New data on karyotype, spermatogenesis and ovarian trophocyte ploidy in three aquatic bug species of the families Naucoridae, Notonectidae, and Belostomatidae (Nepomorpha, Heteroptera)
Autor: | Desislava Stoianova, Manh Quang Vu, Nikolay Simov, Snejana Grozeva, Duc Minh Nguyen |
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Rok vydání: | 2020 |
Předmět: |
Paraneoptera
0106 biological sciences Diplonychus rusticus Insecta achiasmate male meiosis (achiasmy) achiasmate male meiosis (achiasmy) B-chromosomes karyotype nurse cells South Europe and Southeast Asia Diplonychus rusticus Ilyocoris cimicoides Notonecta glauca Plant Science Carbotriplurida Condylognatha Notonecta glauca 01 natural sciences Molecular Cytogenetics Lentireduvius Bilateria Nepomorpha B-chromosomes Pterygota Naucoridae biology Cenozoic Notonectidae Heteroptera Hexapoda Cephalornis Karyotype Epipygidae Circumscriptional names Europe Belostomatidae Boltonocostidae Circumscriptional name Ploidy Research Article Coelenterata Biotechnology Asia lcsh:QH426-470 Arthropoda Naucoroidea Nephrozoa 010607 zoology Reproductive biology Notonectoidea Protostomia Basal Zoology Cellular & Organismal genetics Circumscriptional names of the taxon under 010603 evolutionary biology Hemiptera South Europe and Southeast Asia Genetics Animalia Nepoidea nurse cells Eumetabola B chromosome biology.organism_classification karyotype lcsh:Genetics Notchia Ecdysozoa Animal Science and Zoology Ilyocoris cimicoides |
Zdroj: | Comparative Cytogenetics, Vol 14, Iss 1, Pp 139-156 (2020) Comparative Cytogenetics 14(1): 139-156 Comparative Cytogenetics |
ISSN: | 1993-078X 1993-0771 |
Popis: | We report the karyotype, some aspects of spermatogenesis, and ovarian trophocytes ploidy in three aquatic bug species:Ilyocoris cimicoides(Linnaeus, 1758),Notonecta glaucaLinnaeus, 1758, andDiplonychus rusticusFabricius, 1871 from previously unexplored regions – South Europe (Bulgaria) and Southeast Asia (Vietnam). Our results add considerable support for the published karyotype data for these species. InI. cimicoides, we observed achiasmate male meiosis – the first report of achiasmy for the family Naucoridae. More comprehensive cytogenetic studies in other species of the Naucoridae are required to elucidate the role of achiasmy as a character in the systematics of the family.Our observations on the association between phases of spermatogenesis and developmental stages inI. cimicoidesandN. glaucadiffer from the previously published data. In these species, we assume that the spermatogenesis phases are not strongly associated with certain developmental stages. For further cytogenetic studies (on the Balkan Peninsula), we recommend July as the most appropriate month for collection ofI. cimicoidesandN. glauca.In the ovaries of both species, we studied the level of ploidy in metaphase and interphase trophocytes. InI. cimicoides, diploid and tetraploid metaphase trophocytes were found. Heteropycnotic elements, observed in interphase trophocytes of this species, represented the X chromosomes. It allowed us to determine the trophocytes ploidy at interphase (2n was repeated up to 16 times). The situation withN. glaucawas different. The metaphase trophocytes were diploid and we were not able to determine the ploidy of interphase trophocytes since such conspicuous heteropycnotic elements were not found. The scarce data available suggest a tendency for a low level of trophocyte ploidy in the basal infraorders (Nepomorpha and Gerromorpha) and for a high level in the more advanced Pentatomomorpha. Data about this character in species from other infraorders are needed to confirm that tendency. |
Databáze: | OpenAIRE |
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