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Family Genus Specific epithet Specific authority Infraspecific epithet Infraspecific authority
2C mean1(pg) 2C mean1(mbp) 2C range1 pg Life cycle
Other specifications (cultivar, population, strain, etc.) Original reference Journal Year
Number of 5S signals Range of 5S signals Position2 of 5S signals
Number of 35S3 signals Range of 35S signals Position2 of 35S signals Arrangement
Total number of rDNA signals (5S+35S) Number of chromosomes with both 5S and 35S signals (SC)
Number of chromosomes with both 5S and 35S in the same arm (SA) Number of chromosomes with co-localized 5S and 35S signals (Coloc.)

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1 1C genome size and n chromosome number for bryophytes.
2 Position refers to that of most chromosomes in the species and can be either interstitial (i), (peri-)centromeric (c) and (sub-)terminal or satellite (t).
3 35S=45S=18S-5.8S-26S rDNA

Impact of dysploidy and polyploidy on the diversification of high mountain Artemisia (Asteraceae) and allies

Impact of dysploidy and polyploidy on the diversification of high mountain Artemisia (Asteraceae) and allies

Mas de Xaxars G, Garnatje T, Pellicer J, Siljak-Yakovlev S, Vallès J, Garcia S. Alpine Botany, in press. Molecular cytogenetics and the study of genome size have been used to understand evolutionary and systematic relationships in many species. However, this approach has seldom been applied to alpine plants. A group of dysploid–polyploid high mountain Artemisia […]

International Conference on Polyploidy, Hybridization and Biodiversity

International Conference on Polyploidy, Hybridization and Biodiversity

11-14 May 2016, Rovinj, Croatia This conference presents cutting edge research into the importance of polyploidy in genetics, evolution and ecology. It will be distinctive in its small group dynamics, wonderful location and great speakers. There will be three core sessions over two and a half days; these are: (1) the long-term and (2) immediate […]

The striking and unexpected cytogenetic diversity of genus Tanacetum L. (Asteraceae): a cytometric and fluorescent in situ hybridisation study of Iranian taxa

The striking and unexpected cytogenetic diversity of genus Tanacetum L. (Asteraceae): a cytometric and fluorescent in situ hybridisation study of Iranian taxa

See our latest article on Tanacetum cytogenetics and genome sizes! Background Although karyologically well studied, the genus Tanacetum (Asteraceae) is poorly known from the perspective of molecular cytogenetics. The prevalence of polyploidy, including odd ploidy warranted an extensive cytogenetic study. We studied several species native to Iran, one of the most important centres of diversity […]

Scientific session commemorating the 50th anniversary of the death of Pius Font i Quer (1964-2014)

This year we commemorate the 50th anniversary of Pius Font i Quer’s death. He is an important and beloved botanist in our country, and many acts are being performed these days to praise his figure. One of them is the Scientific session that will be held next Tuesday 2nd December in the Institut d’Estudis Catalans, […]

Cytogenetic characterization and nuclear DNA content of three North African endemic Centaurea species

Cytogenetic characterization and nuclear DNA content of three North African endemic Centaurea species

Benamara-Bellagha, M., Baziz, K., Pustahija, F., Khalfallah, N., & Siljak-Yakovlev, S. (2014). Cytogenetic characterization and nuclear DNA content of three North African endemic Centaurea species. Plant Biosystems-An International Journal Dealing with all Aspects of Plant Biology, (just-accepted), 1-23. Three endemic Centaurea species from North Africa are investigated for the first time by chromomycin fluorochrome banding for GC-rich DNA […]

Patterns of chromosomal variation in natural populations of the neoallotetraploid Tragopogon mirus (Asteraceae)

Patterns of chromosomal variation in natural populations of the neoallotetraploid Tragopogon mirus (Asteraceae)

Chester, M., Riley, R. K., Soltis, P. S., & Soltis, D. E. (2014). Patterns of chromosomal variation in natural populations of the neoallotetraploid Tragopogon mirus (Asteraceae). Heredity. In this study authors assess chromosomal composition in a natural neoallotetraploid, Tragopogon mirus, and compare it with T. miscellus, which is an allotetraploid of similar age (~40 generations old). […]

When fathers are instant losers: homogenization of rDNA loci in recently formed Cardamine Ă— schulzii trigenomic allopolyploid

When fathers are instant losers: homogenization of rDNA loci in recently formed Cardamine Ă— schulzii trigenomic allopolyploid

See this interesting new paper on Cardamine rDNA biology, coauthored by of one of the members of the Plant rDNA database team, Dr. Ales Kovarik! Congratulations Ales! It will be included in the next Update for sure. ABSTRACT: Recently formed allopolyploids represent an excellent system to study the impacts of hybridization and genomic duplication on genome […]

Release 2.0 of Plant rDNA database now in DATABASE!

Release 2.0 of Plant rDNA database now in DATABASE!

We are happy to anounce the recent publication of  release 2.0 of this database in the journal “Database – The Journal of Biological Databases and Curation”. The paper can be downloaded here. Plant rDNA database: update and new features. Sònia Garcia, Francisco Gálvez, Airy Gras, Aleš Kovařík and Teresa Garnatje. Database 2014/bau063 Read it to know more about the new data and features included!

Mechanisms of plant speciation 9 – 13 June 2015 | Norrtälje, Sweden

Mechanisms of plant speciation 9 – 13 June 2015 | Norrtälje, Sweden

This EMBO Workshop will present frontier research on speciation mechanisms in plants, focusing in particular on the genetic mechanisms establishing hybridization barriers, the role of natural selection in driving speciation, the importance of hybridization and polyploidization in speciation, and the environmental conditions promoting speciation. Speciation has been studied since Darwin, but the advance of sequencing […]

Unique Chromosomes Preserved In Jurassic Plant Fossil: Fossilized Nuclei and Chromosomes Reveal 180 Million Years of Genomic Stasis in Royal Ferns

Unique Chromosomes Preserved In Jurassic Plant Fossil: Fossilized Nuclei and Chromosomes Reveal 180 Million Years of Genomic Stasis in Royal Ferns

By Benjamin Bomfleur, Stephen McLoughlin, Vivi Vajda Rapidly permineralized fossils can provide exceptional insights into the evolution of life over geological time. Here, the authors presented an exquisitely preserved, calcified stem of a royal fern (Osmundaceae) from Early Jurassic lahar deposits of Sweden in which authigenic mineral precipitation from hydrothermal brines occurred so rapidly that it preserved cytoplasm, cytosol granules, […]