Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella
The result's identifiers
Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella
Original language description
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.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
EF - Botany
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů