Effect on water deficit on tomato fruit quality - Genetic variability of the fruit response
| Autor: | Bertin, Nadia, Brunel, Beatrice, Bonnefoi, Julien, Petrović, Ivana, Causse, Mathilde |
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| Přispěvatelé: | Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH), Institut National de la Recherche Agronomique (INRA), Gautier semences, Faculty of Agriculture, Université nationale du Rwanda, Génétique et Amélioration des Fruits et Légumes (GAFL), Unité de recherche Génétique et amélioration des fruits et légumes (GALF) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | 3. International Symposium on Horticulture in Europe, SHE2016 3. International Symposium on Horticulture in Europe, SHE2016, Oct 2016, Chania, Greece. 2016 3. International Symposium on Horticulture in Europe, SHE2016, Oct 2016, Chania Greece. 2016 |
| Popis: | Water deficit is known to improve fleshy fruit quality at the expense of yield. However in tornato, recentstudies showed that such effects are highly dependent on genotypes. Thus, breeding tomato plants adaptedto grow under limited water supply requires a better understanding of the effects of WD on fruit quality andtheir genetic variability. ln the present work, four experiments have been performed under greenhouseconditions on the 8 parents of the Multi-Parent Advanced Generation Inter-Cross population which offers thelargest allelic variability observed in tomato. Moderate and intensive WDs have been applied during thewhole period of fruit development The experiments were performed either in spring or in autumn toanalyze the interactions between WD and season. Moreover, interaction between moderate WD and plantfruit load was measured in spring. Fruit quality was assessed through fresh and dry masses, and fruitcomposition (soluble sugars, organic acids, vitamin C, carotenoids). Results show that fruit fresh mass isreduced p,roportionally to WD intensity, whereas the % dry mass is increased. Big fruit size genotypes aremuch more sensitive to WD than small fruit size genotypes. The improvement of fruit taste, based on theincrease of the sugar:acid ratio, resulted more from concentration effects than from metabolic trigger effects.Trade-offs between fruit size decrease and quality improvement allowed discriminating the 8 accessions fortheir genetic interest under water limited conditions. |
| Databáze: | OpenAIRE |
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