{"id":12162,"date":"2024-06-25T10:01:39","date_gmt":"2024-06-25T10:01:39","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=12162"},"modified":"2024-06-25T10:01:39","modified_gmt":"2024-06-25T10:01:39","slug":"humans-and-neanderthals-interbreeding-evidence-and-controversy","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/anthropology\/humans-and-neanderthals-interbreeding-evidence-and-controversy\/","title":{"rendered":"K\u0159\u00ed\u017eili se lid\u00e9 a neandert\u00e1lci? Z\u00e1hada na\u0161\u00ed minulosti"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Lid\u00e9 a neandert\u00e1lci: K\u0159\u00ed\u017eili se?<\/h2>\n\n<h2 class=\"wp-block-heading\">Genetick\u00e9 d\u016fkazy<\/h2>\n\n<p>V roce 2010 pr\u016flomov\u00fd v\u00fdzkum odhalil, \u017ee lid\u00e9 sd\u00edlej\u00ed 1-4 % sv\u00fdch gen\u016f s neandert\u00e1lci. Tento objev vyvolal v\u00e1\u0161nivou debatu o tom, zda se na\u0161i p\u0159edkov\u00e9 k\u0159\u00ed\u017eili.<\/p>\n\n<h2 class=\"wp-block-heading\">Hypot\u00e9za k\u0159\u00ed\u017een\u00ed<\/h2>\n\n<p>Zast\u00e1nci hypot\u00e9zy k\u0159\u00ed\u017een\u00ed tvrd\u00ed, \u017ee p\u0159\u00edtomnost neandert\u00e1lsk\u00e9 DNA v genomech modern\u00edch lid\u00ed je d\u016fkazem hybridizace. Podle jejich model\u016f by mohl relativn\u011b mal\u00fd po\u010det spojen\u00ed mezi lidmi a neandert\u00e1lci vysv\u011btlit pozorovan\u00e9 genetick\u00e9 p\u0159ekryvy.<\/p>\n\n<h2 class=\"wp-block-heading\">Hypot\u00e9za bez k\u0159\u00ed\u017een\u00ed<\/h2>\n\n<p>Jin\u00ed v\u00fdzkumn\u00edci v\u0161ak tvrd\u00ed, \u017ee genetick\u00e9 podobnosti mezi lidmi a neandert\u00e1lci lze vysv\u011btlit popula\u010dn\u00ed strukturou. P\u0159edpokl\u00e1daj\u00ed, \u017ee neandert\u00e1lsk\u00fd genom nesl genetickou signaturu, kter\u00e1 byla p\u0159\u00edtomna tak\u00e9 ve skupin\u011b p\u0159edmodern\u00edch Afri\u010dan\u016f. Kdy\u017e tato africk\u00e1 populace dala vzniknout modern\u00edm lidem, zd\u011bdili tuto signaturu, co\u017e vedlo ke vzniku neandert\u00e1lsk\u00e9 DNA v modern\u00edch genomech bez nutnosti k\u0159\u00ed\u017een\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Kontrastn\u00ed studie<\/h2>\n\n<p>Dv\u011b ned\u00e1vn\u00e9 studie p\u0159edstavily kontrastn\u00ed pohledy na ot\u00e1zku k\u0159\u00ed\u017een\u00ed. \u010cl\u00e1nek publikovan\u00fd v PNAS nazna\u010duje, \u017ee se lid\u00e9 a neandert\u00e1lci nikdy nek\u0159\u00ed\u017eili, zat\u00edmco jin\u00e1 studie, kter\u00e1 m\u00e1 b\u00fdt zve\u0159ejn\u011bna v PLoS ONE, d\u016frazn\u011b argumentuje ve prosp\u011bch k\u0159\u00ed\u017een\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Studie PNAS<\/h2>\n\n<p>Studie PNAS vytvo\u0159ila model za p\u0159edpokladu, \u017ee africk\u00e1 populace m\u011bla strukturovanou genetickou skladbu. Zjistili, \u017ee tento model mohl p\u0159edpov\u011bd\u011bt sou\u010dasn\u00fd lidsk\u00fd genom bez jak\u00e9hokoli k\u0159\u00ed\u017een\u00ed. Studie v\u0161ak uzn\u00e1v\u00e1, \u017ee k n\u011bjak\u00e9mu k\u0159\u00ed\u017een\u00ed mohlo doj\u00edt, ale \u017ee potomci pravd\u011bpodobn\u011b nebyli \u017eivotaschopn\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Studie PLoS ONE<\/h2>\n\n<p>Studie PLoS ONE naopak tvrd\u00ed, \u017ee ke k\u0159\u00ed\u017een\u00ed do\u0161lo, ale \u017ee bylo nepravideln\u00e9. Jejich model nazna\u010duje, \u017ee pouh\u00fdch 197-430 spojen\u00ed mezi lidmi a neandert\u00e1lci mohlo zav\u00e9st neandert\u00e1lskou DNA do modern\u00edch euroasijsk\u00fdch genom\u016f.<\/p>\n\n<h2 class=\"wp-block-heading\">Interpretace d\u016fkaz\u016f<\/h2>\n\n<p>Interpretace genetick\u00fdch d\u016fkaz\u016f pro k\u0159\u00ed\u017een\u00ed lid\u00ed a neandert\u00e1lc\u016f je n\u00e1ro\u010dn\u00e1. V\u011bdci pracuj\u00ed s k\u0159ehkou a obt\u00ed\u017en\u011b extrahovatelnou DNA a mus\u00ed se spol\u00e9hat na modely, aby vyvodili, jak oba druhy interagovaly.<\/p>\n\n<h2 class=\"wp-block-heading\">Popula\u010dn\u00ed dynamika<\/h2>\n\n<p>Antropolog Chris Stringer nazna\u010duje, \u017ee setk\u00e1n\u00ed lid\u00ed a neandert\u00e1lc\u016f prob\u00edhala ve vln\u00e1ch. V prvn\u00edch vln\u00e1ch by se mal\u00e9 skupiny modern\u00edch lid\u00ed setkaly s velk\u00fdmi skupinami neandert\u00e1lc\u016f. Pozd\u011bj\u0161\u00ed vlny by vedly k obr\u00e1cen\u00e9 situaci.<\/p>\n\n<h2 class=\"wp-block-heading\">Vliv popula\u010dn\u00ed struktury<\/h2>\n\n<p>Popula\u010dn\u00ed struktura m\u016f\u017ee v\u00fdrazn\u011b ovlivnit genetickou anal\u00fdzu. Pokud by r\u016fzn\u00e9 skupiny lid\u00ed \u017eily v izolaci, hromadily by jedine\u010dn\u00e9 genetick\u00e9 signatury. Kdy\u017e by tyto skupiny pozd\u011bji p\u0159i\u0161ly do kontaktu, mohly by b\u00fdt genetick\u00e9 podobnosti mezi nimi nespr\u00e1vn\u011b interpretov\u00e1ny jako d\u016fkaz k\u0159\u00ed\u017een\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Mitochondri\u00e1ln\u00ed DNA<\/h2>\n\n<p>Mitochondri\u00e1ln\u00ed DNA je d\u011bd\u011bna v\u00fdhradn\u011b po matce. Absence neandert\u00e1lsk\u00e9 mitochondri\u00e1ln\u00ed DNA v genomech modern\u00edch lid\u00ed nazna\u010duje, \u017ee p\u0159\u00edpadn\u00ed potomci poch\u00e1zej\u00edc\u00ed z k\u0159\u00ed\u017een\u00ed lid\u00ed a neandert\u00e1lc\u016f pravd\u011bpodobn\u011b nebyli \u017eivotaschopn\u00ed.<\/p>\n\n<h2 class=\"wp-block-heading\">Budouc\u00ed v\u00fdzkum<\/h2>\n\n<p>K \u00fapln\u00e9mu pochopen\u00ed povahy interakc\u00ed \u010dlov\u011bka a neandert\u00e1lce je zapot\u0159eb\u00ed dal\u0161\u00edho v\u00fdzkumu. V\u011bdci pot\u0159ebuj\u00ed l\u00e9pe porozum\u011bt star\u00fdm popula\u010dn\u00edm struktur\u00e1m a tomu, jak ovlivnily genetickou skladbu modern\u00edch lid\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Lid\u00e9 a neandert\u00e1lci: K\u0159\u00ed\u017eili se? Genetick\u00e9 d\u016fkazy V roce 2010 pr\u016flomov\u00fd v\u00fdzkum odhalil, \u017ee lid\u00e9 sd\u00edlej\u00ed 1-4 % sv\u00fdch gen\u016f s neandert\u00e1lci. Tento objev vyvolal v\u00e1\u0161nivou debatu o tom, zda&hellip;<\/p>\n","protected":false},"author":6,"featured_media":23725,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1022],"tags":[3184,188,1018,487,1019,15848],"class_list":["post-12162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anthropology","tag-dna","tag-genetics","tag-interbreeding","tag-human-evolution","tag-neanderthals","tag-population-genetics"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12162"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12162\/revisions"}],"predecessor-version":[{"id":12163,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12162\/revisions\/12163"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/23725"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}