A diploid drop in the tetraploid ocean: hybridization and long-term survival of a singular population of Centaurea weldeniana Rchb. (Asteraceae), a taxon new to Austria

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F12%3A43883390" target="_blank" >RIV/60076658:12310/12:43883390 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s00606-012-0641-5" target="_blank" >http://dx.doi.org/10.1007/s00606-012-0641-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00606-012-0641-5" target="_blank" >10.1007/s00606-012-0641-5</a>

Result language
angličtina
Original language name
A diploid drop in the tetraploid ocean: hybridization and long-term survival of a singular population of Centaurea weldeniana Rchb. (Asteraceae), a taxon new to Austria
Original language description
A population of Centaurea weldeniana was discovered recently near Wien (Vienna). The species is reported from Austria for the first time. Determination is confirmed by morphometric analysis of Central European and additional Balkan material of the C. jacea agg. and karyological data. All sampled populations of C. weldeniana are diploid, while only tetraploids have been reported from Central Europe within the C. jacea agg. so far. Detailed morphometric analysis of the newly discovered C. weldeniana population revealed several hybrids with tetraploid C. jacea. The hybrids are tetraploid and originate from unreduced gametes of diploids. No triploids were found. Indeed, the incidence of hybridization is surprisingly low. The population was probably discovered already in 1886 (determined as C. bracteata) and was described as a new species C. argyrolepis in 1901, but these data were lost. However, this isolated diploid population has survived for at least 125 years, which provides a good exa
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EF - Botany
OECD FORD branch
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Project
<a href="/en/project/GA206%2F08%2F1126" target="_blank" >GA206/08/1126: Hybridization between ploidy levels and the role of unreduced gametes in polyploid complex Centaurea sect. Jacea (Knapweeds)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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