About: A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Jacobaea vulgaris subsp. vulgaris constitutes an intricate polyploid complex distributed in Europe. Four chromosome numbers have been reported in this species: 2n=20, 40, 80 and 32. Chromosome number 2n=20 reported from Bulgaria is due to misidentification with J. aquatica. We discovered new hexaploid (2n=6x=60) cytotype occuring within four sympatric populations of otherwise tetraploid and octoploid plants in the Czech Republic, Slovakia and Ukraine. The frequency of hexaploid individuals within 76 studied populations is very low (only 10 of 693 analysed plants), and hexaploids probably represent hybrids between tetraploid and octoploid plants. Multivariate morphometric analysis reveals partial separation of tetraploid and octoploid plants, whereas hexaploid individuals are similar to octoploids. Octoploids and hexaploids exhibit slightly longer ray florets, involucral bracts and tubular florets and more hairy outer achenes. Hexaploid plants display larger pollen grains and lower pollen fertility. Jacobaea vulgaris subsp. vulgaris constitutes an intricate polyploid complex distributed in Europe. Four chromosome numbers have been reported in this species: 2n=20, 40, 80 and 32. Chromosome number 2n=20 reported from Bulgaria is due to misidentification with J. aquatica. We discovered new hexaploid (2n=6x=60) cytotype occuring within four sympatric populations of otherwise tetraploid and octoploid plants in the Czech Republic, Slovakia and Ukraine. The frequency of hexaploid individuals within 76 studied populations is very low (only 10 of 693 analysed plants), and hexaploids probably represent hybrids between tetraploid and octoploid plants. Multivariate morphometric analysis reveals partial separation of tetraploid and octoploid plants, whereas hexaploid individuals are similar to octoploids. Octoploids and hexaploids exhibit slightly longer ray florets, involucral bracts and tubular florets and more hairy outer achenes. Hexaploid plants display larger pollen grains and lower pollen fertility. (en)
Title	A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin (en)
skos:prefLabel	A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin (en)
skos:notation	RIV/00216224:14310/10:00044966!RIV11-MSM-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LC06073), Z(MSM0021622416)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Grulich, Vít Rotreklová, Olga
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
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	244737
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/10:00044966
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Senecio jacobaea; Asteraceae; ploidy level; habitat differentiation; habitat differentiation; evolutionary dynamics; distribution patterns; hexaploid cytotypes; flowering plants; floral variation; Eastern Alps; fitness (en)
http://linked.open.../riv/klicoveSlovo	hexaploid cytotypes Asteraceae evolutionary dynamics habitat differentiation fitness distribution patterns Eastern Alps Senecio jacobaea floral variation flowering plants ploidy level
http://linked.open...odStatuVydavatele	DK - Dánské království
http://linked.open...ontrolniKodProRIV	[1830FF254121]
http://linked.open...i/riv/nazevZdroje	Nordic Journal of Botany
http://linked.open...in/vavai/riv/obor	EF
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Biodiversity Research Center
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	28
http://linked.open...iv/tvurceVysledku	Grulich, Vít Rotreklová, Olga Hodálová, Iva Vinikarová, Alexandra Mereďa, Pavel
http://linked.open...ain/vavai/riv/wos	000281551400004
http://linked.open...n/vavai/riv/zamer	Diversity of Biotic Communities and Populations: Causal Analysis of variation in space and time
issn	0107-055X
number of pages	15 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin A new cytotype of Jacobaea vulgaris (Asteraceae): frequency, morphology and origin

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