Comparative Cytogenetics

17/07/2024

This study reports the first identification of the Chironomus nuditarsis species in Sevan Lake, Armenia, confirmed through morphological, cytogenetic, and molecular genetic analyses.

https://doi.org/10.3897/compcytogen.18.126130

03/07/2024

Comparative Cytogenetics has received a new Journal Impact Factor:

The 2023 Journal Impact Factor (JIF) for Comparative Cytogenetics stands at 1, according to the latest Web of Science data, reports ARPHA Platform’s Indexing team.  In late June, Clarivate released the 2024 Journal Citation Report (JCR). The report reflects how many times content publishe...

27/06/2024

Physical chromosomal mapping of major ribosomal genes in 15 ant species with a review of hypotheses regarding evolution of the number and position of NORs in ants.

https://doi.org/10.3897/compcytogen.18.125235

Unifap-Oficial

Recently, hypotheses regarding the evolutionary patterns of ribosomal genes in ant chromosomes have been under discussion. One of these hypotheses proposes a relationship between chromosomal location and the number of rDNA sites, suggesting that terminal locations facilitate the dispersion of rDNA c...

25/06/2024

Our new Scopus CiteScore is 2.4, an improvement from last year.

https://compcytogen.pensoft.net/news/613

24/06/2024

This study analyses the chromosomal karyotype of Quasipaa spinosa from Hunan Province, China.

The current study analyzed the chromosomal karyotype of Quasipaa spinosa David, 1875 from Hunan Province, China. The karyotype, C-banding, BrdU-banding pattern were characterized using direct preparation of bone-marrow cells and hemocyte cultures. The findings indicated that Q. spinosa was a diploid...

20/05/2024

First detailed molecular cytogenetic karyotypes of four Solomon's seal species reveal significant karyotypic variations and evolutionary relationships based on chromosome measurements and rDNA FISH signals.

To characterize the chromosomes of the four species of Polygonatum Miller, 1754, used in traditional Chinese medicine, P. cyrtonema Hua, 1892, P. kingianum Collett et Hemsley, 1890, P. odoratum (Miller, 1768) Druce, 1906, and P. sibiricum Redouté, 1811, and have an insight into the karyotype variat...

09/05/2024

Interphase nuclei, karyotypes and nuclear DNA amounts in five species of the palm genus Oenocarpus.

🔗 https://doi.org/10.3897/compcytogen.18.117597

UFLA - Universidade Federal de Lavras

10/04/2024

The role of cellular polyploidy in the regeneration of the cirrhotic liver in rats and humans.

https://doi.org/10.3897/compcytogen.18.121459

08/02/2024

Exploring chromatin diminution in C. kolensis, this study proposes the process as a universal mechanism of genome reduction, shedding light on non-coding DNA and its role in speciation and genetic isolation.

https://doi.org/10.3897/compcytogen.17.112152

25/01/2024

New research details the karyotype, C-banding, and DNA marker localisation in Skwala compacta, offering insights into the cytogenetic characteristics of the stonefly species.

This study provides data on chromosome number (2n♂♀=26), s*x determination mechanism (XY♂/XX♀), C-banding pattern, distribution of clusters of telomeric TTAGG repeats and 18S ribosomal DNA in the karyotype of the stonefly Skwala compacta (McLachlan, 1872). For the first time in the history o...

23/01/2024

Study explores how specific chromosome characteristics affect the segregation patterns in embryos from couples with autosomal reciprocal translocations, offering insights to enhance IVF outcomes.

Patterns of meiotic chromosome segregation were analyzed in cleavage stage and blastocyst stage human embryos from couples with autosomal reciprocal translocations (ART). The influence of quadrivalent asymmetry degree, the presence of terminal breakpoints, and the involvement of acrocentric chromoso...

29/12/2023

New research on Arge sawflies reveals diverse chromosome numbers and structures, aiding in understanding their taxonomy and phylogeny.

Results of the chromosome study of 12 sawfly species of the genus Arge Schrank, 1802 are reviewed, including new data on the karyotypes of A. ciliaris (Linnaeus, 1767) and A. enodis (Linnaeus, 1767) with n = 10. Moreover, the same chromosome number, n = 10, is found in A. ustulata (Linnaeus, 1758),....

29/12/2023

Robert B. Angus of the Natural History Museum, London provides an updated Atlas of Helophorus chromosomes.

An account is given of my development of techniques to obtain well-spread Giemsa-stained banded chromosome preparations. Apparent G-banding could be obtained following very slight trypsin treatment of freshly prepared slides, but this banding was very fine (close-grained) and possibly not a reflecti...

19/12/2023

Study on Nysius genus reveals unexpected karyotype diversity.

Read more:

We studied the karyotype and chromosomal distribution of 18S rDNA clustered in nucleolar organizer regions (NORs) in Nysius graminicola (Kolenati, 1845), belonging to the subfamily Orsillinae (Lygaeidae). It is shown that this species has a karyotype with 2n = 22(18+mm+XY), previously known in only....

18/12/2023

Study reveals the karyotype and reproductive traits of the unique symbiotic mealybug Orbuspedum machinator, showing a diploid chromosome number of 18 in females and probable bis*xual reproduction.

https://doi.org/10.3897/compcytogen.17.116550

12/12/2023

🎉 Comparative Cytogenetics joins ResearchGate!

👉 Find our dedicated profile on the platform used by 25 million researchers worldwide!

Content published in Comparative Cytogenetics is now being automatically added to the ResearchGate as soon as it appears in the journal, in order to directly reach to 25 million researchers currently using the specialised network. As part of a recently announced partnership, Comparative Cytogenetics...

06/12/2023

This study reveals the first karyotype description of five Neotropical species of the genus Drosophila.

https://doi.org/10.3897/compcytogen.17.108265

PUCE_Ecuador

The mitotic metaphases of five Andean species of genus Drosophila are described for the first time. The evolutionary and interspecific genetic relationships within three Neotropical Drosophila species groups are analyzed. The diploid chromosome number for each species is as follows: D. cashapamba C....

14/11/2023

Cell culture and karyotypic description of the red-backed toadlet from the New South Wales Central Coast.

https://doi.org/10.3897/compcytogen.17.113526

The University of Melbourne The University of Newcastle, Australia

06/11/2023

This paper aims to estimate the divergence of the karyotype structure between and within the phylogenetically distant lineages of the family Distichodontidae.

Read more: https://doi.org/10.3897/compcytogen.17.107744

Ethiopian Institute of Agricultural Research - EIAR

01/11/2023

“The current stage of the chromosome research on Hymenoptera represents a transition from Hymenoptera cytogenetics to cytogenomics.”

https://doi.org/10.3897/compcytogen.17.112332

25/10/2023

A study on ancient reproductive modes and the criteria of multicellularity proposes further dividing the reproduction of multicellular organisms into monocytic and polycytic.

It is demonstrated that the initial method of fertilization in animals (Metazoa), embryophyte plants (Embryophyta), most groups of multicellular oogamous algae, oogamous and pseudoogamous multicellular fungi was internal fertilization (in the broad meaning) in/on the body of a maternal organism. Acc...

27/09/2023

A study of the karyotypes and chromosomal characteristics of two cypriniform fishes, Hypsibarbus malcolmi and H. wetmorei, using conventional and molecular cytogenetics: https://doi.org/10.3897/compcytogen.17.107703

Khon Kaen University - มหาวิทยาลัยขอนแก่น มหาวิทยาลัยราชภัฏมหาสารคาม Universitätsklinikum Jena

31/08/2023

The complete chloroplast genome of Rhododendron mariesii, a typical member of the family Ericaeae with valuable medicinal and horticultural properties, was sequenced and assembled: https://doi.org/10.3897/compcytogen.17.101427

24/07/2023

The karyotype of the freshwater fish Sabanejewia bulgarica, from the Danube Delta, was studied by conventional Giemsa staining and the C-banding technique. Here are the results: https://doi.org/10.3897/compcytogen.17.103152

Česká zemědělská univerzita v Praze Ústav živočišné fyziologie a genetiky AV ČR

07/06/2023

🔬🧅🇮🇳 A comprehensive summary of cytogenetic characters has been presented for Indian species of Allium: https://doi.org/10.3897/CompCytogen.17.98903

17/05/2023

Discovered accidentally during a genetic investigation, this is Leptidea sinapis ssp. tabarestana, a new subspecies of butterfly. Read more about it here: https://doi.org/10.3897/compcytogen.17.102830

Università degli Studi di Padova Oulun yliopisto - University of Oulu Biologické centrum AVČR Universitatea din Bucureşti Universitat Pompeu Fabra - Barcelona

25/04/2023

A comparative analysis of Ae. comosa subsp. comosa and subsp. heldreichii on a broad sample of accessions of different geographical origins using FISH with fifteen DNA probes and electrophoretic analysis of seed storage proteins (gliadins): https://doi.org/10.3897/CompCytogen.17.101008

24/04/2023

A cytogenetic study of the fire ant species Solenopsis saevissima from Ouro Preto, Minas Gerais, Brazil: https://doi.org/10.3897/compcytogen.17.100945

UFOP - Universidade Federal de Ouro Preto

20/03/2023

🍈🧬 Detailed karyotypes of eight Cucurbitaceae crops were reconstructed using the dataset of chromosome measurements, fluorochrome bands and 45S rDNA FISH signals.

Read more here: https://doi.org/10.3897/compcytogen.v17.i1.99236

28/02/2023

The karyotype differentiation of seven members of the N. ugandensis species group was examined by conventional karyotyping. See the results here: https://doi.org/10.3897/compcytogen.v7.i1.97165

Ústav živočišné fyziologie a genetiky AV ČR