Results 31 to 40 of about 1,418 (178)

Meiosis Progression and Recombination in Holocentric Plants: What Is Known?

Frontiers in Plant Science, 2021
Differently from the common monocentric organization of eukaryotic chromosomes, the so-called holocentric chromosomes present many centromeric regions along their length.
Paulo G. Hofstatter, Gokilavani Thangavel, Marco Castellani, André Marques   +3 more
doaj   +1 more source

Holocentromeres can consist of merely a few megabase-sized satellite arrays

Nature Communications, 2023
The centromere is the chromosome region where microtubules attach during cell division. In contrast to monocentric chromosomes with one centromere, holocentric species usually distribute hundreds of centromere units along the entire chromatid.
Yi-Tzu Kuo, Amanda Souza Câmara, Veit Schubert, Pavel Neumann, Jiří Macas, Michael Melzer, Jianyong Chen, Jörg Fuchs, Simone Abel, Evelyn Klocke, Bruno Huettel, Axel Himmelbach, Dmitri Demidov, Frank Dunemann, Martin Mascher, Takayoshi Ishii, André Marques, Andreas Houben   +17 more
doaj   +1 more source

Holocentric Chromosomes of Luzula elegans Are Characterized by a Longitudinal Centromere Groove, Chromosome Bending, and a Terminal Nucleolus Organizer Region [PDF]

, 2011
The structure of holocentric chromosomes was analyzed in mitotic cells of Luzula elegans. Light and scanning electron microscopy observations provided evidence for the existence of a longitudinal groove along each sister chromatid.
Houben, A., Kumke, K., K. Nagaki, Murata, M., S. Heckmann, G. Wanner, K. Kumke, Wanner, Gerhard, Heckmann, S., Nagaki, Kiyotaka, Schroeder-Reiter, E., L. Ma, Ma, L., E. Schroeder-Reiter, M. Murata, A. Houben   +15 more
core   +1 more source

Stretching the Rules: Monocentric Chromosomes with Multiple Centromere Domains [PDF]

, 2012
The centromere is a functional chromosome domain that is essential for faithful chromosome segregation during cell division and that can be reliably identified by the presence of the centromere-specific histone H3 variant CenH3.
Elizabeth Schroeder-Reiter, Schroeder-Reiter, Elizabeth, Chocholova, Eva, Neumann Pavel, Novák Petr, Petr Novák (2448673), Navrátilová Alice, Wanner, Gerhard, Macas Jiří, Gerhard Wanner (40161), Petr Novák, Koblížková Andrea, Jiří Macas (84231), Pavel Neumann, Steinbauerova, Veronika, Navratilova, Alice, Elizabeth Schroeder-Reiter (156901), Andrea Koblížková, Eva Chocholová (156910), Veronika Steinbauerová, Alice Navrátilová (84233), Macas, Jiri, Pavel Neumann (84232), Andrea Koblížková (156904), Neumann, Pavel, Koblizkova, Andrea, Eva Chocholová, Schroeder-Reiter Elizabeth, Wanner Gerhard, Jiří Macas, Veronika Steinbauerová (156907), Novak, Petr, Alice Navrátilová, Gerhard Wanner, Steinbauerová Veronika, Chocholová Eva   +35 more
core   +1 more source

Cytogenetic Analysis of the Holocentric Chromosomes of the Aphid Schizaphis Graminum [PDF]

Hereditas, 2004
Chromatin organization in the holocentric chromosomes of the aphid Schizaphis gruminum has been investigated at a cytological level after C-banding, NOR, Giemsa, DAPI and CMA, staining. C-banding technique showed the presence of numerous C bands on the two X chromosomes both in telomeric and intercalary regions, whereas autosomes show a small number of
MANDRIOLI, Mauro, Ganassi S, Bizzaro D, MANICARDI, Gian Carlo   +3 more
openaire   +1 more source

Chromosome Centromeres: Structural and Analytical Investigations with High Resolution Scanning Electron Microscopy in Combination with Focused Ion Beam Milling [PDF]

, 2009
Whole mount mitotic metaphase chromosomes of different plants and animals were investigated with high resolution field emission scanning electron microscopy (FESEM) to study the ultrastructural organization of centromeres, including metacentric ...
Schroeder-Reiter, E., Wanner, Gerhard
core   +1 more source

Epigenetic histone marks of extended meta-polycentric centromeres of Lathyrus and Pisum chromosomes

Frontiers in Plant Science, 2016
Species of the legume genera Lathyrus and Pisum possess chromosomes that exhibit a unique structure of their centromeric regions, which is clearly apparent during metaphase by the formation of extended primary constrictions which span up to a third of ...
Pavel eNeumann, Veit eSchubert, Iva eFuková, Jasper Eugene Manning, Andreas eHouben, Jiri eMacas   +5 more
doaj   +1 more source

Spermatogenesis and nucleolar activity in Triatoma klugi (triatomine, Heteroptera)

Genetics and Molecular Biology, 2008
Triatoma klugi is a Chagas disease vector in the Rio Grande do Sul State. Triatominae chromosomes are holocentric and sex chromosomes segregation is post-reductional. In this paper we describe the karyotype of male T.
Laiana Cristina da Costa, Maria Tercília Vilela de Azeredo-Oliveira, Ester Tartarotti   +2 more
doaj   +1 more source

Cytogenetics as a tool for Triatomine species distinction (Hemiptera-Reduviidae)

Memorias do Instituto Oswaldo Cruz, 1992
Several cytogenetic traits were tested a species diagnostic characters on five triatomine species: Rhodnius pictipes, R. nasutus, R. robustus, Triatoma matogrossensis and T. pseudomaculata. Four of them are described for the first time.
Ruben Perez, Yanina Panzera, Sandra Scafiezzo, Maria Cristina Mazzella, Francisco Panzera, Jean Pierre Dujardin, Ekaterina Scvortzoff   +6 more
doaj   +1 more source

Conservation of HP1 and methylated H3 histones as heterochromatic epigenetic markers in the holocentric chromosomes of the cabbage moth, Mamestra brassicae (Lepidoptera)

European Journal of Entomology, 2005
The methylated H3 histone and heterochromatin protein 1 (HP1) are markers of heterochromatin in several eukaryotes possessing monocentric chromosomes. In order to confirm that these epigenetic markers of heterochromatin are evolutionary conserved, the ...
Federica BORSATTI, Mauro MANDRIOLI
doaj   +1 more source