Superchromosomal organization and its cytogenetic consequences in the Eukaryota

Chiarelli, B.; Brøgger, Anton

doi:10.1007/bf00120556

Cited by 9 publications

(2 citation statements)

References 143 publications

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“…Our conclusions are in agreement with Du Praw (1970) and Chiarelli and Brogger (1978) hypothesis according to which all nonhomologous chromosomes are connected in an end-to-end fashion, forming a superchromosomal organization characteristic for eukaryotic genome.…”

Section: Discussionsupporting

confidence: 92%

Cytology of polytene chromosomes of Chironomus, Mycetophila and Rhagoletis. I. Superchromosomal organization in polytene nuclei of Chironomus and Mycetophila.

Gavrilă

1983

CYTOLOGIA

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Section: Discussionsupporting

confidence: 92%

Cytology of polytene chromosomes of Chironomus, Mycetophila and Rhagoletis. I. Superchromosomal organization in polytene nuclei of Chironomus and Mycetophila.

Gavrilă

1983

CYTOLOGIA

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“…Due to the fact that the maximal degree of relaxation of DNA fibrils has been encountered in those instances in which the DNA fibrils were not at all in association with RNP particles, we have inferred that the supercoiling of DNA fibrils in mesokaryote chromosome is largely dependent on their associa~ tion with such ribonucleoprotein components. Chromosomal connections between non-homologous chromosomes which have been encountered in our material suggest that, like in typical eukaryotes (DuPRAW 1970;CHIARELLI and BR0GGER 1978;GAVRILA 1983), in dinoflagellates there might exist also a superchromosomal organization of mesokaryote genome.…”

Section: Discussionsupporting

confidence: 56%

The Fine Structure of Mesokaryote Genome: Multiple Nucleolar-Organizing Chromosomes inProrocentrum Micans

Gavrilă

Mihăescu

1986

Caryologia

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Using TEM technique for studying the fine structure of dinoflagellate chromosomes in Prorocentrum micans, we have obtained data supporting the model of stacked series of nested-transversal DNA arcs, held together by a presumable ribonucleoprotein matrix and representing a higher order of organization of a single, or few, very long DNA fibrils folded in a spiral manner around a virtual axis. Both interchromosomal connections and the attachment of chromosomes to the nuclear envelope suggest a superchromosomal organization of the mesokaryote genome, well evidenced when the chromosomes are in a despiralized, relaxed state. We have also obtained proof for the existence of several nucleolar-organizing chromosomes in the same mesokaryote nucleus, all being involved in the organization of the same nucleolus. At the level of nucleolus-organizer region of such NO-chromosomes, DNA fibrils are extensively unfolded, a situation commonly encountered in typical eukaryotes.

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The Karyology of South American Primates and Their Relationship to African and Asian Species

Chiarelli

1980

Evolutionary Biology of the New World Monkeys and Continental Drift

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Superchromosomal organization and its cytogenetic consequences in the Eukaryota

Cited by 9 publications

References 143 publications

Cytology of polytene chromosomes of Chironomus, Mycetophila and Rhagoletis. I. Superchromosomal organization in polytene nuclei of Chironomus and Mycetophila.

Cytology of polytene chromosomes of Chironomus, Mycetophila and Rhagoletis. I. Superchromosomal organization in polytene nuclei of Chironomus and Mycetophila.

The Fine Structure of Mesokaryote Genome: Multiple Nucleolar-Organizing Chromosomes inProrocentrum Micans

The Karyology of South American Primates and Their Relationship to African and Asian Species

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