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Holocentric chromosome behaviour inCuscuta (Cuscutaceae)
Plant Systematics and Evolution, 1994The present study demonstrates thatCuscuta babylonica Choisy has holocentric chromosomes. Evidence for this phenomenon comes from three different observations. (1) Mitosis: During metaphase and anaphase the sister-chromatids are situated parallel to the equatorial plane with no sign of localized kinetochore activity.
Batia Pazy, Uzi Plitmann
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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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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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Holocentric chromosomes in meiosis. II. The modes of orientation and segregation of a trivalent
Chromosome Research, 2006The modes of orientation and segregation of the sex chromosome trivalent X1X2Y in male meiosis of Cacopsylla mali (Psylloidea, Homoptera) were analysed. Males with an X1X2Y sex chromosome system coexist with males displaying a neo-XY system in populations of this species.
S, Nokkala +3 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 in meiosis. I. Restriction of the number of chiasmata in bivalents
Chromosome Research, 2004The number of chiasmata in bivalents and the behaviour of chiasmata during the meiotic divisions were studied in Psylla foersteri (Psylloidea, Homoptera). Two chiasmata with a frequency of 97% and one or three chiasmata with frequencies of 2% and 0.9%, respectively, were observed in the largest bivalent in male meiosis.
S, Nokkala +3 more
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Chromosome Research, 2000
The meiotic behaviour of the X chromosome and one autosomal pair of the heteropteran Triatoma infestans was analysed by means of C-banding plus DAPI staining. At first metaphase, the X univalent is oriented with its long axis parallel to the equatorial plate, which suggests a holocentric interaction with the spindle fibres.
R, Pérez +4 more
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The meiotic behaviour of the X chromosome and one autosomal pair of the heteropteran Triatoma infestans was analysed by means of C-banding plus DAPI staining. At first metaphase, the X univalent is oriented with its long axis parallel to the equatorial plate, which suggests a holocentric interaction with the spindle fibres.
R, Pérez +4 more
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Highly-repeated DNA in Luzula : an organism with holocentric chromosomes
1982Thesis (Ph.D.) -- La Trobe University, 1982.; Submitted to Dept. of Genetics and Human Variation, School of Biological Sciences.
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