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UO > About > Organizational Structure > Faculties & Institutes > Faculty of Science > About > Organizational Structure > Departments & Centres > Department of Biology and Ecology

Karel Janko


Academic degree, name, surname:
Mgr. Karel Janko, Ph.D.
Room, floor, building:
Position:
Research interests and teaching:
Department (Faculty):
Department of Biology and Ecology (Faculty of Science)
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No record found.



All-male hybrids of a tetrapod Pelophylax esculentus share its origin and genetics of maintenance
Marie Doležálková-Kaštánková, Nicolas Pruvost, Jorg Plotner, Uli Reyer, Karel Janko, Lukáš Choleva ... other authors
Year: 2018, BIOLOGY OF SEX DIFFERENCES
journal article
 
Tardigrada and Rotifera from moss microhabitats on a disappearing Ugandan glacier, with the description of a new species of water bear
Karel Janko, KRZYSZTOF ZAWIERUCHA, PIOTR GĄSIOREK, Jakub Buda, Jun Uetake, Diego Fontaneto ... other authors
Year: 2018, Zootaxa
journal article
 
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size
Krzysztof Zawierucha, Pawel Podkowa, Martyna Marciniak, Piotr Gasiorek, Katarzyna Zmudcynska-Skarbek, Karel Janko, Maria Wlodarska-Kolwalczuk ... other authors
Year: 2018, Polar Research
journal article
 

A cyclical switch of gametogenic pathways in hybrids depends on the ploidy level
Dmitrij Dedukh, Anatolie Marta, Ra-Yeon Myung, Myeong-Hun Ko, Da-Song Choi, Yong-Jin Won, Karel Janko ... other authors
Year: 2024, Communications Biology
journal article
 
Islands of ice: Glacier-dwelling metazoans form regionally distinct populations despite extensive periods of deglaciation
Karel Janko, Daniel H. Shain, Diego Fontaneto, Marie Kaštánková Doležálková, Jakub Buda, Eva Štefková Kašparová, Marie Sabacka, Jørgen Rosvold, Jacek Stefaniak, Dag Olav Hessen, Miloslav Devetter, Marco Antonio Jiménez-Santos, Patrik Horna, Edita Janková Drdová, Jacob Clement Yde, Krzysztof Zawierucha ... other authors
Year: 2024, Diversity and Distributions
journal article
 
Meiotic deviations and endoreplication lead to diploid oocytes in female hybrids between bighead catfish (Clarias macrocephalus) and North African catfish (Clarias gariepinus)
Dmitrij Dedukh, Artem Lisachov, Thitipong Panthum, Worapong Singchat, Yukiko Imai, Karel Janko, Kornsorn Srikulnath ... other authors
Year: 2024, FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
journal article
 
Unifying framework explaining how parental regulatory divergence can drive gene expression in hybrids and allopolyploids
Karel Janko, Jan Eisner, Petr Cigler, Tomas Tichopad
Year: 2024, Nature Communications
journal article
 
Back to the roots, desiccation and radiation resistances are ancestral characters in bdelloid rotifers
Boris Hespeels, Diego Fontaneto, Valerie Cornet, Sebastien Penninckx, Jeremy Berthe, Lucie Bruneau, James W. Larrick, Eloise Rapport, Jeremie Bailly, Nicolas Debortoli, Nataliia Iakovenko, Karel Janko, Anne-Catherine Heuskin, Stephane Lucas, Bernard Hallet, Karine Van Doninck ... other authors
Year: 2023, BMC BIOLOGY
journal article
 
Cryophilic Tardigrada have disjunct and bipolar distribution and establish long-term stable, low-density demes
Krzysztof Zawierucha, Eva Kašparová, Sandra McInnes, Jakub Buda, Roberto Ambrosini, Miloslav Devetter, Gentile Francesco Ficetola, Andrea Franzetti, Nozomu Takeuchi, Patrik Horna, Tereza NovotnaJaromerska, Masato Ono, Marie Sabacka, Karel Janko ... other authors
Year: 2023, POLAR BIOLOGY
journal article
 
Genetic and karyotype divergence between parents affect clonality and sterility in hybrids
Anatolie Marta, Tomáš Tichopád, Oldřich Bartoš, Jiří Klíma, Muhajid Ali Shah, Vendula Bohlen Šlechtová, Jörg Bohlen, Karel Halačka, Lukáš Choleva, Matthias Stöck, Dmitrij Dedukh, Karel Janko ... other authors
Year: 2023, eLife
journal article
 
Sequence capture: Obsolete or irreplaceable? A thorough validation across phylogenetic distances and its applicability to hybrids and allopolyploids
Oldřich Bartoš, Joerg Bohlen, Vendula Bohlen-Šlechtová, Jan Kočí, Jan Röslein, Karel Janko ... other authors
Year: 2023, MOL ECOL RESOUR
journal article
 
Sperm-dependent asexual species and their role in ecology and evolution
Karel Janko, Petr Mikulicek, Roman Hobza, Ingo Schlupp
Year: 2023, ECOLOGY AND EVOLUTION
journal article
 
Achiasmatic meiosis in the unisexual Amazon molly, Poecilia formosa
Dmitrij Dedukh, Irene da Cruz, Susanne Kneitz, Anatolie Marta, Jenny Ormanns, Tomas Tichopad, Yuan Lu, Manfred Alsheimer, Karel Janko, Manfred Schartl ... other authors
Year: 2022, Chromosome research
journal article
 
Clonal gametogenesis is triggered by intrinsic stimuli in the hybrid's germ cells but is dependent on sex differentiation
Tomas Tichopad, Roman Franek, Marie Dolezalkova-Kastankova, Dmitrij Dedukh, Anatolie Marta, Karel Halacka, Christoph Steinbach, Karel Janko, Martin Pšenička ... other authors
Year: 2022, Biology of reproduction
journal article
 
Germline‑restricted chromosome shows remarkable variation in size among closely related passerine species
Manuelita Sotelo-Munoz, Manon Poignet, Tomas Albrecht, Ondrej Kauzal, Dmitrij Dedukh, Stephen A. Schlebusch, Karel Janko, Radka Reifova ... other authors
Year: 2022, Chromosoma
journal article
 
Unveiling the extreme environmental radioactivity of cryoconite from a Norwegian glacier
Edyta Lokas, Przemyslaw Wachniew, Giovanni Baccolo, Pawel Gaca, Karel Janko, Andrew Milton, Jakub Buda, Kamila Komedera, Krzysztof Zawierucha ... other authors
Year: 2022, SCI TOTAL ENVIRON
journal article
 
Comparative phylogeography reveals consistently shallow genetic diversity in a mitochondrial marker in Antarctic bdelloid rotifers
Zeyneb Vildan Cakil, Giuseppe Garlasche, Nataliia Iakovenko, Andrea Di Cesare, Ester M. Eckert, Roberto Guidetti, Lina Hamdan, Karel Janko, Dzmitry Lukashanets, Lorena Rebecchi, Stefano Schiaparelli, Tommaso Sforzi, Eva Štefková Kašparová, Alejandro Velasco-Castrillon, Elizabeth J. Walsh, Diego Fontaneto, Ceridwen Fraser ... other authors
Year: 2021, J BIOGEOGR
journal article
 
Cross-species amplification of microsatellites and identification of polyploid hybrids by allele dosage effects in Cobitis hankugensis x Iksookimia longicorpa hybrid complex (Actinopterygii: Cypriniformes: Cobitidae)
Seung-Woon Yun, Jong-Young Park, Karel Janko
Year: 2021, ACTA ICHTHYOLOGICA ET PISCATORIA
journal article
 
Genome Fractionation and Loss of Heterozygosity in Hybrids and Polyploids
Karel Janko, Oldřich Bartoš, Jan Kočí, Jan Röslein, Edita Janková Drdová, Jan Kotusz, Jan Eisner, Martin Mokrejš, Eva Štefková-Kašparová ... other authors
Year: 2021, Molecular Biology and Evolution
journal article
 
Challenges and Costs of Asexuality: Variation in Premeiotic Genome Duplication in Gynogenetic Hybrids from Cobitis taenia Complex
Dmitrij Dedukh, Anatolie Marta, Karel Janko
Year: 2021, International journal of molecular sciences
journal article
 
Sex chromosomes in meiotic, hemiclonal, clonal and polyploid hybrid vertebrates: along the 'extended speciation continuum'
Matthias Stoeck, Dmitrij Dedukh, Radka Reifova, Dunja K. Lamatsch, Zuzana Starostova, Karel Janko ... other authors
Year: 2021, PHILOS T R SOC B
journal article
 
A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing
K. Zawierucha, D.L. Porazinska, G.F. Ficetola, R. Ambrosini, G. Baccolo, J. Buda, J.L. Ceballos, M. Devetter, R. Dial, A. Franzetti, U. Fuglewicz, L. Gielly, E. Lokas, Karel Janko, T.N. Jaromerska, A. Koscinski, A. Kozlowska, M. Ono, I. Parnikoza, F. Pittino, E. Poniecka, P. Sommers, S.K. Schmidt, D. Shain, S. Sikorska, J. Uetake, N. Takeuchi ... other authors
Year: 2020, JOURNAL OF ZOOLOGY
journal article
 
Cytogenetic Characterization of Seven Novel satDNA Markers in Two Species of Spined Loaches (Cobitis) and Their Clonal Hybrids
M. Anatolie, D. Dedukh, O. Bartos, Z. Majtanova, Karel Janko
Year: 2020, Genes
journal article
 
Integrative approach reveals new species of water bears (Pilatobius, Grevenius, and Acutuncus) from Arctic cryoconite holes, with the discovery of hidden lineages of Hypsibius
K. Zawierucha, J. Buda, T.N. Jaromerska, Karel Janko, P. Gasiorek
Year: 2020, ZOOLOGISCHER ANZEIGER
journal article
 
No evidence for accumulation of deleterious mutations and fitness degradation in clonal fish hybrids: Abandoning sex without regrets
Jan Kočí, Jan Röslein, J. Paces, J. Kotusz, K. Halacka, J. Kosco, J. Fedorcak, Nataliia Iakovenko, Karel Janko ... other authors
Year: 2020, Molecular ecology
journal article
 
Parthenogenesis as a Solution to Hybrid Sterility: The Mechanistic Basis of Meiotic Distortions in Clonal and Sterile Hybrids
D. Dedukh, Z. Majtanova, A. Marta, M. Psenicka, J. Kotusz, J. Klima, D. Juchno, A. Boron, Karel Janko ... other authors
Year: 2020, Genetics
journal article
 
A nematode in the mist: Scottnema lindsayae is the only soil metazoan in remote Antarctic deserts, at greater densities with altitude
K. Zawierucha, C.J. Marshall, D. Wharton, Karel Janko
Year: 2019, POLAR RESEARCH
journal article
 
Sequence capture: Exploring its limits
Jan RÖSLEIN, Oldřich Bartoš, Karel Janko
Year: 2019
presentations (congresses, symposia, conferences, workshops)
 
Sperm-dependent asexual hybrids determine competition among sexual species
Karel Janko, J. Eisner, P. Mikulicek
Year: 2019, Scientific Reports
journal article
 
The Legacy of Sexual Ancestors in Phenotypic Variability, Gene Expression, and Homoeolog Regulation of Asexual Hybrids and Polyploids.
Oldřich Bartoš, Jan Röslein, Jan Kotusz, Ladislav Pekárik, Miroslav Pertýl, Karel Halačka, Eva Štefková Kašparová, Jan Mendel, Alicja Boroń, Dorota Juchno, Anna Leska, Olga Jablonska, Vladimír Beneš, Monika Šídová, Karel Janko ... other authors
Year: 2019, Molecular Biology and Evolution
journal article
 
The Timing and Characterization of Maternal to Zygote Transition and Mid-Blastula Transition in Sterlet Acipenser ruthenus and A. ruthenus x Acipenser gueldenstaedtii Hybrid
K. Pocherniaieva, H. Guralp, T. Saito, M. Psenicka, T. Tichopad, Karel Janko, V. Kaspar ... other authors
Year: 2019, Turkish Journal of Fisheries and Aquatic Sciences
journal article
 
All-male hybrids of a tetrapod Pelophylax esculentus share its origin and genetics of maintenance
Marie Doležálková-Kaštánková, Nicolas Pruvost, Jorg Plotner, Uli Reyer, Karel Janko, Lukáš Choleva ... other authors
Year: 2018, BIOLOGY OF SEX DIFFERENCES
journal article
 
Disentangling the effects of hybridisation and polyploidy: Genomic dissection of intermediate hybrid phenotypes and the role of cis- /trans-regulatory elements
Jan RÖSLEIN, Oldřich Bartoš, Jan Pačes, Monika Šídová, Jan Kotusz, Miroslav Pertýl, Ladislav Pekárik, Karel Halačka, Alicja Boron, Dorota Juchno, Jan Mendel, Eva Kašparová, Karel Janko ... other authors
Year: 2018
presentations (congresses, symposia, conferences, workshops)
 
Hybrid asexuality as a primary postzygotic barrier between nascent species: On the interconnection between asexuality, hybridization and speciation
Karel Janko, Jan Pačes, Hilde Wilkinson-Herbots, Rui J. Costa, Jan Röslein, Pavel Drozd, Nataliia IAKOVENKO, Jakub Ridl, Miluše Hroudová, Jan Kočí, Radka Reifová, Věra Šlechtová, Lukáš Choleva ... other authors
Year: 2018, Molecular Ecology
journal article
 
Tardigrada and Rotifera from moss microhabitats on a disappearing Ugandan glacier, with the description of a new species of water bear
Karel Janko, KRZYSZTOF ZAWIERUCHA, PIOTR GĄSIOREK, Jakub Buda, Jun Uetake, Diego Fontaneto ... other authors
Year: 2018, Zootaxa
journal article
 
Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size
Krzysztof Zawierucha, Pawel Podkowa, Martyna Marciniak, Piotr Gasiorek, Katarzyna Zmudcynska-Skarbek, Karel Janko, Maria Wlodarska-Kolwalczuk ... other authors
Year: 2018, Polar Research
journal article
 
Asexual Reproduction Does Not Apparently Increase the Rate of Chromosomal Evolution: Karyotype Stability in Diploid and Triploid Clonal Hybrid Fish (Cobitis, Cypriniformes, Teleostei)
Zuzana Majtánová, Lukáš Choleva, Radka Symonová, Petr Ráb, Jan Kotusz, Ladislav Pekárik, Karel Janko ... other authors
Year: 2016, PLoS ONE
journal article
 
Asexual Reproduction Does Not Apparently Increase the Rate of Chromosomal Evolution: Karyotype Stability in Diploid and Triploid Clonal Hybrid Fish (Cobitis, Cypriniformes, Teleostei)
Karel Janko
Year: 2016, plos ONe
journal article
 
First record of the Chinese sleeper, Perccottus glenii Dybowski, 1877 (Actinopterygii: Odontobutidae) in the Dnieper Estuary, southern Ukraine (Black Sea drainage)
Yuriy Kvach, Ihor Dykyy, Karel Janko
Year: 2016, BioInvasions Records
journal article
 
Antarctic bdelloid rotifers: diversity, endemism and evolution
Nataliia Iakovenko, J. Smykla, P. Convey, E. Kasparova, I. A. Kozeretska, V. Trokhymets, I. Dykyy, M. Plewka, M. Devetter, Zdeněk Ďuriš, Karel Janko ... other authors
Year: 2015, HYDROBIOLOGIA
journal article
 
Lifestyle and Ice: The Relationship between Ecological Specialization and Response to Pleistocene Climate Change
E. Kasparova, A. P. Van de Putte, C. Marshall, Karel Janko
Year: 2015, PLoS One
journal article
 
Distinguishing between incomplete lineage sorting and genomic introgressions: complete fixation of allospecific mitochondrial DNA in a sexually reproducing fish (Cobitis; Teleostei), despite clonal reproduction of hybrids
L. Choleva, Z. Musilová , A. Kohoutová-Šedivá , J. Pačes , P. Ráb , Karel Janko ... other authors
Year: 2014, PLoS One
journal article
 
Let us not be unfair to asexuals: their ephemerality may be explained by neutral models without invoking any evolutionary constraints of asexuality
Karel Janko
Year: 2014, EVOLUTION
journal article
 
Role of parasite load and differential habitat preferences in maintaining the coexistence of sexual and asexual competitors in fish of the Cobitis taenia hybrid complex
Jan Kotusz, Popiolek Marcin, Pavel Drozd, Vera Slechtova, Karel Janko
Year: 2014, BIOL J LINN SOC
journal article
 
Soil tardigrades from the Antarctic Peninsula with a description of a new species and some remarks on the genus Ramajendas ( Eutardigrada: Isohypsibiidae)
L. Kaczmarek, Karel Janko, J. Smykla, L. Michalczyk
Year: 2014, POLAR RECORD
journal article
 
Are parasite load and habitat differences driving forces of spatial distribution of Danubian loach Cobitis elongatoides and its hybrid clones?
Jan Kotusz, Marcin Popiolek, Pavel Drozd, Koen De Gelas, Věra Šlechtová, Karel Janko ... other authors
Year: 2013
abstract in proceedings
 
Otostephanos (Rotifera, Bdelloidea, Habrotrochidae) with the description of two new species
Nataliia Iakovenko, E. Kašparová, M. Plewka, Karel Janko
Year: 2013, SYST BIODIVERS
journal article
 
Rise and Persistence of Animal Polyploidy: Evolutionary Constraints and Potential
L. Choleva, Karel Janko
Year: 2013, CYTOGENETIC AND GENOME RESEARCH
journal article
 
Dynamic Formation of Asexual Diploid and Polyploid Lineages: Multilocus Analysis of Cobitis Reveals the Mechanisms Maintaining the Diversity of Clones
Karel Janko, Jan Kotusz, Koen De Gelas, Věra Šlechtová, Zuzana Opoldusová, Pavel Drozd, Lukáš CHOLEVA, Marcin Popiołek, Marian Baláž ... other authors
Year: 2012, PLOS ONE
journal article
 
Do clones degenerate over time? Explaining the genetic variability of asexuals through population genetic models
Karel Janko, Pavel Drozd, Jan Eisner
Year: 2011, BIOL DIRECT
journal article
 
When the worst becomes the best: triploid hybrid loaches replace diploid hybrids despite having lower fitness.
Karel Janko, Jan Eisner, Jan Kotusz, Pavel Drozd
Year: 2010
presentations (congresses, symposia, conferences, workshops)
 
Age-dependent degeneration of clones revisited: weak support from population genetic data
Karel Janko, Pavel Drozd
Year: 2009
presentations (congresses, symposia, conferences, workshops)
 
Evoluční ekologie nepohlavního rozmnožování - revize dosavadního přístupu
Karel Janko, Pavel Drozd
Year: 2009
presentations (congresses, symposia, conferences, workshops)
 
Clonal turnover versus clonal decay: A null model for observed patterns of asexual longevity, diversity and distribution
Karel Janko, Pavel Drozd, Jaroslav Flégr, John Pannel
Year: 2008, Evolution
journal article
 
Clonal turnover versus clonal decay: A null model for observed patterns of asexual longevity, diversity and distribution.
Karel Janko, Pavel Drozd, Jaroslav Flegr, John Pannel
Year: 2007
presentations (congresses, symposia, conferences, workshops)
 
Does the Neutrality Rule the World of Asexuals and Polyploids? The need for appropriate null hypotheses to distinguish betwen the effects of selection and drift.
Karel Janko, Pavel Drozd, John Pannel, Jaroslav Flegr, Jan Eisner
Year: 2007
presentations (congresses, symposia, conferences, workshops)
 
postdok stáž v Musée d'Histoire Naturelle de Paris
Karel Janko
Year:
work experience abroad
 
postdok stáž v Musée d'Histoire Naturelle de Paris
Karel Janko
Year:
work experience abroad
 
výzkumný pobyt na Dept. Biochem. University of Otago a následný pobyt na výzkumné stanici Scott Base
Karel Janko
Year:
work experience abroad
 
Výzkumný pobyt na polární expedici organizované Ústavem Alfreda Wegenera
Karel Janko
Year:
work experience abroad
 
Výzkumný pobyt na polárni stanici Akademik Vernadsky
Karel Janko
Year:
work experience abroad
 
Výzkumný pobyt na polárni stanici Akademik Vernadsky
Karel Janko
Year:
work experience abroad
 
Výzkumný pobyt na stanici James Ross v Antarktidě a následný pobyt na University of Otago, NZ
Karel Janko
Year:
work experience abroad
 

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Author
Title
Type of thesis
Year
Kočí Jan
The evolution of asexuality in space and time on the case of European spined loaches of genus Cobitis
Doctoral thesis
2020
Iakovenko Nataliia
Asexual evolution: causes and mechanisms of reproductive isolation, and the role of geographical and ecological factors in the speciation without sex
Doctoral thesis
2018
Matura Filip
How to clone: is there a gene flow between sexual and asexual species?
Master's thesis
2023
Hořínková Marie
Evolution of diversity of clonal and coexisting sexual communities in space and time
Master's thesis
2020
Muchová Kristýna
Soil rotifer communities in relation to environmental gradients of polar desert
Master's thesis
2017
Tichopád Tomáš
The effect of hybridization and polyploidy on spermatogenic and embryonic processes.
Master's thesis
2017
Bartoš Oldřich
The mechanisms of secondary origin of asexuality and its maintenance; metaanalysis and case study of a model group Cobitis
Master's thesis
2015
Kočí Jan
The effect of parthenogenetic sexual parasites on their sexual host populations: an alternative view on the paradox of sex
Master's thesis
2014
Grécová Andrea
Biodiversity of glacial ecosystems
Bachelor's thesis
2024
Boháček Jan
The evolution of polyploidy and its potential
Bachelor's thesis
2015



Evolution of polyploidy and clonality in hybrid complex of spined loaches (genus Cobitis)
Main solver
Mgr. Karel Janko, Ph.D.
Period
1/2015 - 12/2015
Provider
Specifický VŠ výzkum
State
finished
 
Reproduction mode and a genome: an example of seisonid rotifers (Rotifera: Pararotatoria: Seisonidae)
Main solver
Mgr. Karel Janko, Ph.D.
Period
1/2014 - 12/2014
Provider
Specifický VŠ výzkum
State
finished
 

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