Abstract:
:We report the karyotype, some aspects of spermatogenesis, and ovarian trophocytes ploidy in three aquatic bug species: Ilyocoris cimicoides (Linnaeus, 1758), Notonecta glauca Linnaeus, 1758, and Diplonychus rusticus Fabricius, 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. In I. 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 in I. cimicoides and N. glauca differ 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 of I. cimicoides and N. glauca. In the ovaries of both species, we studied the level of ploidy in metaphase and interphase trophocytes. In I. 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 with N. glauca was 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.
journal_name
Comp Cytogenetjournal_title
Comparative cytogeneticsauthors
Stoianova D,Simov N,Vu MQ,Nguyen DM,Grozeva Sdoi
10.3897/CompCytogen.v14i1.48709subject
Has Abstractpub_date
2020-03-05 00:00:00pages
139-156issue
1eissn
1993-0771issn
1993-078Xpii
48709journal_volume
14pub_type
杂志文章abstract::Brazilian fish cytogenetics started as early as the seventies in three pioneering research groups, located at the Universidade Estadual Paulista (UNESP, Botucatu, SP), Universidade Federal de São Carlos (UFSCar, São Carlos, SP) and Universidade de São Paulo (USP, São Paulo, SP). Investigations that have been conducted...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i4.14713
更新日期:2017-10-20 00:00:00
abstract::An extreme example of nonrandom rearrangements, especially inversion breaks, is described in the polytene chromosomes of the black fly Simulium bergi Rubtsov, 1956 from Armenia and Turkey. A total of 48 rearrangements was discovered, relative to the standard banding sequence for the subgenus Simulium Latreille, 1802. ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i2.8855
更新日期:2016-06-30 00:00:00
abstract::The B chromosome in the hylid Hypsiboas albopunctatus (2n = 22 + B) is small, almost entirely composed of C-positive heterochromatin, and does not pair with any chromosome of the A complement. B probe, obtained by microdissection and DOP-PCR amplification, was used to search for homology between the B and regular chro...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v8i3.7771
更新日期:2014-08-08 00:00:00
abstract::Synaptonemal complex (SC) chains were revealed in semisterile intraspecific F1 hybrids of Ellobius tancrei Blasius, 1884 (2n = 49, NF=56 and 2n=50, NF=56), heterozygous for Robertsonian (Rb) translocations. Chains were formed by Rb submetacentrics with monobrachial homology. Chromosome synapsis in spermatocytes of the...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i4.5674
更新日期:2015-12-02 00:00:00
abstract::[This corrects the article DOI: 10.3897/CompCytogen.v14i2.49513.]. ...
journal_title:Comparative cytogenetics
pub_type: 已发布勘误
doi:10.3897/CompCytogen.v14i4.56080
更新日期:2020-12-29 00:00:00
abstract::Peanut, Arachis hypogaea (Linnaeus, 1753) is an allotetraploid cultivated plant with two subgenomes derived from the hybridization between two diploid wild species, A. duranensis (Krapovickas & W. C. Gregory, 1994) and A. ipaensis (Krapovickas & W. C. Gregory, 1994), followed by spontaneous chromosomal duplication. To...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i1.20334
更新日期:2018-03-14 00:00:00
abstract::Immunocytochemical and electron microscopic analysis of synaptonemal complexes (SCs) was carried out for the first time in homozygotes and complex Robertsonian heterozygotes (hybrids) of the common shrew, Sorex araneus Linnaeus, 1758, from a newly discovered hybrid zone between the Moscow and the Neroosa chromosomal r...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i3.3701
更新日期:2012-09-14 00:00:00
abstract::Chromosome counts and karyotype characterization have proved to be important features of a genome. Chromosome changes during the diversification of ants might play an important role, given the diversity and success of Formicidae. Comparative karyotype analyses on ants have enriched and helped ant systematics. Among le...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i1.21799
更新日期:2018-01-09 00:00:00
abstract::Agave Linnaeus, 1753 is endemic of America and is considered one of the most important crops in Mexico due to its key role in the country's economy. Cytogenetic analysis was carried out in Agave tequilana Weber, 1902 'Azul', Agave cupreata Trelease et Berger, 1915 and Agave angustifolia Haworth, 1812. The analysis sho...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v7i3.5337
更新日期:2013-08-12 00:00:00
abstract::Chromosome morphometry and nuclear DNA content are useful data for cytotaxonomy and for understanding the evolutionary history of different taxa. However, the chromosome number is the only karyotype aspect reported for the species of Dorstenia so far. In this study, the nuclear genome size of Dorstenia arifolia (Lamar...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i1.6719
更新日期:2016-01-22 00:00:00
abstract::The Tc1 mariner element is widely distributed among organisms and have been already described in different species of fish. The genus Ancistrus (Kner, 1854) has 68 nominal species and is part of an interesting taxonomic and cytogenetic group, as well as presenting a variation of chromosome number, ranging from 2n=34 t...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i1.10519
更新日期:2017-01-20 00:00:00
abstract::Several strains of the apparently well-known cosmopolitan synanthropic parasitoid of coleopteran stored-product pests, Lariophagusdistinguendus (Förster, 1841) from Western Europe, were studied using DNA sequencing and chromosomal analysis. The presence of at least two cryptic species with different COI sequences and ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v13i2.34492
更新日期:2019-06-11 00:00:00
abstract::The genomes of five Agropyron Gaertner, 1770 species were characterized using all potential di- or trinucleotide simple sequence repeat (SSR) motifs and four satellite DNA repeats as fluorescence in situ hybridization (FISH) probes. The sites of 5S and 45S rDNA were relatively conserved among the diploid and tetraploi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i3.13124
更新日期:2017-08-03 00:00:00
abstract::Chromosome morphometry and nuclear DNA content are useful data for cytotaxonomy and to understand the evolutionary history of different taxa. For the genus Bromus Linnaeus, 1753, distinct ploidy levels have been reported, occurring from diploid to duodecaploid species. The geographic distribution of Bromus species has...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v11i2.11572
更新日期:2017-04-07 00:00:00
abstract::The subfamily Harpactorinae is composed of six tribes. Phylogenetic studies bring together some of Harpactorinae tribes, but by and large the data on evolutionary relationships of the subfamily are scarce. Chromosome studies are of great importance for understanding the systematics of different groups of insects. For ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i4.10392
更新日期:2016-12-09 00:00:00
abstract::The centromere is a chromosomal region where the kinetochore is formed, which is the attachment point of spindle fibers. Thus, it is responsible for the correct chromosome segregation during cell division. Telomeres protect chromosome ends against enzymatic degradation and fusions, and localize chromosomes in the cell...
journal_title:Comparative cytogenetics
pub_type: 杂志文章,评审
doi:10.3897/CompCytogen.v14i2.51895
更新日期:2020-07-07 00:00:00
abstract::Phaneropterinae is the largest subfamily of Tettigoniidae, distributed across the globe. There are few cytogenetic studies regarding this group, as in the case of the genus group Aniarae, which represents only two karyotyped species. The current study aims to analyze cytogenetically three species of Hyperophora Brunne...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v13i1.31803
更新日期:2019-04-02 00:00:00
abstract::Variation in the number of chromosomes was revealed in 61 samples of Cimex lectularius Linnaeus, 1758 from the Czech Republic and other European countries, hosted on Myotis Kaup, 1829 (4) and Homo sapiens Linnaeus, 1758 (57). The karyotype of all the specimens of Cimex lectularius analysed contained 26 autosomes and a...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v7i4.6012
更新日期:2013-10-03 00:00:00
abstract::[This corrects the article DOI: 10.3897/CompCytogen.v11i1.10339.]. ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章,已发布勘误
doi:10.3897/CompCytogen.v11i4.21560
更新日期:2017-12-08 00:00:00
abstract::Stingless bees are distributed widely in the tropics, where they are major pollinators of several plant species. In this study, the karyotype of Meliponaquinquefasciata Lepeletier, 1836 was analysed, with emphasis on the presence of B chromosomes. Post-defecating larvae were analysed using Giemsa staining, the C-bandi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v12i4.29165
更新日期:2018-11-09 00:00:00
abstract::The fluorescent in situ hybridization (FISH) technique has been applied to somatic chromosomes in the medicinally important species, Bunium persicum, to elucidate its karyotypes. The bicolour FISH technique involving 18S-5.8S-26S and 5S ribosomal RNA genes as probes was used to assign physical localization and measure...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v5i4.965
更新日期:2011-11-09 00:00:00
abstract::Next-generation sequencing data analysis on Triatoma infestans Klug, 1834 (Heteroptera, Cimicomorpha, Reduviidae) revealed the presence of the ancestral insect (TTAGG)n telomeric motif in its genome. Fluorescence in situ hybridization confirms that chromosomes bear this telomeric sequence in their chromosomal ends. Fu...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v10i3.9960
更新日期:2016-09-13 00:00:00
abstract::We describe the karyotype, location of nucleolus-organizing regions (NORs) and heterochromatin composition and distribution in Lepidochitona caprearum (Scacchi, 1836). The examined specimens had 2n=24 chromosomes; the elements of pairs 1-4 were metacentric, subtelocentric those of the fifth pair, telocentric the eleme...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i4.3722
更新日期:2012-12-12 00:00:00
abstract::Cichlids represent one of the most species-rich families of fishes and have attracted the attention of evolutionary biologists due to the rapid radiation occurring in some groups and the importance of some species in the world aquaculture. Cytogenetic analysis was conducted in 10 cichlid species from the Araguaia Rive...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v6i2.1739
更新日期:2012-04-27 00:00:00
abstract::A lectotype is designated for the Tibetan species Deronectesemmerichi Falkenström, 1936 (Currently Boreonectesemmerichi (Falkenström)), and its habitus, as well as the median lobe and parameres of its aedeagus, are figured along with additional comparative material. Material of Boreonectesemmerichi from Sikkim (BMNH) ...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i1.4463
更新日期:2015-03-31 00:00:00
abstract::The African chironomid Polypedilumvanderplanki Hinton, 1951 is the only chironomid able to withstand almost complete desiccation in an ametabolic state known as anhydrobiosis. The karyotypes of two allopatric populations of this anhydrobiotic chironomid, one from Nigeria and another from Malawi, were described accordi...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v9i2.9104
更新日期:2015-05-11 00:00:00
abstract::Cytogenetic features of the hangingfly Bittacus sinicus Issiki, 1931 were investigated for the first time using C-banding and DAPI (4',6-diamidino-2-phenylindole) staining. The karyotype analyses show that the male B. sinicus possesses the lowest chromosome number (2n = 15) ever observed in Mecoptera, and an almost sy...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v14i3.53533
更新日期:2020-07-30 00:00:00
abstract::Drosophila melanogaster Meigen, 1830 has served as a model insect for over a century. Sequencing of the 11 additional Drosophila Fallen, 1823 species marks substantial progress in comparative genomics of this genus. By comparison, practically nothing is known about the genome size or genome sequences of parasitic wasp...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v5i3.1435
更新日期:2011-08-24 00:00:00
abstract::In the present study, we analyzed individuals of Hypostomus soniae (Loricariidae) collected from the Teles Pires River, southern Amazon basin, Brazil. Hypostomus soniae has a diploid chromosome number of 2n = 64 and a karyotype composed of 12 metacentric (m), 22 submetacentric (sm), 14 subtelocentric (st), and 16 acro...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v13i4.36205
更新日期:2019-12-11 00:00:00
abstract::The karyotypes and the localization of C-bands, clusters of ribosomal DNA and telomeric repeats of 10 species of the family Pamphagidae from Morocco are described for the first time. The species studied belong to the subfamilies Pamphaginae and Thrinchinae. All species have karyotypes consisting of 19 and 20 acrocentr...
journal_title:Comparative cytogenetics
pub_type: 杂志文章
doi:10.3897/CompCytogen.v13i1.32039
更新日期:2019-02-27 00:00:00