{"id":12495,"date":"2026-06-24T07:36:45","date_gmt":"2026-06-24T06:36:45","guid":{"rendered":"https:\/\/semexpkbb.com\/?p=12495"},"modified":"2026-06-24T07:42:10","modified_gmt":"2026-06-24T06:42:10","slug":"termeszetes-szelekcio-mukodesben-130-ev-emberi-befolyas-nelkul","status":"publish","type":"post","link":"https:\/\/semexpkbb.com\/hu\/termeszetes-szelekcio-mukodesben-130-ev-emberi-befolyas-nelkul\/","title":{"rendered":"Term\u00e9szetes szelekci\u00f3 m\u0171k\u00f6d\u00e9sben: 130 \u00e9v emberi befoly\u00e1s n\u00e9lk\u00fcl"},"content":{"rendered":"<p>1871-ben mind\u00f6ssze \u00f6t teh\u00e9n maradt Amszterdam sziget\u00e9n, az Indiai-\u00f3ce\u00e1n d\u00e9li r\u00e9sz\u00e9n. Emberi seg\u00edts\u00e9g, \u00e1llatorvosi v\u00e9delem, tervezett p\u00e1rz\u00e1s \u00e9s szelekci\u00f3 n\u00e9lk\u00fcl ezek az \u00e1llatok a k\u00f6vetkez\u0151 130 \u00e9vben k\u00f6zel 2000 egyedb\u0151l \u00e1ll\u00f3 popul\u00e1ci\u00f3t hoztak l\u00e9tre.<\/p>\n<p><!--more--><\/p>\n<p>Genetikai kutat\u00e1sok kimutatt\u00e1k, hogy a tehenek a term\u00e9szetes szelekci\u00f3nak k\u00f6sz\u00f6nhet\u0151en maradtak fenn, amely a zord \u00e9letk\u00f6r\u00fclm\u00e9nyekhez legjobban alkalmazkod\u00f3 egyedeket r\u00e9szes\u00edtette el\u0151nyben. Id\u0151vel a popul\u00e1ci\u00f3 olyan tulajdons\u00e1gokat fejlesztett ki, amelyek lehet\u0151v\u00e9 tett\u00e9k sz\u00e1m\u00e1ra a sikeres t\u00fal\u00e9l\u00e9st \u00e9s szaporod\u00e1st elszigetelt k\u00f6rnyezetben.<\/p>\n<p>K\u00fcl\u00f6n\u00f6sen \u00e9rdekes, hogy az alap\u00edt\u00f3k kis sz\u00e1ma ellen\u00e9re a belteny\u00e9szt\u00e9s miatti v\u00e1rhat\u00f3 genetikai \u00f6sszeoml\u00e1s nem k\u00f6vetkezett be. A tud\u00f3sok \u00fagy v\u00e9lik, hogy a term\u00e9szetes szelekci\u00f3 a k\u00e1ros genetikai kombin\u00e1ci\u00f3k nagy r\u00e9sz\u00e9t kik\u00fcsz\u00f6b\u00f6lte, lehet\u0151v\u00e9 t\u00e9ve a popul\u00e1ci\u00f3 sz\u00e1m\u00e1ra, hogy t\u00f6bb mint egy \u00e9vsz\u00e1zadon \u00e1t fennmaradjon emberi befoly\u00e1s n\u00e9lk\u00fcl.<\/p>\n<p>Azok sz\u00e1m\u00e1ra, akik a h\u00e1zi\u00e1llatok genetik\u00e1j\u00e1val \u00e9s szelekci\u00f3j\u00e1val foglalkoznak, ez a p\u00e9lda egyfajta term\u00e9szetes k\u00eds\u00e9rletet jelent. M\u00edg a modern teny\u00e9szt\u00e9si programok a genetikai fejl\u0151d\u00e9s felgyors\u00edt\u00e1s\u00e1ra t\u00f6rekszenek a tejtermel\u00e9s, a h\u00fas vagy a funkcion\u00e1lis tulajdons\u00e1gok szempontj\u00e1b\u00f3l legjobb egyedek kiv\u00e1laszt\u00e1s\u00e1val, Amszterdam sziget\u00e9n az egyetlen krit\u00e9rium a t\u00fal\u00e9l\u00e9s volt. Azok a tehenek, amelyek nem voltak kell\u0151en alkalmazkodva, egyszer\u0171en nem hoztak l\u00e9tre ut\u00f3dokat.<\/p>\n<p>Ez az eset a popul\u00e1ci\u00f3k genetikai sokf\u00e9les\u00e9g\u00e9nek fontoss\u00e1g\u00e1ra is eml\u00e9keztet minket. B\u00e1r ma a gyors genetikai fejl\u0151d\u00e9sre t\u00f6reksz\u00fcnk, a kell\u0151en sz\u00e9les genetikai b\u00e1zis meg\u0151rz\u00e9se tov\u00e1bbra is minden komoly szelekci\u00f3s program egyik kulcsfontoss\u00e1g\u00fa feladata. Pontosan az intenz\u00edv szelekci\u00f3 \u00e9s a genetikai v\u00e1ltozatoss\u00e1g meg\u0151rz\u00e9se k\u00f6z\u00f6tti egyens\u00faly teszi lehet\u0151v\u00e9 a popul\u00e1ci\u00f3 hossz\u00fa t\u00e1v\u00fa fejl\u0151d\u00e9s\u00e9t \u00e9s fenntarthat\u00f3s\u00e1g\u00e1t.<\/p>\n<p>Ez az egyed\u00fcl\u00e1ll\u00f3 p\u00e9lda j\u00f3l mutatja a term\u00e9szetes szelekci\u00f3 erej\u00e9t, \u00e9s azt, hogy egy popul\u00e1ci\u00f3 milyen gyorsan k\u00e9pes alkalmazkodni az \u00faj k\u00f6r\u00fclm\u00e9nyekhez, ha a t\u00fal\u00e9l\u00e9se kiz\u00e1r\u00f3lag a term\u00e9szetre van b\u00edzva.<\/p>\n<p>Forr\u00e1s: <a href=\"https:\/\/nportal.novosti.rs\/vest\/132234\/vesti\/planeta\/ostavio-5-krava-na-ostrvu-posle-130-godina-naucnici-u-soku\" target=\"_blank\" rel=\"noopener\">Nportal &#8211; 5 tehenet hagytak a szigeten: 130 \u00e9v ut\u00e1n a tud\u00f3sok sokkos \u00e1llapotban vannak<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1871-ben mind\u00f6ssze \u00f6t teh\u00e9n maradt Amszterdam sziget\u00e9n, az Indiai-\u00f3ce\u00e1n d\u00e9li r\u00e9sz\u00e9n. Emberi seg\u00edts\u00e9g, \u00e1llatorvosi v\u00e9delem, tervezett p\u00e1rz\u00e1s \u00e9s szelekci\u00f3 n\u00e9lk\u00fcl ezek az \u00e1llatok a k\u00f6vetkez\u0151 130 \u00e9vben k\u00f6zel 2000 egyedb\u0151l \u00e1ll\u00f3 popul\u00e1ci\u00f3t hoztak l\u00e9tre.<\/p>\n","protected":false},"author":1,"featured_media":12493,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-12495","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-bikakrol"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"1871-ben mind\u00f6ssze \u00f6t teh\u00e9n maradt Amszterdam sziget\u00e9n, az Indiai-\u00f3ce\u00e1n d\u00e9li r\u00e9sz\u00e9n. 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