Select output fields

Family Genus Specific epithet Specific authority Infraspecific category
2C mean1(pg) 2C mean1(mbp) 2C range1 pg
Chromosome number (2n) Ploidy level
Number of 5S signals Range of 5S signals Position2 of 5S signals (5S P)
Number of 45S3 signals Range of 45S signals Position2 of 45S signals (45S P) Arrangement
Autosome or sex chromosome 5S chrom. type
Sex chrom. number 45S chrom. type
B chromosomes Ag-NOR
Original reference

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Family   Genus   Specific epithet
Chromosome number from: -   Ploidy level from: -

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1 source: Animal genome size database (
2 position refers to interstitial, pericentromeric, distal or occupying whole chromosome arm
3 refers to 45S rDNA (18S-5.8S-26S rRNA genes)

Contact and comments

The Animal rDNA database is maintained and updated by the Department of Molecular Epigenetics at the Institute of Biophysics.

The database environment has been developed by Francisco Gá

Questions, suggestions or any comments regarding the database will be answered in a short period, normally within 1-2 working days, and should be addressed to:

Tel: +420 541517178

You can also contact us here:

Name:       E-mail:   Subject:  


NOTE: We acknowledge any new or overlooked publication on molecular cytogenetics of animal rDNA. The requests for any data corrections are accepted


All comments and suggestions about this website are welcome. Thanks!

Animal rDNA Database