Constraints on interspecific hybridization intensity of Cirsium
oleraceum-rivulare-palustre-acaulon complex (Asteraceae)

a 2022

Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae)

MAHADURA, Ashini Dias a Petr BUREŠ

Základní údaje

Originální název

Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae)

Autoři

MAHADURA, Ashini Dias a Petr BUREŠ

Vydání

International Conference on Sexual Plant Reproduction, 2022

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Utajení

není předmětem státního či obchodního tajemství

Odkazy

The 26th International Conference on Sexual Plant Reproduction Abstract Book

Příznaky

Mezinárodní význam

Změněno: 27. 12. 2023 00:21, prof. RNDr. Petr Bureš, Ph.D.

Anotace

V originále

The study was conducted to determine possible causes that allow or limit the interspecific hybridization intensity of Cirsium oleraceum-rivularepalustre-acaulon complex based on data of different field sites in Central Europe and herbarium records. Among the six possible hybridizing pairs of four Cirsium species studied, frequency of natural hybrids expressed by 641 herbarium specimens are 31.20 % of C. oleraceum x C. rivulare, 25.43 % of C. oleraceum x C. palustre, 22 % of C. oleraceum x C. acaulon and 21.22 % of C. palustre x C. rivulare. Cirsium acaulon rarely produce hybrids with C. rivulare (0.15 %) and C. palustre (0 %). The hybridization potential between species-pairs is estimated based on geographic, ecological similarities and floral phenological overlap constituting the premating reproductive barrier. Compared to the species pair acaulonrivulare, the species pairs oleraceum-acaulon and oleraceum-rivulare are 40-times higher in their geographical distributions and 12-times higher than oleraceum-palustre. However, no hybrid C. acaulon x C. palustre was detected. The ecological similarity between the potentially hybridizing species pairs are oleraceum-rivulare > palustre-rivulare > oleraceum-palustre > oleraceum-acaulon > acaulon-rivulare > acaulonpalustre. The floral phenological overlap between species pairs is as follows, oleraceum-acaulon > oleraceum-palustre > acaulon-palustre > palustre-rivulare > acaulon-rivulare > oleraceum-rivulare. Despite limitations, frequent natural hybridization suggests interspecific pollen competition plays a key role in determining the intensity of hybridization in each hybridizing pair. Future analyses of pollen-pistil interactions, in vivo pollen tube growth rates, will provide the best possible explanation for a wide variation in Cirsium hybrid intensity.

Citovat

MAHADURA, Ashini Dias a Petr BUREŠ. Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae). In BUREŠ, Petr. International Conference on Sexual Plant Reproduction. 2022.

@proceedings{2349872,
   author = {Mahadura, Ashini Dias and Bureš, Petr},
   booktitle = {International Conference on Sexual Plant Reproduction},
   language = {eng},
   title = {Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae)},
   url = {https://www.prague2020.eu/resources/Abstract-Book_ICSPR_18.06.2022.pdf},
   year = {2022}
}

TY  - CONF
ID  - 2349872
AU  - Mahadura, Ashini Dias - Bureš, Petr
PY  - 2022
TI  - Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae)
UR  - https://www.prague2020.eu/resources/Abstract-Book_ICSPR_18.06.2022.pdf
N2  - The study was conducted to determine possible causes that allow or limit the interspecific hybridization intensity of Cirsium oleraceum-rivularepalustre-acaulon complex based on data of different field sites in Central Europe and herbarium records. Among the six possible hybridizing pairs of four Cirsium species studied, frequency of natural hybrids expressed by 641 herbarium specimens are 31.20 % of C. oleraceum x C. rivulare, 25.43 % of C. oleraceum x C. palustre, 22 % of C. oleraceum x C. acaulon and 21.22 % of C. palustre x C. rivulare. Cirsium acaulon rarely produce hybrids with C. rivulare (0.15 %) and C. palustre (0 %). The hybridization potential between species-pairs is estimated based on geographic, ecological similarities and floral phenological overlap constituting the premating reproductive barrier. Compared to the species pair acaulonrivulare, the species pairs oleraceum-acaulon and oleraceum-rivulare are 40-times higher in their geographical distributions and 12-times higher than oleraceum-palustre. However, no hybrid C. acaulon x C. palustre was detected. The ecological similarity between the potentially hybridizing species pairs are oleraceum-rivulare > palustre-rivulare > oleraceum-palustre > oleraceum-acaulon > acaulon-rivulare > acaulonpalustre. The floral phenological overlap between species pairs is as follows, oleraceum-acaulon > oleraceum-palustre > acaulon-palustre > palustre-rivulare > acaulon-rivulare > oleraceum-rivulare. Despite limitations, frequent natural hybridization suggests interspecific pollen competition plays a key role in determining the intensity of hybridization in each hybridizing pair. Future analyses of pollen-pistil interactions, in vivo pollen tube growth rates, will provide the best possible explanation for a wide variation in Cirsium hybrid intensity.
ER  -

MAHADURA, Ashini Dias a Petr BUREŠ. Constraints on interspecific hybridization intensity of Cirsium oleraceum-rivulare-palustre-acaulon complex (Asteraceae). In BUREŠ, Petr. \textit{International Conference on Sexual Plant Reproduction}. 2022.

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