A5061734382- Genetic diversity and population structure
- Amphibian and Reptile Biology
- Chromosomal and Genetic Variations
- Evolution and Genetic Dynamics
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Genomics and Phylogenetic Studies
- Bat Biology and Ecology Studies
- Spider Taxonomy and Behavior Studies
- Plant and animal studies
- Viral Infectious Diseases and Gene Expression in Insects
- Plant Virus Research Studies
- Identification and Quantification in Food
- Sperm and Testicular Function
- Plant Reproductive Biology
- Cell Image Analysis Techniques
- Animal Behavior and Reproduction
Czech Academy of Sciences, Institute of Animal Physiology and Genetics
2018-2025
Institute of Animal Physiology of the Slovak Academy of Sciences
2022-2025
Czech Academy of Sciences, Institute of Vertebrate Biology
2023
University of Ostrava
2022
Charles University
2018-2020
Abstract The distribution of the neutral component genetic diversity is interplay historical and ongoing processes resulting in species‐specific structure populations, which can, however, be disrupted by interspecific hybridisation introgression. In this study, we focused on two species water frogs, Pelophylax epeiroticus P. kurtmuelleri , live sympatry southwestern Balkans, to investigate rate population using cytogenetic, mitochondrial (ND2) nuclear DNA (microsatellite) markers. overall...
It has been empirically established that genome mixing between divergent species can trigger meiotic aberrations, ultimately leading to the emergence of asexual reproduction through production unreduced gametes in various metazoan lineages. Yet, it remains poorly understood how such hybrids cope with co-inherited differences sex determination systems, diverged regulatory networks, and chromosomal incompatibilities, especially context increased ploidy. Addressing these questions requires...
<title>Abstract</title> The molecular processes underlying genome exclusion and clonal gamete formation in the germline of hybridogenetic water frog hybrids are poorly understood. For first time, we have characterized coding sequences 160 gametogenic genes from European species <italic>Pelophylax lessonae</italic> (LL) ridibundus</italic> (RR). In addition, single nucleotide polymorphisms (SNPs) 52 these were analyzed both (60 LL, 252 RR) their hybrid, esculentus</italic> (340 LR),...
The genus Pelophylax (water frogs) includes relatively common, widely distributed, and even invasive species, but also endemic taxa with small ranges limited knowledge concerning their ecology evolution. Among poorly studied species belong endemics of the southwestern Balkans, namely shqipericus , P. epeiroticus kurtmuelleri . In this study, we focused on genetic variability these aiming to reveal phylogeographic patterns Quaternary history. We used 1,088 published newly obtained sequences...
Sexual parasites offer unique insights into the reproduction of unisexual and sexual populations. Because unisexuality is almost exclusively linked to female sex, most studies addressed host-parasite dynamics in populations where sperm-dependent females dominate. Pelophylax water frogs from Central Europe include hybrids both sexes, collectively named P. esculentus. They live syntopically with their parental species lessonae and/or ridibundus. Some hybrid lineages consist all males providing...
Spiders are an intriguing model to analyse sex chromosome evolution because of their peculiar multiple X systems. Y chromosomes were considered rare in this group, arising after neo-sex formation by chromosome-autosome rearrangements. However, recent findings suggest that more common spiders than previously thought. Besides chromosomes, they also involved the ancient X1X2Y system haplogyne spiders, whose origin is unknown. Furthermore, seem exhibit obligatorily one or two pairs cryptic...
Interspecific hybridization may trigger the transition from sexual reproduction to asexuality, but mechanistic reasons for such a change in hybrid's are poorly understood. Gametogenesis of many asexual hybrids involves stage premeiotic endoreplication (PMER), when gonial cells duplicate chromosomes and subsequent meiotic divisions involve bivalents between identical copies, leading production clonal gametes. Here, we investigated triggers PMER whether its induction is linked intrinsic...
Abstract Karyotype divergence may strongly affect the degree of hybridization between species. Western Palearctic slow worms (Anguis) are legless lizards forming different types secondary contact zones. To identify level chromosomal variation in worms, we examined karyotype multiple populations all species except one and Pseudopus apodus as an outgroup. We applied conventional molecular cytogenetic methods whole-chromosome painting using macrochromosome probes from Varanus komodoensis to...
Abstract Hybridogenesis is a reproductive tool for sexual parasitism. Hybridogenetic hybrids use gametes from their host own reproduction, but species gain no benefit such matings as genome later eliminated. Here, we examine the presence of parasitism in water frogs through crossing experiments and genome-wide data. We specifically focus on famous Central-European populations where Pelophylax esculentus males (hybrids P. ridibundus lessonae ) live with ridibundus. identified system commonly...
Background: Hybrid taxa exist in nature, but their fitness can vary greatly. Hybrids are usually thought to have lower viability and survival rate than parental species due the occurrence of two different genomes divergent evolution each species. On other hand, hybrid vigour F1 generation may give hybrids an advantage mixed populations where they live compete with taxa. Post-zygotic selection endogenous genetic mechanisms be a significant evolutionary force formation. Here we tested...
ABSTRACT Meiosis is a conservative process in all sexual organisms which ensures fertility and central for producing genetic diversity by recombination random segregation of parental chromosomes. Yet unexplored mechanisms may disrupt it cause ‘loss sex’ followed the emergence clonal modes reproduction. Interspecific hybridization primary trigger this process, but mechanistic basis transition to asexuality remains still unknown most vertebrate animals. To study these processes water frogs, we...
European water frogs from the Pelophylax esculentus complex include two sexual species, P. ridibundus and lessonae, their hybrids, which usually clonally transmit one of parental species' genomes. This unique reproductive strategy allows hybrids to reproduce with or both creating diverse population systems. Unlike most well-studied systems in Europe, Siverskyi Donets River basin Eastern Ukraine features diploid polyploid coexisting ridibundus, while lessonae is absent (R-E systems). To...
Abstract Karyotype divergence may strongly affect the rate of hybridization between species in their secondary contact zones. Slow worms ( Anguis , Anguidae) are morphologically relatively cryptic legless lizards representing two evolutionary lineages, A. cephallonica from southernmost Balkans, and fragilis complex (comprising sister-species pairs + veronensis colchica graeca ) distributed Western Palearctic. To identify level chromosomal variation, we surveyed karyotype all except formerly...
Abstract Interspecific hybridization may trigger the transition from sexual reproduction to asexuality, but mechanistic reasons for such a change in hybrid’s are poorly understood. Gametogenesis of many asexual hybrids involves stage premeiotic endoreduplication (PMER), when gonial cells duplicate chromosomes and subsequent meiotic divisions involve bivalents between identical copies, leading production clonal gametes. Here, we investigated triggers PMER whether its induction is linked...