{"id":34410,"date":"2021-09-10T11:45:36","date_gmt":"2021-09-10T09:45:36","guid":{"rendered":"https:\/\/foretnature.be\/resume-foret-mail\/les-caracteres-hereditaires-peuvent-sauter-de-nombreuses-generations\/"},"modified":"2021-09-10T11:45:36","modified_gmt":"2021-09-10T09:45:36","slug":"les-caracteres-hereditaires-peuvent-sauter-de-nombreuses-generations","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/les-caracteres-hereditaires-peuvent-sauter-de-nombreuses-generations\/","title":{"rendered":"Les caract\u00e8res h\u00e9r\u00e9ditaires peuvent sauter de nombreuses g\u00e9n\u00e9rations"},"content":{"rendered":"

\u00ab Des scientifiques ont d\u00e9couvert que certaines esp\u00e8ces peuvent \u00e9voluer \u00e0 une vitesse surprenante quand de tr\u00e8s anciennes variantes g\u00e9n\u00e9tiques, autrefois utiles, se \u00ab\u00a0r\u00e9veillent\u00a0\u00bb sous la pression s\u00e9lective \u00bb.
\nG\u00e9n\u00e9ralement, l\u2019\u00e9volution des esp\u00e8ces se d\u00e9roule extr\u00eamement lentement faisant craindre, dans ce contexte de changements climatiques tr\u00e8s rapides, que certaines d\u2019entre elles s\u2019\u00e9teignent avant d\u2019avoir r\u00e9ussi \u00e0 s\u2019adapter.
\nPourtant, certaines d\u2019entre elles, et c\u2019est le cas du petit carabe Pogonus chalceus, s\u2019adaptent \u00e0 une vitesse ultra rapide en mobilisant des g\u00eanes, apparus par exemple\u00a0lors de la derni\u00e8re glaciation (200 000 ans), dans un contexte o\u00f9 des conditions environnementales rudes ont contraint\u00a0ces insectes \u00e0 s\u2019adapter. Les g\u00e8nes dormants, r\u00e9veill\u00e9s par de brusques changements des conditions climatiques, quelques centaines de milliers d\u2019ann\u00e9es plus tard, permettent \u00e0 la s\u00e9lection naturelle de mener tr\u00e8s rapidement une population \u00e0 s\u2019adapter \u00e0 ces nouvelles conditions environnementales.
\n\u00ab Tout \u00eatre vivant h\u00e9rite d\u2019une grande bo\u00eete \u00e0 outils qui passe de g\u00e9n\u00e9ration en g\u00e9n\u00e9ration. Celle-ci contient nombre de vieux outils, qui ont \u00e9t\u00e9 fort utiles \u00e0 une certaine \u00e9poque et ne le sont plus aujourd\u2019hui. Mais, ils peuvent le redevenir et m\u00eame \u00eatre d\u2019un int\u00e9r\u00eat vital. \u00bb
\nR. Verbeke. Institut royal des Sciences Naturelles de Belgique,\u00a004\/12\/18.
\nS. M. Van Belleghem , C. Vangestel, K. De Wolf, Z. De Corte, M. M\u00f6st, P. Rastas, L. De Meester, F. Hendrickx (2018). Evolution at two time frames: Polymorphisms from an ancient singular divergence event fuel contemporary parallel evolution. Plos Genetics, Doi : 10.1371\/journal.pgen.1007796.<\/p>","protected":false},"excerpt":{"rendered":"

\u00ab Des scientifiques ont d\u00e9couvert que certaines esp\u00e8ces peuvent \u00e9voluer \u00e0 une vitesse surprenante quand de tr\u00e8s anciennes variantes g\u00e9n\u00e9tiques, autrefois utiles, se \u00ab\u00a0r\u00e9veillent\u00a0\u00bb sous la pression s\u00e9lective \u00bb. G\u00e9n\u00e9ralement, l\u2019\u00e9volution des esp\u00e8ces se d\u00e9roule extr\u00eamement lentement faisant craindre, dans ce contexte de changements climatiques tr\u00e8s rapides, que certaines d\u2019entre elles s\u2019\u00e9teignent avant d\u2019avoir r\u00e9ussi […]<\/p>","protected":false},"featured_media":0,"template":"","categories":[50],"acf":[],"yoast_head":"\nLes caract\u00e8res h\u00e9r\u00e9ditaires peuvent sauter de nombreuses g\u00e9n\u00e9rations - For\u00eat.Nature<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/foretnature.be\/en\/resume-foret-mail\/les-caracteres-hereditaires-peuvent-sauter-de-nombreuses-generations\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les caract\u00e8res h\u00e9r\u00e9ditaires peuvent sauter de nombreuses g\u00e9n\u00e9rations - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"\u00ab Des scientifiques ont d\u00e9couvert que certaines esp\u00e8ces peuvent \u00e9voluer \u00e0 une vitesse surprenante quand de tr\u00e8s anciennes variantes g\u00e9n\u00e9tiques, autrefois utiles, se \u00ab\u00a0r\u00e9veillent\u00a0\u00bb sous la pression s\u00e9lective \u00bb. 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