"GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . . "Annals of Botany" . . . . . . . "Fehrer, Judith" . . . "-" . "446629" . . . "P\u0159irozen\u00E1 hybridizace mezi dv\u011Bma allopolyploidn\u00EDmi p\u00FDry (Elitrigie, Poaceae): ekologick\u00E9 a evolu\u010Dn\u00ED aspekty"@cs . . "Recent natural hybridization between two allopolyploid wheatgrasses (Elytrigia, Poaceae): Ecological and evolutionary implications"@en . . "Mahelka, V\u00E1clav" . . "249;260" . "4"^^ . . "[E1E8AC5132C0]" . "Recent natural hybridization between two allopolyploid wheatgrasses (Elytrigia, Poaceae): Ecological and evolutionary implications" . "Jarol\u00EDmov\u00E1, Vlasta" . "In the tribe Triticeae (family Poaceae), ancient hybridisations have produced a multitude of allopolyploid taxa whose origin is rather well-known. However, the role of recent natural hybridisation and introgression under different ecological conditions and the mechanisms generating variability are much less understood. Using molecular and cytological methods we investigated natural hybridisation and gene flow between two predominantly allohexaploid wheatgrasses, weedy Elytrigia repens and steppic E. intermedia, with respect to habitats characterised by different degrees of anthropogenic disturbance. Weedy E. repens was rare in a steppic locality whereas E. intermedia was almost absent at two sites of agricultural land-use. Nevertheless, hybrids were common there whereas none were found at the steppic locality, underlining the importance of different ecological conditions for hybrid formation or establishment. At one highly disturbed site, more than 16% of randomly collected plants were hybrids. He..." . "RIV/67985939:_____/07:00089131!RIV08-AV0-67985939" . "Recent natural hybridization between two allopolyploid wheatgrasses (Elytrigia, Poaceae): Ecological and evolutionary implications"@en . . "4"^^ . "Krahulec, Franti\u0161ek" . "0305-7364" . . "In the tribe Triticeae (family Poaceae), ancient hybridisations have produced a multitude of allopolyploid taxa whose origin is rather well-known. However, the role of recent natural hybridisation and introgression under different ecological conditions and the mechanisms generating variability are much less understood. Using molecular and cytological methods we investigated natural hybridisation and gene flow between two predominantly allohexaploid wheatgrasses, weedy Elytrigia repens and steppic E. intermedia, with respect to habitats characterised by different degrees of anthropogenic disturbance. Weedy E. repens was rare in a steppic locality whereas E. intermedia was almost absent at two sites of agricultural land-use. Nevertheless, hybrids were common there whereas none were found at the steppic locality, underlining the importance of different ecological conditions for hybrid formation or establishment. At one highly disturbed site, more than 16% of randomly collected plants were hybrids. He..."@en . . "P\u0159irozen\u00E1 hybridizace mezi dv\u011Bma allopolyploidn\u00EDmi p\u00FDry (Elitrigie, Poaceae): ekologick\u00E9 a evolu\u010Dn\u00ED aspekty"@cs . . "RIV/67985939:_____/07:00089131" . "P(GA206/05/0778), P(GD206/03/H137), Z(AV0Z60050516)" . "Triticeae; polyploidy; gene flow"@en . "Recent natural hybridization between two allopolyploid wheatgrasses (Elytrigia, Poaceae): Ecological and evolutionary implications" . "Ve skupin\u011B Triticeae (tr\u00E1vy, Poaceae) produkovala star\u00E1 hybridizace mno\u017Estv\u00ED allopolyploidn\u00EDch druh\u016F, jejich\u017E p\u016Fvod je pom\u011Brn\u011B dob\u0159e zn\u00E1m\u00FD. Role sou\u010Dasn\u00E9 hybridizace a introgrese za r\u016Fzn\u00FDch ekologick\u00FDch podm\u00EDnek a mechanismy generuj\u00EDc\u00ED variabilitu nejsou zdaleka tak dob\u0159e zn\u00E1m\u00E9. Pomoc\u00ED molekul\u00E1rn\u00EDch a cytologick\u00FDch metod jsme analyzovali hybridizaci a genov\u00FD tok mezi dv\u011Bma allohexaploidn\u00EDmi p\u00FDry: pleveln\u00FDm druhem Elytrigia repens a stepn\u00EDm Elytrigia intermedia. Byly srovn\u00E1v\u00E1ny vlastnosti stanovi\u0161\u0165 charakterizovan\u00E9 r\u016Fzn\u00FDm stupn\u011Bm naru\u0161en\u00ED lidskou \u010Dinnost\u00ED. Pleveln\u00FD druh E. repens byl vz\u00E1cn\u00FD na stepn\u00EDm stanovi\u0161ti, kde\u017Eto E. intermedia byla vz\u00E1cn\u00E1 na dvou stanovi\u0161t\u00EDch ovlivn\u011Bn\u00FDch zem\u011Bd\u011Blskou \u010Dinnost\u00ED. Zde byly \u010Dast\u00E9 hybridy, kter\u00E9 chyb\u011Bly na stepn\u00ED lokalit\u011B, co\u017E ukazuje na v\u00FDznam rozd\u00EDln\u00FDch podm\u00EDnek p\u0159i uchycen\u00ED hybrid\u016F. Na nejv\u00EDce naru\u0161en\u00E9m stanovi\u0161ti v\u00EDce ne\u017E 16% z n\u00E1hodn\u011B odebran\u00FDch rostlin byly hybridy. Hexaploidn\u00ED rostliny m\u011Bly intermedi\u00E1rn\u00ED velikost genomu ve srovn\u00E1n\u00ED s rodi\u010Di a additivn\u00ED typ ..."@cs . "12"^^ . . "100" . .