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Selective sweep of Wolbachia and parthenogenetic host genomes – the example of the weevil Eusomus ovulum
- M. Mazur, M. Holecová, D. Lachowska-Cierlik, A. Lis, D. Kubisz, Ł. Kajtoch
- BiologyInsect molecular biology
- 1 July 2016
The lack of heterozygosity in host nuclear genes, missing bisexual populations and selective sweep between the parthenogenetic host and bacteria genomes suggest that parthenogenesis in this species could have originated as a result of infection rather than hybridization.
C-bands on chromosomes of 32 beetle species (Coleoptera: Elateridae, Cantharidae, Oedemeridae, Cerambycidae, Anthicidae, Chrysomelidae, Attelabidae and Curculionidae).
C-banding patterns of 32 beetle species from the families Elateridae, Cantharidae, Oedemeridae, Cerambycidae, Anthicidae, Chrysomelidae, Attelabidae and Curculionidae confirmed that most of the beetle species possess a small amount of heterochromatin and C-positive segments are weakly visible in pachytene stages and weakly or imperceptible in mitotic and meiotic metaphases.
Cytogenetic differences between Peritelus familiaris and Centricnemus leucogrammus (Coleoptera: Curculionidae: Entiminae: Peritelini)
Results indicate the usefulness of cytoge- netic methods in taxonomic evaluations and show significant differences in karyotype structure of Centricnemus leucogrammus and Peritelus familiaris.
New data on the cytology of parthenogenetic weevils (Coleoptera, Curculionidae)
The C-banding method showed that only two species possess a large amount of heterochromatin visible as a band around the centromere during mitotic metaphase, which supports the hypothesis that the evolution of apomictic parthenogenesis in weevils has proceeded through a stage of automixis.
Karyotype analysis of three weevil species from the Genera Brachysomus (Boheman, 1845) and Strophosoma Billberg, 1820 (Coleoptera, Curculionidae).
The karyotype structures of the two bisexual and one parthenogenetic species are described for the first time and Geographic parthenogenesis in Brachysomus hirtus is briefly discussed.
Cytogenetic analysis of Otiorhynchus bisulcatus (Fabricius, 1781) and O.(Zadrehus) atroapterus (De Geer, 1775) (Coleoptera, Curculionidae, Entiminae) using C bands, NORs, and DAPI/CMA3 staining.
The structure of the karyotypes of two Otiorhynchus species belonging to separate subgenera is compared and described for the first time and the main differences involve the morphology of autosomes and the X chromosome in the C-banding pattern and DAPI/CMA3 signals as well as in the presence of additional B chromosomes.
Using host species traits to understand the Wolbachia infection distribution across terrestrial beetles
Verification of Wolbachia infection status across 297 beetle taxa showed that approximately 27% of taxa are infected by supergroups A and B, and only minor support for coevolution between bacteria and its beetle hosts was observed in some genera of beetles.
C-banding karyotype and NORs analyse in eight species of Barypeithes Duval from Central Europe (Coleoptera, Curculionidae, Entiminae)
Karyotypes of eight species belonging to the genus Barypeithes were studied using standard Giemsa staining, AgNOR- and C-banding techniques, finding heterochromatin visualized by Cbanding limited almost to the pericentromeric region of all chromosomes with differences in their amount.
Chromosome numbers, C-banding patterns and sperm of some ladybird species from Central Europe (Coleoptera, Coccinellidae).
C-banded karyotypes were studied in the males of seven ladybird species from the subfamily Coccinellinae, showing only a paracentromeric position of constitutive heterochromatin in all autosomes and the sex chromosome X, while the y heterochrome is dot-like and wholly euchromatic.
Heterochromatic banding patterns on chromosomes of twelve weevil species (Insecta, Coleoptera, Curculionoidea: Apionidae, Curculionidae).
The C-banding patterns of twelve weevil species are presented and confirm the existence of two groups of species: with a small or large amount of heterochromatin in the karyotype and much larger heteropicnotic parts of chromosomes visible during all nuclear divisions.