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Results from a joined Polish–French network of progeny trials with European larch

Abstract : Open pollinated seed from selected trees were jointly collected by IBL and INRA in native stands of Larix decidua ‘polonica’ in Swietokrzyskie Mont. in 1987. From this collection a network of progeny trials was set up. Altogeth er 157 progenies were collected and shared among France, Poland and Belgium. Eight progeny trials (4 in France, 2 in Poland and 2 in Belgium) were established in the nineties. The aim of the experiment was to investigate genetic variability at the stand and progeny levels and the behaviour of the half sib families in various environmental conditions. Network aim was also to study the possibilities of long-distance seed transfer in ecologically contrasting environments. The growth and architecture of trees (stem form and branch angle) were recorded ten years after planting in the field. Polish sites were better in growth than the Western European sites. In contrast, stem form was on average slightly worse in Polish conditions compared to French and Belgian sites. In France, polonica larch suffered on some sites from several defects connected to growth (drought cracks), sensitivity to wind storm and to Meria laricina. Compared to sudetan larch and hybrid larch controls from seed orchards, polonica larch looked in Belgium on average less good for both growth and stem form. In France, polish larch competed well with other European larch origins (sudetan, alpine) or species (Japanese and hybrid larch) except with some of the best commercial varieties of hybrid larch. It is shown that a high genetic variability exists in network trials for all traits, offering large possibilities for genetic improvement and high genetic gains. This study indicates seed transfer possibilities across Europe, but GxE interaction exists. A detailed study will be required to take into account ecological data of the trial sites.
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  • HAL Id : hal-02738762, version 1
  • PRODINRA : 355941

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Luc Pâques, Jan Kowalczyk. Results from a joined Polish–French network of progeny trials with European larch. Forest Tree Breeding Conference. IUFRO 2014, Aug 2014, Prague, Czech Republic. ⟨hal-02738762⟩

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