. "http://www.isvav.cz/projectDetail.do?rowId=GPP501/10/P483"^^ . . . "Retrotranspozon kolonizuj\u00EDc\u00ED pouze rekombinuj\u00EDc\u00ED \u010D\u00E1st genomu dvoupohlavn\u00EDch rostlin" . "0"^^ . . "Retrotransposon colonizing only recombining part of genome of dioecious plants"@en . . "2014-07-15+02:00"^^ . . . . . . . . . . "3"^^ . "2010-01-01+01:00"^^ . . "0"^^ . "GPP501/10/P483" . . "3"^^ . "sex chromosom LTR retrotransposon transposition RNA interference VLP"@en . "Transponovateln\u00E9 elementy (TE) tvo\u0159\u00ED v\u00FDznamnou \u010D\u00E1st genom\u016F. Evolu\u010Dn\u00ED historie, vz\u00E1jemn\u00E9 interakce TE a interakce TE s\u00A0hostitelem spolu s mechanizmy \u0161\u00ED\u0159en\u00ED jednotliv\u00FDch TE se odr\u00E1\u017Eej\u00ED v rozlo\u017Een\u00ED TE na chromozomech. B\u011Bhem \u0161irok\u00E9 anal\u00FDzy TE u S. latifolia jsme objevili rodinu LTR retrotranspozon\u016F typu gypsy, kter\u00E1 zcela chyb\u00ED v\u00A0nerekombinuj\u00EDc\u00ED \u010D\u00E1sti chromozomu Y, zat\u00EDmco v\u00A0ostatn\u00EDch \u010D\u00E1stech genomu v\u010Detn\u011B pseudoautozom\u00E1ln\u00ED oblasti chromozomu Y (PAR) je zastoupena velmi hojn\u011B a rovnom\u011Brn\u011B. Absence tohoto elementu na chromozomu Y je pravd\u011Bpodobn\u011B zp\u016Fsobena mechanizmem jeho \u0161\u00ED\u0159en\u00ED, kter\u00FD m\u016F\u017Ee b\u00FDt mimo jin\u00E9 zalo\u017Een na rekombinaci. Alternativn\u00EDm vysv\u011Btlen\u00EDm je inhibice transpozice mechanizmem RNA interference, kter\u00E1 je funk\u010Dn\u00ED pouze u sam\u010D\u00EDho pohlav\u00ED. Objasn\u011Bn\u00ED tohoto mechanizmu m\u016F\u017Ee odhalit zaj\u00EDmav\u00E9 souvislosti mezi \u0161\u00ED\u0159en\u00EDm TE u sexu\u00E1ln\u00EDch organizm\u016F na jedn\u00E9 stran\u011B a rekombinac\u00ED, p\u0159\u00EDpadn\u011B RNAi na stran\u011B druh\u00E9." . . "1"^^ . "Large portions of eukaryotic genomes consist of transposable elements (TEs). Chromosomal distribution and abundance of various families of TEs in genomes is affected by many factors such as the mechanisms of spreading, TEs interactions, TEs vs. host interactions or special features of chromosomal regions. During the systematic analysis of the repetitive sequences in S. latifolia genome, gypsy type LTR retrotransposon family was found. This retrotransposon family gives ubiquitous signal on all chromosomes with exception of the non-recombining part of the Y chromosome where signal is absent. The first hypothesis presumes, that this retrotransposon could be spread in the genome in connection with recombination. Alternative explanation is based on RNA interference mechanism inhibiting retrotransposition in males. Identification of this mechanism(s) could shed light on new connections between retrotranspsoson spreading in sexual organisms, recombination and/or RNAi based TE silencing"@en . . .