Globalization and increasing human impact on natural aquatic systems have facilitated the
movement of species and the establishment of nonindigenous species enhancing …

Sex is determined genetically in amphibians; however, little is known about the sex
chromosomes, testis-determining genes, and the genes involved in testis differentiation in …

Approximately 99.9% of vertebrate species reproduce sexually. The exceptional 0.1%
reproduce via asexual or clonal means, which vary wildly and are fascinating in their own …

Background Triploid individuals often play a key role in speciation by hybridization. An
understanding of the gamete types (ploidy and genomic content) and stability of hybrid …

The edible frog, Pelophylax esculentus, is a hybrid form that reproduces via clonal
propagation of only one of the parental genomes through generations of hybrids while the …

Hybridization and polyploidy play an important role in animal speciation. European water
frogs of the Pelophylax esculentus complex demonstrate unusual genetic phenomena …

Current understanding of the population genetics of free-living unicellular eukaryotes is
limited, and the amount of genetic variability in these organisms is still a matter of debate …

Hybridogenesis is a hemiclonal reproductive strategy in diploid and triploid hybrids. Our
study model is a frog P. esculentus (diploid RL and triploids RLL and RRL), a natural hybrid …

Background Hybridogenesis can represent the first stage towards hybrid speciation where
the hybrid taxon eventually weans off its parental species. In hybridogenetic water frogs, the …

Many closely related species are capable of mating to produce hybrid offspring, which are
usually sterile. Nevertheless, altering the gametogenesis of hybrid offspring can rescue …