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Neocentrics and Holokinetics (Holocentrics): Chromosomes out of the Centromeric Rules
Cytogenetic and Genome Research, 2010The centromere appears as a single constriction at mitotic metaphase in most eukaryotic chromosomes. Holokinetic chromosomes are the exception to this rule because they do not show any centromeric constrictions. Holokinetic chromosomes are usually forgotten in most reviews about centromeres, despite their presence in a number of animal and plant ...
M, Guerra +6 more
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Similar Sister Chromatid Arrangement in Mono- and Holocentric Plant Chromosomes
Cytogenetic and Genome Research, 2016Due to the X-shape formation at somatic metaphase, the arrangement of the sister chromatids is obvious in monocentric chromosomes. In contrast, the sister chromatids of holocentric chromosomes cannot be distinguished even at mitotic metaphase. To clarify their organization, we differentially labelled the sister chromatids of holocentric <i>Luzula&
Veit, Schubert +3 more
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Holocentric chromosomes may be an apomorphy of Droseraceae
Plant Systematics and Evolution, 2018Holocentric chromosomes have evolved in various plant and animal taxa, which suggests they may confer a selective advantage in certain conditions, yet their adaptive potential has scarcely been studied. One of the reasons may reside in our insufficient knowledge of the phylogenetic distribution of holocentric chromosomes across eukaryotic phylogeny. In
Pavel Kolodin +7 more
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Double-strand breaks repair by gene conversion in silkworm holocentric chromosomes
Molecular Genetics and Genomics, 2011Maintenance of genome stability relies on the accurate repair of DNA double-strand breaks (DSBs) that arise during DNA replication or introduced by DNA-damaging agents. Failure to repair such breaks can lead to the introduction of mutations and chromosomal translocations.
Hiroaki, Mon +3 more
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Pest Arthropods with Holocentric Chromosomes are More Resistant to Sterilizing Ionizing Radiation
Radiation Research, 2019It has been hypothesized that species with holocentric chromosomes have a selective evolutionary advantage for developmental and reproductive success because holocentric chromosomes are less susceptible to chromosome breakage than monocentric chromosomes.
František, Zedek, Petr, Bureš
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Chromosome Research, 1995
C-banded karyotypes, DNA content and the male meiiotic process of Triatoma platensis and Triatoma delpontei are compared with those of Triatoma infestans, the main vector of Chagas disease in South America. These three species present the same diploid chromosome number 2n = 22 (20 autosomes + XX male/XY female).
F, Panzera +5 more
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C-banded karyotypes, DNA content and the male meiiotic process of Triatoma platensis and Triatoma delpontei are compared with those of Triatoma infestans, the main vector of Chagas disease in South America. These three species present the same diploid chromosome number 2n = 22 (20 autosomes + XX male/XY female).
F, Panzera +5 more
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Multiple Locations of the rDNA Sites in Holocentric Chromosomes of Rhynchospora (Cyperaceae)
Chromosome Research, 1998Several cytogenetic studies have shown that representatives of the family Cyperaceae have holocentric chromosomes. Despite their interesting chromosome morphology, the chromosome organization has not been studied. This paper reports on the number and distribution of 18S-5.8S-26S ribosomal RNA sites by fluorescence in situ hybridization in eight ...
A L, Vanzela +4 more
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Cytogenetic analysis on holocentric chromosomes in the aphid Schizaphis graminum
1999Chromatin 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 M +3 more
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