Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029664" target="_blank" >RIV/00216224:14310/09:00029664 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella
Popis výsledku v původním jazyce
The reproductive behaviour and the capacity to generate variation in ploidy level was studied in heptaploid and octoploid hybrid mother plants of Hieracium subgen. Pilosella. Three ways in shaping the ploidy level variation were found: 1. Mating via unreduced gametes (2n + n, n + 2n) even further increased the ploidy level in the progeny of heptaploid and octoploid mother-plants up to 9x, 10x, 11x, 12x. 2. Mating via reduced gametes (n + n) or true apomixis (2n + 0) resulted in the cytotypes commonly occurring at the locality (4x, 5x, 6x), or it conserved the maternal ploidy level (7x, 8x), respectively. 3. Haploid parthenogenesis (n + 0) reduced the ploidy level: 3x to 4x polyhaploid progeny was found. Comparing the variation within the seeds to thatwithin the seedlings, the selection against progeny cytotypes with extreme ploidy levels (3x to 4x or 10x to 12x) was shown.
Název v anglickém jazyce
Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella
Popis výsledku anglicky
The reproductive behaviour and the capacity to generate variation in ploidy level was studied in heptaploid and octoploid hybrid mother plants of Hieracium subgen. Pilosella. Three ways in shaping the ploidy level variation were found: 1. Mating via unreduced gametes (2n + n, n + 2n) even further increased the ploidy level in the progeny of heptaploid and octoploid mother-plants up to 9x, 10x, 11x, 12x. 2. Mating via reduced gametes (n + n) or true apomixis (2n + 0) resulted in the cytotypes commonly occurring at the locality (4x, 5x, 6x), or it conserved the maternal ploidy level (7x, 8x), respectively. 3. Haploid parthenogenesis (n + 0) reduced the ploidy level: 3x to 4x polyhaploid progeny was found. Comparing the variation within the seeds to thatwithin the seedlings, the selection against progeny cytotypes with extreme ploidy levels (3x to 4x or 10x to 12x) was shown.
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
EF - Botanika
OECD FORD obor
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Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Ostatní
Rok uplatnění
2009
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů