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Master Thesis

Amélioration de l'itinéraire technique de la betterave sucrière porte-graines en phase de sélection

Abstract : The vernalisation of the sugar beet seed-bearing is a very known but little mastered process which depends on the genetic material and the environmental factors. In the continuity of the previous years, SESVanderHave set up a trial the objectives of which are to improve our knowledge on the vernalisation and to identify the best parameters of preservation allowing an early lifting. Besides, the station is equipped with new more reliable cold rooms from year 2015. After a preservation in 4-5°C during 5 months in drilled bags, the resumption and the flowering of most of the hybrid genotypes are similar to those of the standard modality, the vernalisation of which is natural. The treatment in 1-2°C during 2 months is compatible with the strongest hybrids. A short preservation in 4-5°C is preferable for the most sensitive genotypes, for the greater part of the lines. The results also show that the lower temperatures in 3°C allow the vernalisation.The important residual variance of the statistical test requires improvements proposed in two trials. These ones should allow to generalize new thermal ways in the production conditions and to complete our knowledge on the vernalisation in 1-2°C. In the future, the experimental plans will have to take into account the gradient of fertility of the plots and contain more repetitions grouped in blocks. Besides, factors will be separately studied.
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Master Thesis
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Submitted on : Friday, October 16, 2015 - 9:54:19 AM
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  • HAL Id : dumas-01216323, version 1

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Camille Chastang. Amélioration de l'itinéraire technique de la betterave sucrière porte-graines en phase de sélection. Sciences agricoles. 2015. ⟨dumas-01216323⟩

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