{"id":7379,"date":"2025-11-01T19:37:55","date_gmt":"2025-11-01T19:37:55","guid":{"rendered":"https:\/\/deliry.com\/?p=7379"},"modified":"2026-03-03T06:24:08","modified_gmt":"2026-03-03T06:24:08","slug":"explosion-chromosomique-chez-des-papillons","status":"publish","type":"post","link":"https:\/\/deliry.com\/?p=7379","title":{"rendered":"Record du nombre de chromosomes chez l&rsquo;Azur\u00e9 de l&rsquo;Atlas"},"content":{"rendered":"\n<p>L&rsquo;Azur\u00e9 de l&rsquo;Atlas (<em>Polyommatus (Plebiculus) atlanticus <\/em>(Elwe, 1905)) (nomm\u00e9 Atlas Blue en anglais), d\u00e9tient un record remarquable en poss\u00e9dant un des plus grand nombre de chromosomes parmi les animaux multicellulaires : 2N=458. Bien que ce chiffre ne soit pas le plus \u00e9lev\u00e9 dans le r\u00e8gne vivant, il est unique pour une esp\u00e8ce diplo\u00efde. Ce petit papillon originaire du massif de l&rsquo;Atlas en Afrique du Nord a une structure chromosomique qui a \u00e9t\u00e9 modifi\u00e9e au cours de trois millions d&rsquo;ann\u00e9es, passant de 24 \u00e0 229 paires.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl.jpeg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl.jpeg\" alt=\"\" class=\"wp-image-7382\" style=\"width:640px\" srcset=\"https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl.jpeg 1024w, https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl-300x212.jpeg 300w, https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl-768x543.jpeg 768w, https:\/\/deliry.com\/wp-content\/uploads\/2025\/11\/polatl-120x85.jpeg 120w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">\u00a9\u00a9&nbsp;by &#8211; Mourad Harzallh &#8211; Alg\u00e9rie en mai 2021 &#8211; iNaturalist<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-right\"><strong>NT <\/strong>UICN<\/p>\n\n\n\n<p>Cette esp\u00e8ce est end\u00e9mique de l&rsquo;Afrique du Nord : Maroc et Alg\u00e9rie. Plusieurs sous-esp\u00e8ces sont distingu\u00e9es : <em>Polyommatus atlanticus atlanticus <\/em>(Elwes, 1905) dans le Haut Atlas marocain, <em>P. a. weissi <\/em>Dujardin, 1977 du Moyen Atlas marocain et <em>P. a. barraguei <\/em>Dujardin, 1977 d&rsquo;Alg\u00e9rie dans les Aur\u00e8s. La forme <em>rosea <\/em>a \u00e9t\u00e9 ajout\u00e9e par Tennent en 1994. La premi\u00e8re fr\u00e9quente la zone des steppes d&rsquo;altitude entre 1700 et 3000 m, des secteurs \u00e0 fort enneigement, la seconde occupe des zones plus basses, entre 1300 et 2200 m pour partie foresti\u00e8res. La plante h\u00f4tes est l&rsquo;<em>Anthyllis vulneraria <\/em>ou <em>Anthyllis polycephala<\/em> que le papillon trouve dans des secteurs caillouteux \u00e0 fort ensoleillement. L&rsquo;esp\u00e8ce bivoltine vole en deux g\u00e9n\u00e9rations entre mai-juin et ao\u00fbt. Ce papillon est menac\u00e9, en grand danger dans les secteurs d&rsquo;altitudes \u00e9rod\u00e9s par les ch\u00e8vres domestiques.<\/p>\n\n\n\n<p><strong>Dujardin F. 1977<\/strong> &#8211; Description of two new subspecies of\u00a0<em>Polyommatus atlanticus<\/em>\u00a0(<em>barraguei, Polyommatus atlanticus weissi<\/em>) Elwes with some regrouping in the generic statute of its species.\u00a0&#8211; <em>Entomops<\/em>,\u00a043 : 93-100.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;Azur\u00e9 de l&rsquo;Atlas (Polyommatus (Plebiculus) atlanticus (Elwe, 1905)) (nomm\u00e9 Atlas Blue en anglais), d\u00e9tient un record remarquable en poss\u00e9dant un des plus grand nombre de &hellip; <\/p>\n","protected":false},"author":1,"featured_media":7415,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[475,476,373,311],"tags":[],"class_list":["post-7379","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-afrique-du-nord","category-genetique","category-lepidopteres","category-zz-synchroniser"],"_links":{"self":[{"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/posts\/7379","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deliry.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7379"}],"version-history":[{"count":5,"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/posts\/7379\/revisions"}],"predecessor-version":[{"id":7387,"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/posts\/7379\/revisions\/7387"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deliry.com\/index.php?rest_route=\/wp\/v2\/media\/7415"}],"wp:attachment":[{"href":"https:\/\/deliry.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/deliry.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/deliry.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}