Eleonora Pustovalova- PhD in biology
- Senior Lecturer at V. N. Karazin Kharkiv National University
Eleonora Pustovalova
- PhD in biology
- Senior Lecturer at V. N. Karazin Kharkiv National University
About
26
Publications
2,113
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
24
Citations
Introduction
Current institution
Publications
Publications (26)
European water frogs from the Pelophylax esculentus complex include two sexual species, P. ridibundus and P. lessonae, and their hybrids, which usually clonally transmit one of the parental species' genomes. This unique reproductive strategy allows hybrids to reproduce with one or both parental species, creating diverse population systems. Unlike m...
Gametogenesis produces gametes as a piece of genetic information transmitted to the offspring. While during sexual reproduction, progeny inherits a mix of genetic material from both parents, asexually reproducing organisms transfer a copy of maternal or paternal DNA to the progeny clonally. Parthenogenetic, gynogenetic and hybridogenetic animals ha...
Developmental anomalies and malformations in amphibians serve as a marker of extreme or unstable environmental conditions and can affect the reproduction and viability of amphibians. In the Czech Republic, anomalies were reported for amphibians from the Elbe and the Danube rivers basins, but not from the Oder River. Here, we report anomalies in thr...
Meiosis is a conservative process in all sexual organisms which ensures fertility and is central for producing genetic diversity by recombination and random segregation of parental chromosomes. Yet unexplored mechanisms may disrupt it and cause loss of sex followed by the emergence of clonal modes of reproduction. Interspecific hybridization is the...
Interspecific hybridization can disrupt canonical gametogenic pathways, leading to the emergence of clonal and hemiclonal organisms. Such gametogenic alterations usually include genome endoreplication and/or premeiotic elimination of one of the parental genomes. The hybrid frog Pelophylax esculentus exploits genome endoreplication and genome elimin...
We propose a modified and updated protocol to obtain mitotic chromosomes from the regenerated tissue of Pelophylax tadpole tail tips. Chromosomal preparations from regenerated tissue results in high-quality and clean slides suitable for further staining and study. Tadpoles remain alive, undergo minimum suffering, and can be grown to adulthood for f...
Pelophylax esculentus is an interspecies hybrid of marsh frog P. ridibundus and pool frog P. lessonae. The hybrids are usually presented by diploid and triploid forms, and coexist and crossbreed with one or both parental species in the hemiclonal population systems (HPS). Siverskyi Donets river basin is known for its diversity of HPS and was descri...
Interspecies hybrid frogs Pelophylax esculentus and one of its parental species Pelophylax ridibundus inhabit the Siversky Donets center of diversity of water frogs in Eastern Ukraine. These frogs can crossbreed and form progeny in population systems which are called hemiclonal (HPS). Such systems have their own exceptional features which make them...
Pelophylax esculentus is an interspecies hybrid of marsh frog P. ridibundus and pool frog P. lessonae. The hybrids are usually presented by diploid and triploid forms, and coexist and crossbreed with one or both parental species in the hemiclonal population systems (HPS). Siverskyi Donets river basin is known for its diversity of HPS and was descri...
We studied composition of Pelophylax esculentus complex representatives from Iskiv pond (81 adult frogs, 7 tadpoles). We estimated ratio of triploid P. esculentus (using erythrocyte cytometry and karyological analysis) and sex proportion (by outer and inner morphological features). Adults were presented only by hybrids and only 2 of them were femal...
We propose hypothesis that defines hemiclonal inheritance as a rare natural evolutional way to overcome interspecies hybrid sterility (as well as clonality and polyploidy). The main consequences of hemiclonal inheritance are clonal evolution of genomes and homological interspecies recombination. On the example of hybridogenic Pelophylax esculentus...
