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Une nouvelle variété de mélèze hybride bientôt disponible au reboisement : Les Barres-F2

Abstract : Most of the European Forest Reproductive Materials of hybrid larch (Larix x eurolepis) used in reforestation are produced in 1st generation seed orchards composed of clones of European and Japanese larch (L. decidua and L. kaempferi). Considering the technical and economical problems encountered by seed orchard managers for the mass-production of F1-seeds, second generation seed orchards composed of hybrids and therefore producing F2-seeds might offer an interesting alternative. Such an orchard was planted in France (Domaine des Barres) in 1993. The first crops have been used to establish 4 progeny trials along a climatic gradient between 250 m and 1100 m of elevation in order to assess the genetic value of the 28 clones of the orchard and thus the performance of the new variety. At the age of 11-12 years (since sowing), F2-hybrids had good survival and very straight stems. For stem form, F2-hybrids were at the same level as the best F1-hybrids and clearly superior to European and Japanese larches. However, F2-hybrids also proved to be less vigorous than F1-hybrids though at the level of the best parental species. Considering these results, the seed orchard has been registered in the Qualified category in the national record of Basic Materials and a first commercial crop was organised in autumn 2018.
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https://hal.inrae.fr/hal-02610331
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Submitted on : Saturday, May 16, 2020 - 7:38:59 PM
Last modification on : Wednesday, November 17, 2021 - 2:52:04 PM

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  • HAL Id : hal-02610331, version 1
  • IRSTEA : PUB00064457

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L.E. Pâques, Dominique Veisse, S. Matz, Gwenaël Philippe. Une nouvelle variété de mélèze hybride bientôt disponible au reboisement : Les Barres-F2. Forêt Entreprise, Forêt Privée Française, 2020, pp.54-59. ⟨hal-02610331⟩

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