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Volume 61, Issue 4

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Hieracium × grofae — a rediscovered diploid hybrid from the Ukrainian Carpathians

Jindřich Chrtek / Patrik Mráz
  • Institute of Biology and Ecology, P.J. Šafárik University, Faculty of Science, Mánesova 23, SK-04154, Košice, Slovakia
  • Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 14, SK-84523, Bratislava, Slovakia
  • Laboratoire d’Ecologie Alpine, Université Joseph Fourier, UMR UJF-CNRS 5553, PO Box 53, FR-38041, Grenoble Cedex 9, France
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/ Alexander Sennikov
Published Online: 2006-08-01 | DOI: https://doi.org/10.2478/s11756-006-0066-0

Abstract

Diploid hybrid plants (2n = 18) between sexual diploid cytotypes of Hieracium alpinum and H. umbellatum were found in the Ukrainian Eastern Carpathians. They were identified with H. × grofae Woł., originally used for the combination H. decipiens × H. umbellatum var. lactaris. As H. decipiens sensu Woł. (non Tausch) does not produce viable pollen grains and is most probably a polyploid apomict, it is unlikely to produce diploid hybrid plants with diploid H. umbellatum. Both parent species, Hieracium alpinum and H. umbellatum are also given by Wołoszczak from the original locality. Thus we conclude that H. × grofae is result of hybridization between H. alpinum and high mountain form of H. umbellatum. Hybrid plants are morphologically intermediate between the parent species, and moreover resemble closely or they are identical with the experimental hybrids of the same parent combination. Hybrids produce rather high amount of homogeneously sized pollen grains (values of standard deviation and coefficient of variation lower then upper limits for diploids — 3μm or 7.5%, respectively), and might probably serve as male parents in further crosses; on the other hand, they are fully seed-sterile. A lectotype of H. × grofae, a second proved nothotaxon in the genus Hieracium s.str., is designated. Localities of H. × grofae are located in subalpine belt of the Marmarosh Mts, the Svydovets’ Mts and the Horhany Mts (all in the Ukrainian Eastern Carpathians). Biotopes of hybrid plants usually represent secondary formed and disturbed pastures allowing close contact of altitudinally vicariant parent taxa.

Keywords: Asteraceae; chromosome numbers; homoploid hybridization; lectotype

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About the article

Published Online: 2006-08-01

Published in Print: 2006-08-01


Citation Information: Biologia, Volume 61, Issue 4, Pages 365–373, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.2478/s11756-006-0066-0.

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© 2006 Institute of Botany, Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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