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rDNA magnification in D. melanogaster: State of rDNA copies following the first step
Molecular and General Genetics MGG, 1979D. melanogaster males of XYbb/O genetic constitution undergoing rDNA magnification were mated singly to XXbb+/O females, yielding XYbb/O male progeny, and to XNO- w sn bb+ females, yielding XYbb/XNO- females. The male and female offspring were scored for the bb+ phenotype.
Graziani F, LA MANTIA, GIROLAMA
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Quantitative studies of rDNA in amphibians
Journal of Cell Science, 1977ABSTRACT The proportion, of the genome that is complementary to 18 and 28 s has been determined for 12 species of amphibians. The group of species chosen for the experiment includes 5 related species belonging to the same genus (Plethodon) as well as species belonging to distant taxonomic groups whose C-values range from 3 to 62 pg.
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Ribosomal RNA and rDNA sequence analyses
Gene, 1992The potential of ribosomal (r) RNA and the encoding genes (rDNA) to elucidate natural relationships has been dramatically extended by improved sequencing approaches and the application of polymerase chain reaction. Sequence information on 16S and 23S rRNA/DNA from 69 strains of 53 Streptomyces species allows determination of regions that can be used as
Stackebrandt, Erko +2 more
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Chromosoma, 1997
Ribosomal DNA (rDNA) variation in the species Triturus vulgaris meridionalis (Amphibia, Urodela) is remarkable because of unusually high intraspecific variability in the number and distribution of ribosomal loci in the karyotype; in addition, portions of the intergenic spacer (IGS) are clustered at chromosomal loci where they are not associated with ...
DE LUCCHINI, STEFANIA +2 more
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Ribosomal DNA (rDNA) variation in the species Triturus vulgaris meridionalis (Amphibia, Urodela) is remarkable because of unusually high intraspecific variability in the number and distribution of ribosomal loci in the karyotype; in addition, portions of the intergenic spacer (IGS) are clustered at chromosomal loci where they are not associated with ...
DE LUCCHINI, STEFANIA +2 more
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A new role of the rDNA and nucleolus in the nucleus—rDNA instability maintains genome integrity
BioEssays, 2008AbstractThe nucleolus is a region of the nucleus with high protein density and it acts as a ribosome factory. The nucleolus contains a distinct region of the genome, the ribosomal RNA gene repeats (rDNA) that supply ribosomal RNA (rRNA) molecules.
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RDNA-SYN-001: Nature Biotechnology March 17 2026 reports generative AI models that are manufacturing-constraint-aware, enabling petascale DNA synthesis — 10^15 to 10^17 designed sequences — at trillion-fold reduced cost, producing realistic antibodies, T-cell receptors, and polymerases that are synthesizable on existing platforms without sequential ...
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rDNA Amplification: Application of 16S rDNA-Based Methods for Bacterial Identification
2000Continuing improvements in PCR and automated sequencing technologies, resulting in rapid acquisition of sequence data, have allowed these methods to be applied to the task of bacterial identification. The sequence of the 16S rDNA/RNA of bacterial strains has been demonstrated to be useful for phylogenetic analysis of different taxa.
Frederick A. Rainey, Erko Stackebrandt
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[Physical mapping of the 45S rDNA and 5S rDNA to rice prometaphase chromosome].
Yi chuan xue bao = Acta genetica Sinica, 2002Rice (Oryza sativa L.) is one of the most important cereal crops in the world. The chromosomes of rice are relatively small in size. With the help of fluorescence in situ hybridization (FISH), several rice DNAs have been localized on rice chromosomes. 45S rDNA and 5S rDNA are encoding sequences for ribosomal RNA synthesis. For detecting the chromosomes
Zhi-Yun, Gong +3 more
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