Důkaz mezidruhové hybridizace v rodu Hieracium na Novém Zélandu pomocí průtokové cytometrie

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F04%3A00109820" target="_blank" >RIV/67985939:_____/04:00109820 - 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

Interspecific hybridization among Hieracium species in New Zealand: evidence from flow cytometry

Popis výsledku v původním jazyce

Interspecific hybridization between Hieracium pilosella and H. praealtum (Asteraceae) was detected in introduced populations in New Zealand. Both parental species and hybrids occure there as tetraploids (2n = 36) and pentaploids (2n = 45). The differenceabout 22% in haploid DNA content between parental species enables the detection of hybrids and estimation of their genome composition by flow cytometry. Tetraploid putative hybrids (according to morphology) had mean genome sizes equivalent to two H. pilosella and two H. praealtum monoploid chromosome sets. This suggests their origin from the fertilization of two reduced gametes. The genome size of more common pentaploid hybrids corresponded to four H. pilosella and one H. praealtum sets. These are probably products of backcrosses with H. pilosella and/or of hybrid-hybrid crosses. In spite of predominant apomictic reproduction in both parental taxa and hybrids, the residual sexuality can provide opportunity for interspecific gene flow.

Název v anglickém jazyce

Interspecific hybridization among Hieracium species in New Zealand: evidence from flow cytometry

Popis výsledku anglicky

Interspecific hybridization between Hieracium pilosella and H. praealtum (Asteraceae) was detected in introduced populations in New Zealand. Both parental species and hybrids occure there as tetraploids (2n = 36) and pentaploids (2n = 45). The differenceabout 22% in haploid DNA content between parental species enables the detection of hybrids and estimation of their genome composition by flow cytometry. Tetraploid putative hybrids (according to morphology) had mean genome sizes equivalent to two H. pilosella and two H. praealtum monoploid chromosome sets. This suggests their origin from the fertilization of two reduced gametes. The genome size of more common pentaploid hybrids corresponded to four H. pilosella and one H. praealtum sets. These are probably products of backcrosses with H. pilosella and/or of hybrid-hybrid crosses. In spite of predominant apomictic reproduction in both parental taxa and hybrids, the residual sexuality can provide opportunity for interspecific gene flow.

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/KSK6005114" target="_blank" >KSK6005114: Biodiversita a funkce ekologických soustav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Heredity

ISSN

0018-067X

e-ISSN

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Svazek periodika

93

Číslo periodika v rámci svazku

-

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

34-42

Kód UT WoS článku

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EID výsledku v databázi Scopus

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