About: Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella

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About: Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 that within the seedlings, the selection against progeny cytotypes with extreme ploidy levels (3x to 4x or 10x to 12x) was shown. 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 that within the seedlings, the selection against progeny cytotypes with extreme ploidy levels (3x to 4x or 10x to 12x) was shown. (en)
Title	Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella (en)
skos:prefLabel	Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella Ploidy level and reproductive behaviour in the facultatively apomictic high-polyploid Hieracium subgen. Pilosella (en)
skos:notation	RIV/00216224:14310/09:00029664!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA206/07/0059), P(LC06073), Z(MSM0021622416)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Rotreklová, Olga
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	333683
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/09:00029664
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	polyploidy; hybridization; Hieracium subgen. Pilosella (en)
http://linked.open.../riv/klicoveSlovo	Hieracium subgen. Pilosella hybridization polyploidy
http://linked.open...ontrolniKodProRIV	[A1745CCAB3E0]
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Biodiversity Research Center Microevolutionary aspects of residual sexuality in apomictic plants: detection, rate and manifestation in populations of Hieracium subgenus Pilosella
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Rotreklová, Olga Krahulcová, Anna
http://linked.open...n/vavai/riv/zamer	Diversity of Biotic Communities and Populations: Causal Analysis of variation in space and time
http://localhost/t...ganizacniJednotka	14310

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