{"id":31425,"date":"2026-07-15T14:11:24","date_gmt":"2026-07-15T12:11:24","guid":{"rendered":"https:\/\/www.plantedforests.org\/?p=31425"},"modified":"2026-07-17T12:57:53","modified_gmt":"2026-07-17T10:57:53","slug":"an-update-on-new-zealand-exotic-forests-planted-radiata-pine","status":"publish","type":"post","link":"https:\/\/www.plantedforests.org\/fr\/an-update-on-new-zealand-exotic-forests-planted-radiata-pine\/","title":{"rendered":"Le point sur les for\u00eats exotiques de Nouvelle-Z\u00e9lande &#8211; pin radiata plant\u00e9"},"content":{"rendered":"\n<p class=\"has-black-color has-text-color has-link-color wp-elements-2ed9c6c416242ded9ae00d0c30fe80aa wp-block-paragraph\">Apr\u00e8s le <a href=\"https:\/\/www.plantedforests.org\/webinars-replays\/22-05-2025-genetic-resources-and-short-rotation-forestry-complexity\/\">r\u00e9cent webinaire<\/a> organis\u00e9 par l&rsquo;IEFC et le nouveau groupe de travail sur la complexit\u00e9 des peuplements dans les for\u00eats plant\u00e9es, en collaboration avec l&rsquo;unit\u00e9 de recherche 1.03.00 \u2013 Foresterie \u00e0 rotation courte (SRF) de l&rsquo;IUFRO, il \u00e9tait n\u00e9cessaire de faire le point sur l&rsquo;\u00e9tat de la diversit\u00e9 intra-sp\u00e9cifique des for\u00eats plant\u00e9es afin de clarifier la mani\u00e8re dont les for\u00eats exotiques plant\u00e9es de Nouvelle-Z\u00e9lande sont g\u00e9r\u00e9es. <em>Pinus radiata<\/em>, ou pin radiata, est une esp\u00e8ce d&rsquo;arbre exotique introduite qui repr\u00e9sente environ 90 % des for\u00eats plant\u00e9es en Nouvelle-Z\u00e9lande. Si les s\u00e9lections g\u00e9n\u00e9tiques les plus performantes sont utilis\u00e9es comme clones, la diversit\u00e9 intra-esp\u00e8ce reste une priorit\u00e9. En effet, la bios\u00e9curit\u00e9 et le risque que des ravageurs ou des maladies perturbent le patrimoine forestier plant\u00e9 sont des facteurs essentiels dans la gestion de nos for\u00eats.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-ad75692844c7ce4ebfbaf28440e914a5 wp-block-paragraph\">La Nouvelle-Z\u00e9lande a une longue tradition de gestion de la diversit\u00e9 g\u00e9n\u00e9tique. Entre 1971 et 1985, environ 36 g\u00e9notypes parentaux ont contribu\u00e9 \u00e0 la cr\u00e9ation d&rsquo;environ 28 % des ressources foresti\u00e8res plant\u00e9es existantes, et 20 % suppl\u00e9mentaires ont \u00e9t\u00e9 cr\u00e9\u00e9s \u00e0 partir de vergers \u00e0 graines issus de 120 g\u00e9notypes parentaux test\u00e9s entre 1985 et 1993 (Carson 1997). Cette pratique s&rsquo;est poursuivie, l&rsquo;av\u00e8nement de la sylviculture clonale ne repr\u00e9sentant qu&rsquo;une petite partie de la for\u00eat par rapport \u00e0 la sylviculture par semis (Sorensson et Shelbourne 2004). Depuis lors, les principes de diversit\u00e9 intra-esp\u00e8ce sont rest\u00e9s tr\u00e8s conservateurs. Les vergers \u00e0 graines n\u00e9o-z\u00e9landais ont toujours respect\u00e9, mais surtout d\u00e9pass\u00e9, la directive minimale de 20 g\u00e9notypes non apparent\u00e9s (Lindgren et Prescher 2005). Il s&rsquo;agit d&rsquo;une r\u00e9f\u00e9rence qui refl\u00e8te les meilleures pratiques internationales.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2560\" height=\"1920\" src=\"https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-scaled.jpg\" alt=\"\" class=\"wp-image-31433\" style=\"aspect-ratio:1.5315300528509996\" srcset=\"https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-scaled.jpg 2560w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-300x225.jpg 300w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-1024x768.jpg 1024w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-150x113.jpg 150w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-768x576.jpg 768w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-1536x1152.jpg 1536w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-2048x1536.jpg 2048w, https:\/\/www.plantedforests.org\/wp-content\/uploads\/2026\/07\/Image-control-pollinated-radaiata-pine-1320x990.jpg 1320w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-ef4b8caa1cc918da895e9347865c9366 wp-block-paragraph\"><em><strong><em><em>Verger de pins radiata \u00e0 pollinisation contr\u00f4l\u00e9e en Nouvelle-Z\u00e9lande<\/em><\/em><\/strong><\/em><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-963c0ff558e12db8ba524e2bc8ea3a08 wp-block-paragraph\">Aujourd&rsquo;hui, <strong>la s\u00e9lection du pin radiata est g\u00e9r\u00e9e par la Radiata Pine Breeding Company<\/strong> (<a href=\"https:\/\/rpbc.co.nz\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/rpbc.co.nz<\/a>). La conservation de la diversit\u00e9 g\u00e9n\u00e9tique est une strat\u00e9gie fondamentale pour l&rsquo;entreprise, qui dispose de cinq sites de conservation g\u00e9n\u00e9tique r\u00e9parties dans diff\u00e9rentes r\u00e9gions de Nouvelle-Z\u00e9lande. Ces conservatoires garantissent la disponibilit\u00e9 d&rsquo;un large pool g\u00e9n\u00e9tique pour la s\u00e9lection et le d\u00e9ploiement lorsque cela est n\u00e9cessaire.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-b345220cf71fa5d8bd07dab53e03fb4c wp-block-paragraph\">En 2024, les donn\u00e9es d&rsquo;une <strong>enqu\u00eate nationale sur les p\u00e9pini\u00e8res<\/strong> ont indiqu\u00e9 qu&rsquo;environ 89 % des pins radiata plant\u00e9s proviennent de semis cultiv\u00e9s en plein champ et environ 11 % de semis en conteneurs (ce qui inclut les boutures\/clones). En bref, les plantations foresti\u00e8res de Nouvelle-Z\u00e9lande conservent une diversit\u00e9 g\u00e9n\u00e9tique forte malgr\u00e9 les programmes de s\u00e9lection et l\u2019existence de quelques clones.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-14ccaf48a22ab3afb5139fbbc264f17f wp-block-paragraph\"><em>Pour plus d&rsquo;informations sur la g\u00e9n\u00e9tique et la s\u00e9lection du pin radiata, consultez le site de la Radiata Pine Breeding Company \u00e0 l&rsquo;adresse <\/em><a href=\"https:\/\/rpbc.co.nz\/\" target=\"_blank\" rel=\"noreferrer noopener\"><em>rpbc.co.nz<\/em><\/a><em>.<\/em><\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-3f350bd46dc9897e6cf54a24fe97d281 wp-block-paragraph\" style=\"color:#006633\"><em><em><em><strong>Heidi Dungey, Natalie Graham &amp; Grahame Stovold<\/strong><\/em><\/em><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><br><strong><strong>Lectures recommand\u00e9es :<\/strong><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aimers (2024). Examen de la qualit\u00e9 et du rendement des plants. Rapport de recherche des producteurs forestiers n\u00b0 PSP-TR005. 65 p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">https:\/\/fgr.nz\/wp-content\/uploads\/2024\/10\/PSP-TR005-Review-of-Planting-Stock-Quality-Performance-JAimers.pdf?utm_source=chatgpt.com Bayne, K. (2021).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Covid-19 : Prolongation de la saison de plantation &#8211; Enqu\u00eate aupr\u00e8s de l&rsquo;industrie. (2022\/08). Rotorua : Scion\/Te Uru R\u0101kau &#8211; Service forestier n\u00e9o-z\u00e9landais. https:\/\/www.mpi.govt.nz\/dmsdocument\/51610-Results-of the-industry-survey-on-extending-the-planting-season.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Carson (1997). Recherche du FRI sur la diversit\u00e9 g\u00e9n\u00e9tique en tant que composante de la biodiversit\u00e9 des for\u00eats. NZ Forestry : 14-16.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lindgren, D. et Prescher, F. (2005). Nombre optimal de clones pour les vergers \u00e0 graines avec des clones test\u00e9s. Silvae Genetica 54 : 80-92.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sorensson, C. T. et Shelbourne, C. J. A. (2004). Sylviculture clonale. Chapitre 11, S\u00e9lection et g\u00e9n\u00e9tique des arbres en Nouvelle-Z\u00e9lande. Springer en ligne 2019. Pp 97-106.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Apr\u00e8s le r\u00e9cent webinaire organis\u00e9 par l&rsquo;IEFC et le nouveau groupe de travail sur la complexit\u00e9 des peuplements dans les for\u00eats plant\u00e9es, en collaboration avec l&rsquo;unit\u00e9 de recherche 1.03.00 \u2013 [&hellip;]<\/p>\n","protected":false},"author":101,"featured_media":31433,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"federated","footnotes":""},"categories":[27],"tags":[],"class_list":["post-31425","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iefc-newsletter"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"fr","enabled_languages":["gb","fr","pt","es"],"languages":{"gb":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"es":{"title":true,"content":true,"excerpt":false}}},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - 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