Concept of hybridogeneous speciation of vertebrate animals: complex studies of unisexual species of Reptilia

Abstract

Results of study of unisexual-bisexual complexes from different lizard families have been generalized, using cytogenetic, molecular-cytogenetic data in combination with allozyme, mt-DNA and microsatellite-DNA analysis. These extensive studies of parthenogenetic species of reptiles confirm the concept hypothesis of hybridogeneous speciation of vertebrate animals based on an inter-specific hybridization with forming of a new hybrid unisexual species, clones and forms. Modern researches are considerably extended understanding of evolutionary interrelated phenomena such as hybridization-unisexuality-polyploidy-and ‘balance’ genome. The hybridization may be phylogenetically constrained. An implication of hybridization might be in genome destabilization, and therefore in its rapid diversity, arising of new gene’s variants, of new specific allozyme alleles and microsatellite loci, lacking in parent’s genomes. The implication of unisexuality (in case of its rises) is the maintainance of parental gene block along fixation of new variant of the latter resulting from hybridization.