. . " residual sexuality" . "Microevolutionary aspects of residual sexuality in apomictic plants: detection, rate and manifestation in populations of Hieracium subgenus Pilosella"@en . "2015-01-22+01:00"^^ . . "1"^^ . "1"^^ . . . . . . "2007-01-01+01:00"^^ . . . " hybridization" . "2009-04-22+02:00"^^ . . "Mikroevolu\u010Dn\u00ED aspekty zbytkov\u00E9 sexuality apomiktick\u00FDch rostlin: detekce, kvantifikace a projevy v populac\u00EDch jest\u0159\u00E1bn\u00EDk\u016F podrodu Pilosella" . "12"^^ . "12"^^ . . "."@en . " apomixis" . "V\u00FDsledky \u0159e\u0161en\u00ED projektu jsou velmi kvalitn\u00ED a jsou v souladu s p\u016Fvodn\u00EDm n\u00E1vrhem. Zaj\u00EDmav\u00E9 a nov\u00E9 v\u00FDsledky jsou zv\u0159ejneny zejm\u00E9na v oblasti studia zbytkov\u00E9 sexuality apomiktick\u00FDch jest\u0159\u00E1bn\u00EDk\u016F. M\u00EDra zbytkov\u00E9 sexuality fakultativn\u00EDch apomikt\u016F, tj. pod\u00EDl pot"@cs . "http://www.isvav.cz/projectDetail.do?rowId=GA206/07/0059"^^ . . . "Hieracium subgenus Pilosella" . . . "Hieracium subgenus Pilosella; apomixis; residual sexuality; hybridization; microevolution"@en . . . . "\u00A0Facultative apomixis combines usually dominant asexual seed production and occasional hybridization of maternal plants (residual sexuality). Advantages of both apomixis (fixation\u00A0 and spread of adapted genotypes) and sexuality (increase of progeny variation by recombination and segregation) often contribute to invasion of such biotypes to new habitats. Besides sexual biotypes, also facultative apomicts do hybridize (as seed or pollen parents) in our model system of Hieracium subgenus Pilosella. Thus, both recent hybrids and already stabilized hybridogenous taxa occur in nature. The project is aimed at 1) detection and quantification of hybrid progeny of apomitic mothers after experimental crosses and open pollination in the field, and 2) evaluation of progeny variation generated by apomictic versus sexual mothers in selected mixed populations. Comparison to actual population structures in the wild will provide an estimate of establishment of new biotypes originated in the same way and"@en . . "GA206/07/0059" . "Fakultativn\u00ED apomixe kombinuje obvykle p\u0159eva\u017Euj\u00EDc\u00ED asexu\u00E1ln\u00ED semenn\u00E9 rozmno\u017Eov\u00E1n\u00ED s\u00A0p\u0159\u00EDle\u017Eitostnou hybridizac\u00ED mate\u0159sk\u00FDch rostlin (zbytkov\u00E1 sexualita). V\u00FDhody apomixe (udr\u017Eov\u00E1n\u00ED a \u0161\u00ED\u0159en\u00ED adaptovan\u00FDch genotyp\u016F) i sexuality (zvy\u0161ov\u00E1n\u00ED variability potomstvarekombinac\u00ED a segregac\u00ED) \u010Dasto p\u0159isp\u00EDvaj\u00ED k\u00A0invazi t\u011Bchto biotyp\u016F do nov\u00FDch stanovi\u0161\u0165. V modelov\u00E9m syst\u00E9mu jest\u0159\u00E1bn\u00EDk\u016F podrodu Pilosella hybridizuj\u00ED (jako oba rodi\u010De) jak sexu\u00E1ln\u00EDch biotypy, tak i fakultativn\u00ED apomikti. V\u00A0p\u0159\u00EDrod\u011B se tak vyskytuj\u00ED recentn\u00ED hybridi i hybridn\u00ED taxony ji\u017E stabilizovan\u00E9. C\u00EDlem projektu je 1) detekovat a kvantifikovat hybridn\u00ED potomstvo mate\u0159sk\u00FDch apomiktick\u00FDch rostlin po experiment\u00E1ln\u00EDm k\u0159\u00ED\u017Een\u00ED a po voln\u00E9m opylen\u00ED v\u00A0p\u0159\u00EDrod\u011B a 2) zhodnotit prom\u011Bnlivost potomstva apomiktick\u00FDch versus sexu\u00E1ln\u00EDch mate\u0159sk\u00FDch rostlin ve vybran\u00FDch sm\u011Bsn\u00FDch populac\u00EDch. Srovn\u00E1n\u00ED se sou\u010Dasnou strukturou populac\u00ED v\u00A0p\u0159\u00EDrod\u011B umo\u017En\u00ED odhadnout uplatn\u011Bn\u00ED nov\u00FDch biotyp\u016F vznikaj\u00EDc\u00EDch t\u00EDmto zp\u016Fsobem, a objasnit \u00FAlohu p\u0159\u00EDrodn\u00EDho v\u00FDb\u011Bru." . "2009-12-31+01:00"^^ . "0"^^ .