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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F12%3A43883698%21RIV13-MSM-12310___
rdf:type
skos:Concept n12:Vysledek
dcterms:description
Karyological variation, reproductive isolation, morphological differentiation and geographic distribution of the cytotypes of Centaurea phrygia were investigated in Central Europe. Occurrence of two dominant cytotypes, diploid (2n = 22) and tetraploid (2n = 44), was confirmed and additionally triploid, pentaploid and hexaploid ploidy levels identified using flow cytometry. Allozyme variation as well as morphological and genome size data suggest an autopolyploid origin of the tetraploids. Crossing experiments and flow cytometric screening of mixed populations revealed strong reproductive isolation of the cytotypes. Multivariate morphometric analysis revealed significant differentiation between the cytotypes in several morphological characters (pappus length, length and colour of appendages on involucral bracts, involucre width). The cytotypes have a parapatric distribution with only a small contact zone: diploids occupy the whole of the Central and North European geographic range of the species except for the major part of the Western Carpathians, whereas tetraploids are confined to the Western Carpathians and adjacent areas, both cytotypes co-occurring only in a limited area of intra-montane basins of the Western Carpathians. Based on this array of data, taxonomic treatment of the cytotypes as autonomous species is proposed. The name Centaurea phrygia is applied to the diploids and the name C. erdneri belongs to the tetraploids; nomenclature of hybrids with C. jacea is also resolved. Karyological variation, reproductive isolation, morphological differentiation and geographic distribution of the cytotypes of Centaurea phrygia were investigated in Central Europe. Occurrence of two dominant cytotypes, diploid (2n = 22) and tetraploid (2n = 44), was confirmed and additionally triploid, pentaploid and hexaploid ploidy levels identified using flow cytometry. Allozyme variation as well as morphological and genome size data suggest an autopolyploid origin of the tetraploids. Crossing experiments and flow cytometric screening of mixed populations revealed strong reproductive isolation of the cytotypes. Multivariate morphometric analysis revealed significant differentiation between the cytotypes in several morphological characters (pappus length, length and colour of appendages on involucral bracts, involucre width). The cytotypes have a parapatric distribution with only a small contact zone: diploids occupy the whole of the Central and North European geographic range of the species except for the major part of the Western Carpathians, whereas tetraploids are confined to the Western Carpathians and adjacent areas, both cytotypes co-occurring only in a limited area of intra-montane basins of the Western Carpathians. Based on this array of data, taxonomic treatment of the cytotypes as autonomous species is proposed. The name Centaurea phrygia is applied to the diploids and the name C. erdneri belongs to the tetraploids; nomenclature of hybrids with C. jacea is also resolved.
dcterms:title
Differentiation between diploid and tetraploid Centaurea phrygia: mating barriers, morphology and geographic distribution Differentiation between diploid and tetraploid Centaurea phrygia: mating barriers, morphology and geographic distribution
skos:prefLabel
Differentiation between diploid and tetraploid Centaurea phrygia: mating barriers, morphology and geographic distribution Differentiation between diploid and tetraploid Centaurea phrygia: mating barriers, morphology and geographic distribution
skos:notation
RIV/60076658:12310/12:43883698!RIV13-MSM-12310___
n12:predkladatel
n19:orjk%3A12310
n3:aktivita
n4:Z n4:P n4:I
n3:aktivity
I, P(GA206/08/1126), P(GA206/09/1126), Z(AV0Z60050516), Z(MSM6007665801)
n3:cisloPeriodika
1
n3:dodaniDat
n13:2013
n3:domaciTvurceVysledku
n7:1804103 n7:4543009
n3:druhVysledku
n16:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
131274
n3:idVysledku
RIV/60076658:12310/12:43883698
n3:jazykVysledku
n8:eng
n3:klicovaSlova
taxonomy; reproductive isolation; polyploidy; nomenclature; multivariate morphometric analysis; geographic distribution; flow cytometry; Centaurea melanocalathia; Centaurea phrygia; Centaurea sect. Jacea
n3:klicoveSlovo
n5:Centaurea%20sect.%20Jacea n5:Centaurea%20melanocalathia n5:Centaurea%20phrygia n5:geographic%20distribution n5:reproductive%20isolation n5:multivariate%20morphometric%20analysis n5:nomenclature n5:polyploidy n5:flow%20cytometry n5:taxonomy
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[13B7D11D6C0B]
n3:nazevZdroje
Preslia : časopis České botanické společnosti
n3:obor
n15:EF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n14:GA206%2F09%2F1126 n14:GA206%2F08%2F1126
n3:rokUplatneniVysledku
n13:2012
n3:svazekPeriodika
84
n3:tvurceVysledku
Štěpánek, Jan Koutecký, Petr Baďurová, Tereza
n3:wos
000302671300001
n3:zamer
n11:AV0Z60050516 n11:MSM6007665801
s:issn
0032-7786
s:numberOfPages
32
n10:organizacniJednotka
12310