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Les associations graminées - légumineuses prairiales. Comment sélectionner des variétés pour accroitre leur productivité et faciliter leur conduite ?

Abstract : Grasslands sown with grass – legume mixtures combine agricultural and environmental performances with easy management. These grasslands require genetic progress, progress conducted at the species level. Breeding and evaluation of varieties are mainly conducted in monoculture, which does not for sure allow creating and identifying varieties that perform well in mixture. The choice of varieties to be introduced in a mixture is already guided by the choice of associated species, the soil, climatic and management conditions because some variety characteristics are recovered in mixtures such as the regrowth or flowering earliness, re-heading or disease tolerance. This means that a catalogue of varieties should have a diversity of varieties of each species, for mixtures and monocultures. We report on recent results on lucerne – grass mixtures showing that the ranking of lucerne genotypes or varieties for biomass production is slightly different in mixture and in monoculture. However, biomass production of a mixture mainly resulted in additive effects of the varieties of each species without statistically significant interaction. We therefore propose methods to take into account the performance in mixture for variety breeding and evaluation.
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  • HAL Id : hal-02630846, version 1
  • PRODINRA : 283938

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Bernadette Julier, Gaëtan Louarn, Francois Gastal, Fabien Surault, Jean Paul Sampoux, et al.. Les associations graminées - légumineuses prairiales. Comment sélectionner des variétés pour accroitre leur productivité et faciliter leur conduite ?. Innovations Agronomiques, INRAE, 2014, 40, pp.61-72. ⟨hal-02630846⟩

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