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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00044966" target="_blank" >RIV/00216224:14310/10:00044966 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 poll

Název v anglickém jazyce

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

Popis výsledku anglicky

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 poll

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EF - Botanika

OECD FORD obor

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Projekt

<a href="/cs/project/LC06073" target="_blank" >LC06073: Centrum pro výzkum biodiverzity</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nordic Journal of Botany

ISSN

0107-055X

e-ISSN

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Svazek periodika

28

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DK - Dánské království

Počet stran výsledku

15

Strana od-do

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Kód UT WoS článku

000281551400004

EID výsledku v databázi Scopus

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