetic stability of the hybrids. Then, organoleptic properties of each varieties were determined by a sensory analysis: from mature fruits, 27 organoleptic traits were estimated and used to build specific calibrations with a micro-NIR spectrometer. The 12 strong detection models created and the data obtained by the phenotypic characterization are now successful instruments that are helping the breeders for making the right decision regarding the advancement of tasty tomato breeding lines or varieties.
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Master Thesis
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Ophélie Grégoire. Développement de variétés élites de tomates : reproduction, phénotypage et sélection. Sciences du Vivant [q-bio]. 2018. ⟨dumas-01961646⟩

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