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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F13%3A33145943%21RIV14-GA0-15310___
rdf:type
skos:Concept n13:Vysledek
rdfs:seeAlso
http://aob.oxfordjournals.org/content/111/3/419.full.pdf+html
dcterms:description
Although the large variation in genome size among different species is widely acknowledged, the occurrence and extent of variation below the species level are still controversial and have not yet been satisfactorily analysed. The aim of this study was to assess genome size variation in six ploidy levels (2n = 3x- 8x) of the polyploid Allium oleraceum over a large geographical gradient and to search for potential interpretations of the size variation. The genome sizes of 407 individuals of A. oleraceum collected from 114 populations across Europe were determined by flow cytometry using propidium iodide staining. The genome size variation was correlated with spatial, climatic and habitat variables. The mean holoploid genome size (2C DNA) was 42.49, 52.14, 63.34, 71.94, 85.51 and 92.12 pg at the tri-, tetra-, penta-, hexa-, hepta- and octoploid levels, respectively. Genome size varied from a minimum of 2.3% in the octoploids to a maximum of 18.3% in the tetraploids. Spatial structuring of genome size was observed within the tetra- and pentaploids, where 2C DNA significantly increased with both latitude and longitude, and correlated with several climatic variables, suggesting a gradient of continentality. Genome size in hexaploids showed low variation, weak correlation with climatic variables and no spatial structuring. Downsizing in monoploid genome size was observed between all cytotypes except for heptaploids. Splitting populations into western and eastern European groups resulted in strong differences in monoploid genome size between groups in tetra- and pentaploids but not in hexaploids. The monoploid genome sizes of the cytotypes were similar in the western group but diverged in the eastern group. Complex patterns of holoploid and monoploid genome size variation found both within and between A. oleraceum cytotypes are most likely the result of several interacting factors. Although the large variation in genome size among different species is widely acknowledged, the occurrence and extent of variation below the species level are still controversial and have not yet been satisfactorily analysed. The aim of this study was to assess genome size variation in six ploidy levels (2n = 3x- 8x) of the polyploid Allium oleraceum over a large geographical gradient and to search for potential interpretations of the size variation. The genome sizes of 407 individuals of A. oleraceum collected from 114 populations across Europe were determined by flow cytometry using propidium iodide staining. The genome size variation was correlated with spatial, climatic and habitat variables. The mean holoploid genome size (2C DNA) was 42.49, 52.14, 63.34, 71.94, 85.51 and 92.12 pg at the tri-, tetra-, penta-, hexa-, hepta- and octoploid levels, respectively. Genome size varied from a minimum of 2.3% in the octoploids to a maximum of 18.3% in the tetraploids. Spatial structuring of genome size was observed within the tetra- and pentaploids, where 2C DNA significantly increased with both latitude and longitude, and correlated with several climatic variables, suggesting a gradient of continentality. Genome size in hexaploids showed low variation, weak correlation with climatic variables and no spatial structuring. Downsizing in monoploid genome size was observed between all cytotypes except for heptaploids. Splitting populations into western and eastern European groups resulted in strong differences in monoploid genome size between groups in tetra- and pentaploids but not in hexaploids. The monoploid genome sizes of the cytotypes were similar in the western group but diverged in the eastern group. Complex patterns of holoploid and monoploid genome size variation found both within and between A. oleraceum cytotypes are most likely the result of several interacting factors.
dcterms:title
Role of adaptive and non-adaptive mechanisms forming complex patterns of genome size variation in six cytotypes of polyploid Allium oleraceum (Amaryllidaceae) on a continental scale Role of adaptive and non-adaptive mechanisms forming complex patterns of genome size variation in six cytotypes of polyploid Allium oleraceum (Amaryllidaceae) on a continental scale
skos:prefLabel
Role of adaptive and non-adaptive mechanisms forming complex patterns of genome size variation in six cytotypes of polyploid Allium oleraceum (Amaryllidaceae) on a continental scale Role of adaptive and non-adaptive mechanisms forming complex patterns of genome size variation in six cytotypes of polyploid Allium oleraceum (Amaryllidaceae) on a continental scale
skos:notation
RIV/61989592:15310/13:33145943!RIV14-GA0-15310___
n13:predkladatel
n14:orjk%3A15310
n3:aktivita
n6:P
n3:aktivity
P(GA206/09/1126), P(GP206/04/P115)
n3:cisloPeriodika
3
n3:dodaniDat
n16:2014
n3:domaciTvurceVysledku
n4:3978508 n4:2588765 n4:5250927
n3:druhVysledku
n9:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
103277
n3:idVysledku
RIV/61989592:15310/13:33145943
n3:jazykVysledku
n8:eng
n3:klicovaSlova
Allium oleraceum, Amaryllidaceae, climate, Europe, flow cytometry, genome size variation, geophytes, polyploidy, spatial distribution
n3:klicoveSlovo
n5:climate n5:Allium%20oleraceum n5:polyploidy n5:flow%20cytometry n5:spatial%20distribution n5:genome%20size%20variation n5:Amaryllidaceae n5:geophytes n5:Europe
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[983EAE51C8E5]
n3:nazevZdroje
Annals of Botany
n3:obor
n17:EF
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n7:GP206%2F04%2FP115 n7:GA206%2F09%2F1126
n3:rokUplatneniVysledku
n16:2013
n3:svazekPeriodika
111
n3:tvurceVysledku
Duchoslav, Martin Jandová, Michaela Šafářová, Lenka
n3:wos
000316691800010
s:issn
0305-7364
s:numberOfPages
12
n20:doi
10.1093/aob/mcs297
n15:organizacniJednotka
15310