This HTML5 document contains 64 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
n21http://localhost/temp/predkladatel/
n7http://linked.opendata.cz/resource/domain/vavai/projekt/
n4http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n12http://linked.opendata.cz/resource/domain/vavai/subjekt/
n11http://linked.opendata.cz/ontology/domain/vavai/
shttp://schema.org/
skoshttp://www.w3.org/2004/02/skos/core#
rdfshttp://www.w3.org/2000/01/rdf-schema#
n3http://linked.opendata.cz/ontology/domain/vavai/riv/
n18http://bibframe.org/vocab/
n15http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F00216208%3A11310%2F13%3A10192058%21RIV14-GA0-11310___/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n6http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n17http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n13http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n8http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n14http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n10http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n19http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10192058%21RIV14-GA0-11310___
rdf:type
skos:Concept n11:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1093/aob/mct030
dcterms:description
Genome duplication is widely acknowledged as a major force in the evolution of angiosperms, although the incidence of polyploidy in different floras may differ dramatically. The Greater Cape Floristic Region of southern Africa is one of the worlds biodiversity hotspots and is considered depauperate in polyploids. To test this assumption, ploidy variation was assessed in a widespread member of the largest geophytic genus in the Cape flora: Oxalis obtusa. DNA flow cytometry complemented by confirmatory chromosome counts was used to determine ploidy levels in 355 populations of O. obtusa (1014 individuals) across its entire distribution range. Ecological differentiation among cytotypes was tested by comparing sets of vegetation and climatic variables extracted for each locality. Three majority (2x, 4x, 6x) and three minority (3x, 5x, 8x) cytotypes were detected in situ, in addition to a heptaploid individual originating from a botanical garden. While single-cytotype populations predominate, 12 mixed-ploidy populations were also found. The overall pattern of ploidy level distribution is quite complex, but some ecological segregation was observed. Hexaploids are the most common cytotype and prevail in the Fynbos biome. In contrast, tetraploids dominate in the Succulent Karoo biome. Precipitation parameters were identified as the most important climatic variables associated with cytotype distribution. Although it would be premature to make generalizations regarding the role of genome duplication in the genesis of hyperdiversity of the Cape flora, the substantial and unexpected ploidy diversity in Oxalis obtusa is unparalleled in comparison with any other cytologically known native Cape plant species. The results suggest that ploidy variation in the Greater Cape Floristic Region may be much greater than currently assumed, which, given the documented role of polyploidy in speciation, has direct implications for radiation hypotheses in this biodiversity hotspot. Genome duplication is widely acknowledged as a major force in the evolution of angiosperms, although the incidence of polyploidy in different floras may differ dramatically. The Greater Cape Floristic Region of southern Africa is one of the worlds biodiversity hotspots and is considered depauperate in polyploids. To test this assumption, ploidy variation was assessed in a widespread member of the largest geophytic genus in the Cape flora: Oxalis obtusa. DNA flow cytometry complemented by confirmatory chromosome counts was used to determine ploidy levels in 355 populations of O. obtusa (1014 individuals) across its entire distribution range. Ecological differentiation among cytotypes was tested by comparing sets of vegetation and climatic variables extracted for each locality. Three majority (2x, 4x, 6x) and three minority (3x, 5x, 8x) cytotypes were detected in situ, in addition to a heptaploid individual originating from a botanical garden. While single-cytotype populations predominate, 12 mixed-ploidy populations were also found. The overall pattern of ploidy level distribution is quite complex, but some ecological segregation was observed. Hexaploids are the most common cytotype and prevail in the Fynbos biome. In contrast, tetraploids dominate in the Succulent Karoo biome. Precipitation parameters were identified as the most important climatic variables associated with cytotype distribution. Although it would be premature to make generalizations regarding the role of genome duplication in the genesis of hyperdiversity of the Cape flora, the substantial and unexpected ploidy diversity in Oxalis obtusa is unparalleled in comparison with any other cytologically known native Cape plant species. The results suggest that ploidy variation in the Greater Cape Floristic Region may be much greater than currently assumed, which, given the documented role of polyploidy in speciation, has direct implications for radiation hypotheses in this biodiversity hotspot.
dcterms:title
High ploidy diversity and distinct patterns of cytotype distribution in a widespread species of Oxalis in the Greater Cape Floristic Region High ploidy diversity and distinct patterns of cytotype distribution in a widespread species of Oxalis in the Greater Cape Floristic Region
skos:prefLabel
High ploidy diversity and distinct patterns of cytotype distribution in a widespread species of Oxalis in the Greater Cape Floristic Region High ploidy diversity and distinct patterns of cytotype distribution in a widespread species of Oxalis in the Greater Cape Floristic Region
skos:notation
RIV/00216208:11310/13:10192058!RIV14-GA0-11310___
n11:predkladatel
n12:orjk%3A11310
n3:aktivita
n13:I n13:S n13:P
n3:aktivity
I, P(GAP506/10/0643), P(MEB061101), S
n3:cisloPeriodika
4
n3:dodaniDat
n19:2014
n3:domaciTvurceVysledku
n4:3399060 n4:3251217 n4:4822528 n4:2874385 n4:5164710 n4:1252372
n3:druhVysledku
n14:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
77350
n3:idVysledku
RIV/00216208:11310/13:10192058
n3:jazykVysledku
n8:eng
n3:klicovaSlova
vegetation; Succulent Karoo; polyploidy; Oxalis obtusa; Fynbos; flow cytometry; cytogeography; Cape Floristic Region
n3:klicoveSlovo
n6:Fynbos n6:Succulent%20Karoo n6:Oxalis%20obtusa n6:polyploidy n6:vegetation n6:flow%20cytometry n6:cytogeography n6:Cape%20Floristic%20Region
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[93035A1F9CB9]
n3:nazevZdroje
Annals of Botany
n3:obor
n10:EF
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
11
n3:projekt
n7:MEB061101 n7:GAP506%2F10%2F0643
n3:rokUplatneniVysledku
n19:2013
n3:svazekPeriodika
111
n3:tvurceVysledku
Krejčíková, Jana Suda, Jan Trávníček, Pavel Dreyer, Leanne L. Oberlander, Kenneth Sudová, Radka Weiss-Schneeweiss, Hanna Urfus, Tomáš Kolano, Božena Lučanová, Magdalena Vít, Petr
n3:wos
000316692500011
s:issn
0305-7364
s:numberOfPages
9
n18:doi
10.1093/aob/mct030
n21:organizacniJednotka
11310