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
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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