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| rdf:type
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| Description
| - Pollen viability was analysed causally between and within Central European Cirsium species and their hybrids to determine (i) how frequently hybrids are fertile and produce viable pollen; (ii) how the pollen viability of hybrids and their parents are related and how this is affected by the genetic distance between parents; (iii) how species promiscuity relates to species pollen viability; (iv) to what extent the pollen viability of a hybrid may predetermine its frequency in nature; (v) how the pollen viability of a hybrid and sympatricity of its parental species are related; and (vii) how the frequency of females in populations of gynodioecious species may affect the observed pollen viability. The pollen viability of a hybrid generally decreased with increasing genetic distance between the parents and when the parental species had lower pollen viability. The pollen viability was decreased in frequently hybridizing species where occasionally individuals of pure species morphology may show decreased pollen viability. In some instances these might represent some unrecognized hybrid backcrosses. In populations of gynodioecious species where females co-occurred, pollen viability (in hermaphrodites)was also lower, indicating some degree of inbreeding depression. Hybrids between sympatric species exhibited higher post-pollination isolation (decrease of pollen viability), which suggests that the reproductive isolation had been increased by natural selection (effect similar to the Wallace effect). The strength of the postzygotic barrier (based on pollen viability) was generally stronger than that of the prezygotic barrier (based on distribution overlap) in studied hybridizing species pairs.
- Pollen viability was analysed causally between and within Central European Cirsium species and their hybrids to determine (i) how frequently hybrids are fertile and produce viable pollen; (ii) how the pollen viability of hybrids and their parents are related and how this is affected by the genetic distance between parents; (iii) how species promiscuity relates to species pollen viability; (iv) to what extent the pollen viability of a hybrid may predetermine its frequency in nature; (v) how the pollen viability of a hybrid and sympatricity of its parental species are related; and (vii) how the frequency of females in populations of gynodioecious species may affect the observed pollen viability. The pollen viability of a hybrid generally decreased with increasing genetic distance between the parents and when the parental species had lower pollen viability. The pollen viability was decreased in frequently hybridizing species where occasionally individuals of pure species morphology may show decreased pollen viability. In some instances these might represent some unrecognized hybrid backcrosses. In populations of gynodioecious species where females co-occurred, pollen viability (in hermaphrodites)was also lower, indicating some degree of inbreeding depression. Hybrids between sympatric species exhibited higher post-pollination isolation (decrease of pollen viability), which suggests that the reproductive isolation had been increased by natural selection (effect similar to the Wallace effect). The strength of the postzygotic barrier (based on pollen viability) was generally stronger than that of the prezygotic barrier (based on distribution overlap) in studied hybridizing species pairs. (en)
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| Title
| - Pollen viability and natural hybridization of Central European species of Cirsium
- Pollen viability and natural hybridization of Central European species of Cirsium (en)
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| skos:prefLabel
| - Pollen viability and natural hybridization of Central European species of Cirsium
- Pollen viability and natural hybridization of Central European species of Cirsium (en)
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| skos:notation
| - RIV/62156489:43210/10:00160332!RIV15-MSM-43210___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA206/07/0859), P(GAP506/10/1363), P(LC06073), S, Z(MSM0021622416)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/62156489:43210/10:00160332
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - genetic distance; AFLP (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Bureš, Petr
- Knoll, Aleš
- Rotreklová, Olga
- Šmarda, Petr
- Konečný, Jiří
- Fajmon, Karel
- Šmerda, Jakub
- Burešová, Michaela
- Oberreiter, Michal
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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